/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 22:04:54,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 22:04:54,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 22:04:54,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 22:04:54,867 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 [2021-06-12 22:04:54,889 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 22:04:54,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 22:04:54,890 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 22:04:54,890 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 22:04:54,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 22:04:54,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 22:04:54,892 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 22:04:54,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 22:04:54,892 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 22:04:54,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 22:04:54,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 22:04:54,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 22:04:54,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 22:04:54,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 22:04:54,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 22:04:54,893 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 22:04:54,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 22:04:54,893 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 22:04:54,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 22:04:54,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 22:04:54,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 22:04:54,894 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 22:04:54,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 22:04:54,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 22:04:54,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 22:04:54,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 22:04:54,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 22:04:54,894 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 22:04:54,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 22:04:54,894 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 22:04:54,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 22:04:54,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 22:04:55,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 22:04:55,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 22:04:55,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 22:04:55,184 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 22:04:55,186 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 22:04:55,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array-hom.wvr.bpl [2021-06-12 22:04:55,187 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array-hom.wvr.bpl' [2021-06-12 22:04:55,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 22:04:55,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 22:04:55,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 22:04:55,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 22:04:55,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 22:04:55,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:04:55" (1/1) ... [2021-06-12 22:04:55,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:04:55" (1/1) ... [2021-06-12 22:04:55,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 22:04:55,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 22:04:55,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 22:04:55,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 22:04:55,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:04:55" (1/1) ... [2021-06-12 22:04:55,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:04:55" (1/1) ... [2021-06-12 22:04:55,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:04:55" (1/1) ... [2021-06-12 22:04:55,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:04:55" (1/1) ... [2021-06-12 22:04:55,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:04:55" (1/1) ... [2021-06-12 22:04:55,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:04:55" (1/1) ... [2021-06-12 22:04:55,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:04:55" (1/1) ... [2021-06-12 22:04:55,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 22:04:55,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 22:04:55,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 22:04:55,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 22:04:55,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:04:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 22:04:55,338 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 22:04:55,339 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 22:04:55,339 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 22:04:55,339 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 22:04:55,339 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 22:04:55,339 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 22:04:55,340 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 22:04:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 22:04:55,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 22:04:55,340 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 22:04:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 22:04:55,340 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 22:04:55,341 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 22:04:55,543 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 22:04:55,544 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 22:04:55,545 INFO L202 PluginConnector]: Adding new model min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:04:55 BoogieIcfgContainer [2021-06-12 22:04:55,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 22:04:55,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 22:04:55,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 22:04:55,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 22:04:55,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:04:55" (1/2) ... [2021-06-12 22:04:55,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee2421 and model type min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 10:04:55, skipping insertion in model container [2021-06-12 22:04:55,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:04:55" (2/2) ... [2021-06-12 22:04:55,550 INFO L111 eAbstractionObserver]: Analyzing ICFG min-array-hom.wvr.bpl [2021-06-12 22:04:55,554 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 22:04:55,554 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 22:04:55,554 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 22:04:55,555 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 22:04:55,596 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 22:04:55,610 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 22:04:55,621 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 22:04:55,622 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 22:04:55,622 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 22:04:55,622 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 22:04:55,622 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 22:04:55,622 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 22:04:55,622 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 22:04:55,622 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 22:04:55,628 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-12 22:04:55,642 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:55,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:55,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 22:04:55,650 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:55,651 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:55,651 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:55,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:55,654 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-06-12 22:04:55,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:55,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126412114] [2021-06-12 22:04:55,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:55,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:55,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126412114] [2021-06-12 22:04:55,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126412114] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:04:55,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:04:55,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 22:04:55,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708479433] [2021-06-12 22:04:55,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 22:04:55,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:55,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 22:04:55,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 22:04:55,851 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:55,893 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-06-12 22:04:55,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 22:04:55,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 22:04:55,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:55,905 INFO L225 Difference]: With dead ends: 217 [2021-06-12 22:04:55,905 INFO L226 Difference]: Without dead ends: 202 [2021-06-12 22:04:55,906 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 22:04:55,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-12 22:04:55,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-12 22:04:55,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:55,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-06-12 22:04:55,946 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-06-12 22:04:55,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:55,947 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-06-12 22:04:55,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:55,947 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-06-12 22:04:55,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 22:04:55,948 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:55,948 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:55,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 22:04:55,949 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:55,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:55,949 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-06-12 22:04:55,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:55,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513919690] [2021-06-12 22:04:55,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:55,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:55,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513919690] [2021-06-12 22:04:55,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513919690] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:04:55,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:04:55,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 22:04:55,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513320189] [2021-06-12 22:04:55,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 22:04:55,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:55,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 22:04:55,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 22:04:55,993 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:56,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:56,031 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-06-12 22:04:56,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 22:04:56,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 22:04:56,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:56,032 INFO L225 Difference]: With dead ends: 158 [2021-06-12 22:04:56,032 INFO L226 Difference]: Without dead ends: 158 [2021-06-12 22:04:56,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:04:56,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-12 22:04:56,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-06-12 22:04:56,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:56,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-12 22:04:56,041 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-06-12 22:04:56,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:56,041 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-12 22:04:56,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:56,041 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-12 22:04:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 22:04:56,042 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:56,042 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:56,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 22:04:56,042 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:56,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:56,043 INFO L82 PathProgramCache]: Analyzing trace with hash 275548602, now seen corresponding path program 1 times [2021-06-12 22:04:56,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:56,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616139497] [2021-06-12 22:04:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:56,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:56,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616139497] [2021-06-12 22:04:56,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616139497] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:04:56,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:04:56,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 22:04:56,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164526534] [2021-06-12 22:04:56,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:04:56,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:56,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:04:56,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:04:56,071 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:56,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:56,111 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-06-12 22:04:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 22:04:56,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 22:04:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:56,115 INFO L225 Difference]: With dead ends: 183 [2021-06-12 22:04:56,118 INFO L226 Difference]: Without dead ends: 183 [2021-06-12 22:04:56,118 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:04:56,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-12 22:04:56,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-12 22:04:56,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-12 22:04:56,126 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-12 22:04:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:56,127 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-12 22:04:56,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-12 22:04:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:04:56,128 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:56,128 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:56,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 22:04:56,128 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:56,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:56,129 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-06-12 22:04:56,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:56,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282497431] [2021-06-12 22:04:56,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:56,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:56,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282497431] [2021-06-12 22:04:56,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282497431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:56,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659746544] [2021-06-12 22:04:56,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:56,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 22:04:56,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:56,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:04:56,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:04:56,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-12 22:04:56,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:04:56,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:04:56,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:04:56,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 22:04:56,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:04:56,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:04:56,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 22:04:56,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:04:56,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:04:56,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:04:56,900 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:97, output treesize:21 [2021-06-12 22:04:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:56,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659746544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:56,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:56,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:04:56,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063338456] [2021-06-12 22:04:56,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:04:56,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:56,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:04:56,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:04:56,936 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:57,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:57,150 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-12 22:04:57,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:04:57,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 22:04:57,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:57,153 INFO L225 Difference]: With dead ends: 330 [2021-06-12 22:04:57,153 INFO L226 Difference]: Without dead ends: 315 [2021-06-12 22:04:57,154 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 389.0ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:04:57,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-12 22:04:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-12 22:04:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:57,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-12 22:04:57,174 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-12 22:04:57,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:57,174 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-12 22:04:57,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:57,174 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-12 22:04:57,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:04:57,176 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:57,176 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:57,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:57,393 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:57,393 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-06-12 22:04:57,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:57,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548396789] [2021-06-12 22:04:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:57,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:57,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548396789] [2021-06-12 22:04:57,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548396789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:57,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115234892] [2021-06-12 22:04:57,601 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 [2021-06-12 22:04:57,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:04:57,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:57,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 22:04:57,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:57,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:04:57,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 22:04:57,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:04:57,817 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:04:57,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-12 22:04:57,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:04:57,827 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:04:57,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-12 22:04:57,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:04:57,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:04:57,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:04:57,838 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:04:57,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:04:57,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:04:57,898 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:122 [2021-06-12 22:04:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:58,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115234892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:58,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:58,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-12 22:04:58,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151923065] [2021-06-12 22:04:58,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:04:58,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:58,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:04:58,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:04:58,066 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) 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) [2021-06-12 22:04:58,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:58,578 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-12 22:04:58,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:04:58,581 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) 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 22 [2021-06-12 22:04:58,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:58,584 INFO L225 Difference]: With dead ends: 374 [2021-06-12 22:04:58,584 INFO L226 Difference]: Without dead ends: 359 [2021-06-12 22:04:58,584 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 649.0ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:04:58,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-12 22:04:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-12 22:04:58,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:58,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-12 22:04:58,595 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-12 22:04:58,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:58,599 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-12 22:04:58,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) 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) [2021-06-12 22:04:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-12 22:04:58,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:04:58,604 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:58,604 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:58,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 22:04:58,821 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:58,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:58,821 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-06-12 22:04:58,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:58,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751740788] [2021-06-12 22:04:58,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:59,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:59,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751740788] [2021-06-12 22:04:59,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751740788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:59,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878353186] [2021-06-12 22:04:59,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:59,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:04:59,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:59,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:04:59,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:59,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:04:59,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:04:59,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 22:04:59,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:04:59,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:04:59,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 22:04:59,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:04:59,242 INFO L628 ElimStorePlain]: treesize reduction 35, result has 56.8 percent of original size [2021-06-12 22:04:59,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:04:59,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 22:04:59,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:04:59,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:04:59,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:04:59,261 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:121, output treesize:21 [2021-06-12 22:04:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:59,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878353186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:59,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:59,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 22:04:59,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805788839] [2021-06-12 22:04:59,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:04:59,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:59,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:04:59,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:04:59,312 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:59,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:59,490 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-06-12 22:04:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:04:59,492 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 22:04:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:59,493 INFO L225 Difference]: With dead ends: 296 [2021-06-12 22:04:59,493 INFO L226 Difference]: Without dead ends: 281 [2021-06-12 22:04:59,493 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:04:59,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-12 22:04:59,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-06-12 22:04:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-12 22:04:59,498 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-12 22:04:59,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:59,498 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-12 22:04:59,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:59,498 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-12 22:04:59,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:04:59,499 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:59,499 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:59,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 22:04:59,716 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:59,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:59,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-06-12 22:04:59,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:59,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797832538] [2021-06-12 22:04:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:59,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:59,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797832538] [2021-06-12 22:04:59,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797832538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:59,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322126995] [2021-06-12 22:04:59,883 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:59,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:04:59,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:59,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 22:04:59,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:00,087 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:05:00,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-12 22:05:00,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:00,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:00,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:05:00,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:00,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:00,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:00,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 22:05:00,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:00,166 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:05:00,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-12 22:05:00,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:00,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:00,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:05:00,230 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:98 [2021-06-12 22:05:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:00,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322126995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:00,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:00,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:05:00,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767628901] [2021-06-12 22:05:00,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:05:00,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:00,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:05:00,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:05:00,350 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:00,643 INFO L93 Difference]: Finished difference Result 409 states and 1185 transitions. [2021-06-12 22:05:00,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:05:00,644 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 22:05:00,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:00,645 INFO L225 Difference]: With dead ends: 409 [2021-06-12 22:05:00,645 INFO L226 Difference]: Without dead ends: 394 [2021-06-12 22:05:00,646 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 441.3ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:05:00,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-12 22:05:00,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 247. [2021-06-12 22:05:00,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:00,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-12 22:05:00,651 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-12 22:05:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:00,651 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-12 22:05:00,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:00,651 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-12 22:05:00,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:00,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:00,652 INFO L472 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] [2021-06-12 22:05:00,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:00,869 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:00,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:00,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-06-12 22:05:00,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:00,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185216088] [2021-06-12 22:05:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:00,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:00,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185216088] [2021-06-12 22:05:00,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185216088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:00,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734636114] [2021-06-12 22:05:00,903 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:00,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:05:00,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:00,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:00,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:01,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734636114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:01,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:01,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:05:01,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441265020] [2021-06-12 22:05:01,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:05:01,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:01,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:05:01,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:05:01,010 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:01,354 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-12 22:05:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:05:01,354 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 24 [2021-06-12 22:05:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:01,357 INFO L225 Difference]: With dead ends: 619 [2021-06-12 22:05:01,357 INFO L226 Difference]: Without dead ends: 619 [2021-06-12 22:05:01,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:05:01,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-12 22:05:01,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-12 22:05:01,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-12 22:05:01,364 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-12 22:05:01,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:01,364 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-12 22:05:01,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-12 22:05:01,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:01,365 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:01,365 INFO L472 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] [2021-06-12 22:05:01,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-12 22:05:01,579 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:01,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:01,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-06-12 22:05:01,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:01,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294069547] [2021-06-12 22:05:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:01,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:01,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294069547] [2021-06-12 22:05:01,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294069547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:01,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140392988] [2021-06-12 22:05:01,624 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:01,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:05:01,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:01,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:01,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:01,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140392988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:01,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:01,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:05:01,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954892255] [2021-06-12 22:05:01,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:05:01,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:01,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:05:01,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:05:01,736 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:02,484 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-12 22:05:02,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:05:02,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:02,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:02,488 INFO L225 Difference]: With dead ends: 1078 [2021-06-12 22:05:02,488 INFO L226 Difference]: Without dead ends: 1078 [2021-06-12 22:05:02,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 493.2ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:05:02,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-12 22:05:02,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-12 22:05:02,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:02,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-12 22:05:02,498 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-12 22:05:02,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:02,498 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-12 22:05:02,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:02,499 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-12 22:05:02,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:02,500 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:02,500 INFO L472 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] [2021-06-12 22:05:02,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:02,717 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:02,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:02,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-06-12 22:05:02,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:02,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139987521] [2021-06-12 22:05:02,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:02,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:02,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139987521] [2021-06-12 22:05:02,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139987521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:02,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6857029] [2021-06-12 22:05:02,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:02,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:02,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:02,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6857029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:02,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:02,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:05:02,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121271489] [2021-06-12 22:05:02,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:05:02,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:02,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:05:02,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:05:02,873 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:03,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:03,544 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-12 22:05:03,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:05:03,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:03,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:03,548 INFO L225 Difference]: With dead ends: 951 [2021-06-12 22:05:03,548 INFO L226 Difference]: Without dead ends: 951 [2021-06-12 22:05:03,548 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 375.6ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:05:03,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-12 22:05:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-12 22:05:03,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:03,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-12 22:05:03,556 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-12 22:05:03,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:03,556 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-12 22:05:03,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:03,557 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-12 22:05:03,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:03,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:03,557 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:03,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:03,777 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:03,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-06-12 22:05:03,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:03,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013543351] [2021-06-12 22:05:03,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:05:03,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:03,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013543351] [2021-06-12 22:05:03,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013543351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:03,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505353064] [2021-06-12 22:05:03,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:03,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:05:03,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:05:03,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505353064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:03,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:03,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 22:05:03,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283324613] [2021-06-12 22:05:03,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:05:03,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:03,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:05:03,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:05:03,890 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:03,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:03,990 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-12 22:05:03,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:05:03,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:03,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:03,993 INFO L225 Difference]: With dead ends: 669 [2021-06-12 22:05:03,993 INFO L226 Difference]: Without dead ends: 663 [2021-06-12 22:05:03,993 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:05:03,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-12 22:05:04,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-12 22:05:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-12 22:05:04,002 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-12 22:05:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:04,002 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-12 22:05:04,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:04,002 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-12 22:05:04,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:04,003 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:04,003 INFO L472 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] [2021-06-12 22:05:04,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 22:05:04,217 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:04,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:04,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-06-12 22:05:04,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:04,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702731289] [2021-06-12 22:05:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:04,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:04,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702731289] [2021-06-12 22:05:04,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702731289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:04,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714209838] [2021-06-12 22:05:04,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:04,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:05:04,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:04,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:04,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:04,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714209838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:04,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:04,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 22:05:04,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395568730] [2021-06-12 22:05:04,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:05:04,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:04,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:05:04,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:05:04,523 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:04,716 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-12 22:05:04,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:05:04,717 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:04,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:04,719 INFO L225 Difference]: With dead ends: 710 [2021-06-12 22:05:04,719 INFO L226 Difference]: Without dead ends: 672 [2021-06-12 22:05:04,719 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:05:04,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-12 22:05:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-12 22:05:04,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-12 22:05:04,729 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-12 22:05:04,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:04,729 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-12 22:05:04,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-12 22:05:04,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:04,730 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:04,730 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:04,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:04,943 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:04,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:04,943 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-06-12 22:05:04,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:04,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128465302] [2021-06-12 22:05:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:05:04,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:04,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128465302] [2021-06-12 22:05:04,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128465302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:04,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366925639] [2021-06-12 22:05:04,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:05,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:05:05,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:05,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:05:05,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:05:05,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366925639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:05,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:05,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 22:05:05,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231134809] [2021-06-12 22:05:05,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:05:05,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:05,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:05:05,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:05:05,047 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:05,132 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-12 22:05:05,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:05:05,132 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:05,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:05,135 INFO L225 Difference]: With dead ends: 830 [2021-06-12 22:05:05,135 INFO L226 Difference]: Without dead ends: 830 [2021-06-12 22:05:05,135 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:05:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-12 22:05:05,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-12 22:05:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-12 22:05:05,146 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-12 22:05:05,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:05,146 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-12 22:05:05,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:05,147 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-12 22:05:05,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:05,147 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:05,148 INFO L472 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] [2021-06-12 22:05:05,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:05,357 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:05,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:05,357 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-06-12 22:05:05,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:05,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973806491] [2021-06-12 22:05:05,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:05,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:05,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973806491] [2021-06-12 22:05:05,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973806491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:05,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181704297] [2021-06-12 22:05:05,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:05,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:05:05,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:05,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:05,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:05,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181704297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:05,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:05,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:05:05,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642472145] [2021-06-12 22:05:05,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:05:05,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:05,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:05:05,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:05:05,498 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:05,776 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-12 22:05:05,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:05:05,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:05,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:05,780 INFO L225 Difference]: With dead ends: 1196 [2021-06-12 22:05:05,780 INFO L226 Difference]: Without dead ends: 1196 [2021-06-12 22:05:05,781 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:05:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-12 22:05:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-12 22:05:05,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:05,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-12 22:05:05,792 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-12 22:05:05,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:05,793 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-12 22:05:05,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:05,793 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-12 22:05:05,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:05,794 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:05,794 INFO L472 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] [2021-06-12 22:05:06,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 22:05:06,011 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:06,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:06,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-06-12 22:05:06,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:06,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462719837] [2021-06-12 22:05:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:06,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:06,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462719837] [2021-06-12 22:05:06,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462719837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:06,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111145115] [2021-06-12 22:05:06,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:06,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:05:06,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:06,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:06,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:06,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111145115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:06,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:06,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:05:06,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587227822] [2021-06-12 22:05:06,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:05:06,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:06,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:05:06,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:05:06,181 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:06,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:06,543 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-12 22:05:06,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:05:06,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:06,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:06,549 INFO L225 Difference]: With dead ends: 1492 [2021-06-12 22:05:06,549 INFO L226 Difference]: Without dead ends: 1492 [2021-06-12 22:05:06,551 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:05:06,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-12 22:05:06,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-12 22:05:06,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-12 22:05:06,567 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-12 22:05:06,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:06,567 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-12 22:05:06,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:06,568 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-12 22:05:06,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:06,569 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:06,569 INFO L472 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] [2021-06-12 22:05:06,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 22:05:06,788 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:06,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:06,788 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-06-12 22:05:06,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:06,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501602871] [2021-06-12 22:05:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:06,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:06,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501602871] [2021-06-12 22:05:06,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501602871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:06,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498964] [2021-06-12 22:05:06,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:06,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:05:06,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:06,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:06,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:06,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:06,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:06,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 22:05:06,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592894966] [2021-06-12 22:05:07,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:05:07,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:07,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:05:07,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:05:07,004 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:07,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:07,319 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-12 22:05:07,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:05:07,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:07,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:07,323 INFO L225 Difference]: With dead ends: 1258 [2021-06-12 22:05:07,323 INFO L226 Difference]: Without dead ends: 1248 [2021-06-12 22:05:07,324 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:05:07,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-12 22:05:07,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-12 22:05:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-12 22:05:07,337 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-12 22:05:07,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:07,337 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-12 22:05:07,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-12 22:05:07,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:07,339 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:07,339 INFO L472 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] [2021-06-12 22:05:07,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-12 22:05:07,555 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:07,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:07,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-06-12 22:05:07,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:07,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946016968] [2021-06-12 22:05:07,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:07,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:07,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946016968] [2021-06-12 22:05:07,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946016968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:07,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193731179] [2021-06-12 22:05:07,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:07,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:05:07,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:07,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:07,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:07,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193731179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:07,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:07,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 22:05:07,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516602418] [2021-06-12 22:05:07,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:05:07,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:07,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:05:07,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:05:07,700 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:07,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:07,948 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-12 22:05:07,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:05:07,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 24 [2021-06-12 22:05:07,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:07,954 INFO L225 Difference]: With dead ends: 1329 [2021-06-12 22:05:07,954 INFO L226 Difference]: Without dead ends: 1329 [2021-06-12 22:05:07,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:05:07,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-12 22:05:07,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-12 22:05:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-12 22:05:07,993 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-12 22:05:07,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:07,993 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-12 22:05:07,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:07,993 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-12 22:05:07,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:07,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:07,995 INFO L472 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] [2021-06-12 22:05:08,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:08,195 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:08,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:08,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-06-12 22:05:08,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:08,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578267838] [2021-06-12 22:05:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:08,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:08,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578267838] [2021-06-12 22:05:08,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578267838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:08,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126736890] [2021-06-12 22:05:08,331 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 [2021-06-12 22:05:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:08,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:08,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:08,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126736890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:08,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:08,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:05:08,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016383166] [2021-06-12 22:05:08,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:05:08,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:08,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:05:08,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:05:08,428 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:08,770 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-12 22:05:08,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:05:08,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:08,775 INFO L225 Difference]: With dead ends: 1548 [2021-06-12 22:05:08,775 INFO L226 Difference]: Without dead ends: 1544 [2021-06-12 22:05:08,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 256.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:05:08,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-12 22:05:08,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-12 22:05:08,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-12 22:05:08,790 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-12 22:05:08,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:08,790 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-12 22:05:08,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:08,790 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-12 22:05:08,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:08,792 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:08,792 INFO L472 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] [2021-06-12 22:05:09,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:09,005 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:09,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:09,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-06-12 22:05:09,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:09,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325268993] [2021-06-12 22:05:09,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:09,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:09,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325268993] [2021-06-12 22:05:09,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325268993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:09,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188109131] [2021-06-12 22:05:09,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:09,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:05:09,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:09,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:09,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:09,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188109131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:09,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:09,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:05:09,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294132314] [2021-06-12 22:05:09,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:05:09,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:09,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:05:09,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:05:09,145 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:09,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:09,843 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-12 22:05:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:05:09,844 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:09,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:09,858 INFO L225 Difference]: With dead ends: 2734 [2021-06-12 22:05:09,858 INFO L226 Difference]: Without dead ends: 2734 [2021-06-12 22:05:09,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 408.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:05:09,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-12 22:05:09,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-12 22:05:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:09,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-12 22:05:09,882 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-12 22:05:09,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:09,882 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-12 22:05:09,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:09,882 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-12 22:05:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:09,883 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:09,883 INFO L472 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] [2021-06-12 22:05:10,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:10,097 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:10,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:10,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-06-12 22:05:10,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:10,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57831050] [2021-06-12 22:05:10,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:10,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:10,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57831050] [2021-06-12 22:05:10,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57831050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:10,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30349414] [2021-06-12 22:05:10,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:10,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:05:10,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:10,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:10,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:10,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30349414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:10,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:10,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:05:10,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084157475] [2021-06-12 22:05:10,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:05:10,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:10,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:05:10,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:05:10,358 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:11,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:11,091 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-12 22:05:11,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:05:11,091 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:11,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:11,097 INFO L225 Difference]: With dead ends: 2693 [2021-06-12 22:05:11,097 INFO L226 Difference]: Without dead ends: 2693 [2021-06-12 22:05:11,098 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 477.3ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:05:11,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-12 22:05:11,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-12 22:05:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:11,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-12 22:05:11,120 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-12 22:05:11,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:11,120 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-12 22:05:11,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:11,120 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-12 22:05:11,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:11,121 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:11,121 INFO L472 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] [2021-06-12 22:05:11,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-12 22:05:11,335 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:11,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:11,336 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-06-12 22:05:11,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:11,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290601676] [2021-06-12 22:05:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:11,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:11,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290601676] [2021-06-12 22:05:11,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290601676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:11,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286679860] [2021-06-12 22:05:11,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:05:11,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:05:11,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:11,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:11,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:11,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286679860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:11,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:11,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:05:11,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338215032] [2021-06-12 22:05:11,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:05:11,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:11,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:05:11,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:05:11,492 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:12,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:12,074 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-12 22:05:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:05:12,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:12,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:12,080 INFO L225 Difference]: With dead ends: 2677 [2021-06-12 22:05:12,080 INFO L226 Difference]: Without dead ends: 2677 [2021-06-12 22:05:12,081 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 329.5ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:05:12,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-12 22:05:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-12 22:05:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-12 22:05:12,103 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-12 22:05:12,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:12,103 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-12 22:05:12,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-12 22:05:12,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:12,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:12,104 INFO L472 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] [2021-06-12 22:05:12,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 22:05:12,325 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:12,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:12,325 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-06-12 22:05:12,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:12,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802715113] [2021-06-12 22:05:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:12,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:12,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802715113] [2021-06-12 22:05:12,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802715113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:12,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054189732] [2021-06-12 22:05:12,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:12,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:05:12,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:12,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:12,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:12,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054189732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:12,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:12,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:05:12,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766206004] [2021-06-12 22:05:12,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:05:12,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:12,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:05:12,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:05:12,470 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:12,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:12,991 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-12 22:05:12,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:05:12,991 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:12,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:12,996 INFO L225 Difference]: With dead ends: 2474 [2021-06-12 22:05:12,996 INFO L226 Difference]: Without dead ends: 2470 [2021-06-12 22:05:12,997 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:05:13,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-12 22:05:13,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-12 22:05:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:13,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-12 22:05:13,018 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-12 22:05:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:13,018 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-12 22:05:13,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:13,019 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-12 22:05:13,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:13,020 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:13,020 INFO L472 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] [2021-06-12 22:05:13,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-12 22:05:13,236 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:13,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:13,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-06-12 22:05:13,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:13,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678414290] [2021-06-12 22:05:13,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:13,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:13,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678414290] [2021-06-12 22:05:13,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678414290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:13,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183379905] [2021-06-12 22:05:13,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:13,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:05:13,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:13,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:13,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:13,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183379905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:13,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:13,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:05:13,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530488821] [2021-06-12 22:05:13,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:05:13,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:13,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:05:13,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:05:13,377 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:13,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:13,994 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-12 22:05:13,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:05:13,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-12 22:05:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:13,999 INFO L225 Difference]: With dead ends: 2514 [2021-06-12 22:05:13,999 INFO L226 Difference]: Without dead ends: 2514 [2021-06-12 22:05:14,000 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 378.0ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:05:14,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-12 22:05:14,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-12 22:05:14,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:14,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-12 22:05:14,019 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-12 22:05:14,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:14,020 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-12 22:05:14,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-12 22:05:14,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:14,021 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:14,021 INFO L472 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] [2021-06-12 22:05:14,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 22:05:14,237 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:14,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:14,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-06-12 22:05:14,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:14,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503883136] [2021-06-12 22:05:14,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:14,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:14,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503883136] [2021-06-12 22:05:14,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503883136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:14,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694078833] [2021-06-12 22:05:14,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:14,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:14,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:14,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694078833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:14,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:14,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:05:14,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206729406] [2021-06-12 22:05:14,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:05:14,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:14,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:05:14,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:05:14,361 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:15,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:15,033 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-12 22:05:15,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:05:15,034 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-12 22:05:15,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:15,045 INFO L225 Difference]: With dead ends: 2332 [2021-06-12 22:05:15,046 INFO L226 Difference]: Without dead ends: 2328 [2021-06-12 22:05:15,046 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 363.3ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:05:15,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-12 22:05:15,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-12 22:05:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:15,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-12 22:05:15,067 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-12 22:05:15,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:15,068 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-12 22:05:15,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:15,068 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-12 22:05:15,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:15,069 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:15,069 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:15,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-12 22:05:15,285 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:15,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:15,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-06-12 22:05:15,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:15,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707427580] [2021-06-12 22:05:15,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:15,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:05:15,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:15,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707427580] [2021-06-12 22:05:15,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707427580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:15,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305416045] [2021-06-12 22:05:15,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:15,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:05:15,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:15,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:05:15,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:05:15,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305416045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:15,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:15,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 22:05:15,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14883954] [2021-06-12 22:05:15,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:05:15,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:15,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:05:15,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:05:15,386 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:15,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:15,461 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-12 22:05:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:05:15,462 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:15,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:15,463 INFO L225 Difference]: With dead ends: 929 [2021-06-12 22:05:15,463 INFO L226 Difference]: Without dead ends: 929 [2021-06-12 22:05:15,463 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:05:15,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-12 22:05:15,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-12 22:05:15,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-12 22:05:15,476 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-12 22:05:15,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:15,476 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-12 22:05:15,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-12 22:05:15,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:15,478 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:15,478 INFO L472 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] [2021-06-12 22:05:15,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:15,693 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:15,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:15,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-06-12 22:05:15,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:15,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909049197] [2021-06-12 22:05:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:15,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:15,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909049197] [2021-06-12 22:05:15,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909049197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:15,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812798873] [2021-06-12 22:05:15,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:15,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:05:15,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:15,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:15,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:15,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812798873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:15,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:15,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 22:05:15,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279304650] [2021-06-12 22:05:15,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:05:15,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:15,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:05:15,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:05:15,789 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:16,036 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-12 22:05:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:05:16,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:16,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:16,038 INFO L225 Difference]: With dead ends: 1555 [2021-06-12 22:05:16,038 INFO L226 Difference]: Without dead ends: 1555 [2021-06-12 22:05:16,038 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:05:16,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-12 22:05:16,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-12 22:05:16,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:16,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-12 22:05:16,051 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-12 22:05:16,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:16,051 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-12 22:05:16,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:16,051 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-12 22:05:16,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:16,052 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:16,052 INFO L472 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] [2021-06-12 22:05:16,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:16,266 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:16,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:16,267 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-06-12 22:05:16,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:16,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621718103] [2021-06-12 22:05:16,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:16,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:16,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621718103] [2021-06-12 22:05:16,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621718103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:16,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245488758] [2021-06-12 22:05:16,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:16,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:05:16,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:16,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:16,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:16,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245488758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:16,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:16,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 22:05:16,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199577596] [2021-06-12 22:05:16,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:05:16,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:16,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:05:16,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:05:16,364 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:16,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:16,624 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-12 22:05:16,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:05:16,624 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:16,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:16,626 INFO L225 Difference]: With dead ends: 1605 [2021-06-12 22:05:16,626 INFO L226 Difference]: Without dead ends: 1605 [2021-06-12 22:05:16,626 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:05:16,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-12 22:05:16,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-12 22:05:16,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-12 22:05:16,640 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-12 22:05:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:16,640 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-12 22:05:16,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-12 22:05:16,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:16,642 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:16,642 INFO L472 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] [2021-06-12 22:05:16,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:16,857 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:16,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:16,857 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-06-12 22:05:16,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:16,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325115493] [2021-06-12 22:05:16,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:05:16,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:16,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325115493] [2021-06-12 22:05:16,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325115493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:16,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966328459] [2021-06-12 22:05:16,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:16,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:05:16,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:16,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:16,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:05:17,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966328459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:17,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:17,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 22:05:17,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517425054] [2021-06-12 22:05:17,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:05:17,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:17,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:05:17,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:05:17,025 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:17,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:17,236 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-12 22:05:17,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:05:17,237 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:17,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:17,238 INFO L225 Difference]: With dead ends: 1524 [2021-06-12 22:05:17,238 INFO L226 Difference]: Without dead ends: 1520 [2021-06-12 22:05:17,239 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:05:17,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-12 22:05:17,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-12 22:05:17,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-12 22:05:17,267 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-12 22:05:17,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:17,267 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-12 22:05:17,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:17,267 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-12 22:05:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:17,269 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:17,269 INFO L472 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] [2021-06-12 22:05:17,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-12 22:05:17,469 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:17,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:17,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-06-12 22:05:17,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:17,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100758179] [2021-06-12 22:05:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:17,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:17,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100758179] [2021-06-12 22:05:17,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100758179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:17,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146167011] [2021-06-12 22:05:17,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:17,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:05:17,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:17,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:17,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:17,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146167011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:17,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:17,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 22:05:17,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49809177] [2021-06-12 22:05:17,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:05:17,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:17,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:05:17,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:05:17,706 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:17,918 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-12 22:05:18,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:18,026 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-12 22:05:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:05:18,026 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:18,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:18,028 INFO L225 Difference]: With dead ends: 1508 [2021-06-12 22:05:18,028 INFO L226 Difference]: Without dead ends: 1496 [2021-06-12 22:05:18,030 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:05:18,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-12 22:05:18,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-12 22:05:18,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:18,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-12 22:05:18,052 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-12 22:05:18,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:18,053 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-12 22:05:18,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:18,053 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-12 22:05:18,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:18,054 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:18,054 INFO L472 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] [2021-06-12 22:05:18,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:18,261 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:18,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:18,261 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-06-12 22:05:18,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:18,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608115563] [2021-06-12 22:05:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:18,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:18,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608115563] [2021-06-12 22:05:18,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608115563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:18,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011649711] [2021-06-12 22:05:18,307 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 [2021-06-12 22:05:18,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:05:18,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:18,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:18,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:18,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011649711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:18,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:18,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:05:18,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053551096] [2021-06-12 22:05:18,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:05:18,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:18,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:05:18,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:05:18,428 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:18,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:18,890 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-12 22:05:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:05:18,890 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:18,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:18,893 INFO L225 Difference]: With dead ends: 2412 [2021-06-12 22:05:18,893 INFO L226 Difference]: Without dead ends: 2412 [2021-06-12 22:05:18,894 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 300.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:05:18,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-12 22:05:18,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-12 22:05:18,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:18,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-12 22:05:18,911 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-12 22:05:18,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:18,911 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-12 22:05:18,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-12 22:05:18,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:18,912 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:18,913 INFO L472 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] [2021-06-12 22:05:19,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-12 22:05:19,113 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:19,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:19,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-06-12 22:05:19,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:19,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901659667] [2021-06-12 22:05:19,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:19,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:19,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901659667] [2021-06-12 22:05:19,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901659667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:19,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544264967] [2021-06-12 22:05:19,142 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 [2021-06-12 22:05:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:19,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:19,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:19,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544264967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:19,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:19,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:05:19,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538752910] [2021-06-12 22:05:19,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:05:19,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:19,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:05:19,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:05:19,284 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:19,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:19,791 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-12 22:05:19,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:05:19,792 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:19,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:19,794 INFO L225 Difference]: With dead ends: 2335 [2021-06-12 22:05:19,794 INFO L226 Difference]: Without dead ends: 2335 [2021-06-12 22:05:19,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 312.5ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:05:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-12 22:05:19,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-12 22:05:19,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:19,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 22:05:19,811 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 22:05:19,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:19,811 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 22:05:19,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:19,811 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 22:05:19,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:19,813 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:19,813 INFO L472 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] [2021-06-12 22:05:20,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:20,016 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:20,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:20,016 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-06-12 22:05:20,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:20,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378541555] [2021-06-12 22:05:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:20,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:20,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378541555] [2021-06-12 22:05:20,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378541555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:20,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751896942] [2021-06-12 22:05:20,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:20,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:05:20,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:20,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:20,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:20,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751896942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:20,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:20,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:05:20,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45991141] [2021-06-12 22:05:20,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:05:20,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:20,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:05:20,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:05:20,157 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:20,540 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-12 22:05:20,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:05:20,540 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:20,543 INFO L225 Difference]: With dead ends: 2285 [2021-06-12 22:05:20,543 INFO L226 Difference]: Without dead ends: 2285 [2021-06-12 22:05:20,544 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 254.1ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:05:20,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-12 22:05:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-12 22:05:20,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-12 22:05:20,561 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-12 22:05:20,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:20,561 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-12 22:05:20,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:20,561 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-12 22:05:20,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:20,563 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:20,563 INFO L472 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] [2021-06-12 22:05:20,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-12 22:05:20,779 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:20,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:20,779 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-06-12 22:05:20,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:20,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505164922] [2021-06-12 22:05:20,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:20,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:20,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505164922] [2021-06-12 22:05:20,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505164922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:20,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669546882] [2021-06-12 22:05:20,823 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 [2021-06-12 22:05:20,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:05:20,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:20,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:20,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:20,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669546882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:20,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:20,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:05:20,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394567103] [2021-06-12 22:05:20,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:05:20,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:20,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:05:20,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:05:20,913 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:21,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:21,240 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-12 22:05:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:05:21,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:21,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:21,243 INFO L225 Difference]: With dead ends: 2176 [2021-06-12 22:05:21,243 INFO L226 Difference]: Without dead ends: 2172 [2021-06-12 22:05:21,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:05:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-12 22:05:21,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-12 22:05:21,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:21,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 22:05:21,261 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 22:05:21,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:21,261 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 22:05:21,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:21,261 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 22:05:21,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:21,263 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:21,263 INFO L472 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] [2021-06-12 22:05:21,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:21,463 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:21,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:21,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-06-12 22:05:21,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:21,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140404796] [2021-06-12 22:05:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:21,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:21,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140404796] [2021-06-12 22:05:21,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140404796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:21,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104243352] [2021-06-12 22:05:21,493 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 [2021-06-12 22:05:21,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:05:21,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:21,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:21,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:21,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104243352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:21,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:21,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:05:21,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814045207] [2021-06-12 22:05:21,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:05:21,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:21,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:05:21,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:05:21,585 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:21,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:21,967 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-12 22:05:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:05:21,967 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-12 22:05:21,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:21,970 INFO L225 Difference]: With dead ends: 2199 [2021-06-12 22:05:21,970 INFO L226 Difference]: Without dead ends: 2199 [2021-06-12 22:05:21,970 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:05:21,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-12 22:05:21,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-12 22:05:21,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:21,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-12 22:05:21,987 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-12 22:05:21,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:21,987 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-12 22:05:21,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:21,987 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-12 22:05:21,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:21,988 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:21,988 INFO L472 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] [2021-06-12 22:05:22,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-12 22:05:22,189 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:22,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:22,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-06-12 22:05:22,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:22,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912112645] [2021-06-12 22:05:22,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:22,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:22,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912112645] [2021-06-12 22:05:22,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912112645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:22,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767529003] [2021-06-12 22:05:22,252 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 [2021-06-12 22:05:22,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:05:22,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:22,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:22,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:22,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767529003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:22,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:22,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:05:22,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436402367] [2021-06-12 22:05:22,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:05:22,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:22,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:05:22,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:05:22,342 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:22,658 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-12 22:05:22,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:05:22,659 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-12 22:05:22,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:22,661 INFO L225 Difference]: With dead ends: 2156 [2021-06-12 22:05:22,661 INFO L226 Difference]: Without dead ends: 2152 [2021-06-12 22:05:22,661 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:05:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-12 22:05:22,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-12 22:05:22,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:22,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 22:05:22,678 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 22:05:22,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:22,678 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 22:05:22,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:22,678 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 22:05:22,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:22,679 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:22,679 INFO L472 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] [2021-06-12 22:05:22,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-12 22:05:22,895 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:22,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:22,896 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-06-12 22:05:22,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:22,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314240239] [2021-06-12 22:05:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:22,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:22,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314240239] [2021-06-12 22:05:22,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314240239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:22,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694401079] [2021-06-12 22:05:22,936 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 [2021-06-12 22:05:22,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:05:22,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:22,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:22,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:23,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694401079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:23,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:23,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:05:23,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887880509] [2021-06-12 22:05:23,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:05:23,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:23,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:05:23,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:05:23,021 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:23,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:23,318 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-12 22:05:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:05:23,318 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:23,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:23,320 INFO L225 Difference]: With dead ends: 2097 [2021-06-12 22:05:23,321 INFO L226 Difference]: Without dead ends: 2097 [2021-06-12 22:05:23,321 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:05:23,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-12 22:05:23,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-12 22:05:23,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:23,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-12 22:05:23,338 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-12 22:05:23,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:23,338 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-12 22:05:23,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:23,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-12 22:05:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:23,339 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:23,339 INFO L472 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] [2021-06-12 22:05:23,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:23,553 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:23,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:23,553 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-06-12 22:05:23,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:23,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343043716] [2021-06-12 22:05:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:23,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:23,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343043716] [2021-06-12 22:05:23,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343043716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:23,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37768526] [2021-06-12 22:05:23,581 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 [2021-06-12 22:05:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:23,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:23,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:23,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37768526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:23,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:23,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:05:23,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039291346] [2021-06-12 22:05:23,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:05:23,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:23,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:05:23,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:05:23,663 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:23,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:23,919 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-12 22:05:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:05:23,919 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:23,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:23,921 INFO L225 Difference]: With dead ends: 1963 [2021-06-12 22:05:23,921 INFO L226 Difference]: Without dead ends: 1959 [2021-06-12 22:05:23,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:05:23,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-12 22:05:23,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-12 22:05:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:23,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-12 22:05:23,937 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-12 22:05:23,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:23,937 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-12 22:05:23,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:23,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-12 22:05:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:23,938 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:23,938 INFO L472 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] [2021-06-12 22:05:24,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:24,139 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:24,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:24,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-06-12 22:05:24,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:24,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464202943] [2021-06-12 22:05:24,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:24,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:24,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464202943] [2021-06-12 22:05:24,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464202943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:24,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302360724] [2021-06-12 22:05:24,165 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 [2021-06-12 22:05:24,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:05:24,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:24,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:24,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:24,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302360724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:24,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:24,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:05:24,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131088512] [2021-06-12 22:05:24,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:05:24,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:24,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:05:24,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:05:24,233 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:24,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:24,413 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-12 22:05:24,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:05:24,413 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:24,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:24,415 INFO L225 Difference]: With dead ends: 1728 [2021-06-12 22:05:24,415 INFO L226 Difference]: Without dead ends: 1716 [2021-06-12 22:05:24,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:05:24,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-12 22:05:24,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-12 22:05:24,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-12 22:05:24,429 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-12 22:05:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:24,429 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-12 22:05:24,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:24,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-12 22:05:24,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:24,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:24,431 INFO L472 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] [2021-06-12 22:05:24,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:24,637 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:24,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:24,637 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-06-12 22:05:24,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:24,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891885624] [2021-06-12 22:05:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:24,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:24,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891885624] [2021-06-12 22:05:24,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891885624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:24,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320325198] [2021-06-12 22:05:24,686 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 [2021-06-12 22:05:24,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:05:24,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:24,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:24,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:24,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320325198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:24,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:24,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:05:24,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597523512] [2021-06-12 22:05:24,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:05:24,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:24,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:05:24,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:05:24,791 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:25,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:25,109 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-12 22:05:25,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:05:25,113 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-12 22:05:25,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:25,115 INFO L225 Difference]: With dead ends: 1821 [2021-06-12 22:05:25,115 INFO L226 Difference]: Without dead ends: 1821 [2021-06-12 22:05:25,115 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:05:25,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-12 22:05:25,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-12 22:05:25,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:25,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-12 22:05:25,130 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-12 22:05:25,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:25,131 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-12 22:05:25,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:25,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-12 22:05:25,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:25,132 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:25,132 INFO L472 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] [2021-06-12 22:05:25,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:25,333 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:25,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:25,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-06-12 22:05:25,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:25,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047610608] [2021-06-12 22:05:25,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:25,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:25,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047610608] [2021-06-12 22:05:25,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047610608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:25,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436995606] [2021-06-12 22:05:25,370 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 [2021-06-12 22:05:25,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:05:25,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:25,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:25,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:25,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436995606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:25,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:25,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:05:25,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851774038] [2021-06-12 22:05:25,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:05:25,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:25,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:05:25,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:05:25,461 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:25,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:25,699 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-12 22:05:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:05:25,699 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-12 22:05:25,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:25,702 INFO L225 Difference]: With dead ends: 1790 [2021-06-12 22:05:25,702 INFO L226 Difference]: Without dead ends: 1786 [2021-06-12 22:05:25,702 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:05:25,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-12 22:05:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-12 22:05:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-12 22:05:25,717 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-12 22:05:25,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:25,717 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-12 22:05:25,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:25,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-12 22:05:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:05:25,719 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:25,719 INFO L472 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] [2021-06-12 22:05:25,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-12 22:05:25,919 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:25,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:25,919 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-06-12 22:05:25,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:25,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166229404] [2021-06-12 22:05:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:25,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:25,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166229404] [2021-06-12 22:05:25,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166229404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:25,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14927254] [2021-06-12 22:05:25,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:25,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:05:25,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:25,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:05:25,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:26,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14927254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:26,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:26,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:05:26,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295107035] [2021-06-12 22:05:26,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:05:26,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:26,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:05:26,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:05:26,034 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:26,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:26,185 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-12 22:05:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:05:26,185 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:05:26,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:26,187 INFO L225 Difference]: With dead ends: 1649 [2021-06-12 22:05:26,187 INFO L226 Difference]: Without dead ends: 1637 [2021-06-12 22:05:26,187 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:05:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-12 22:05:26,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-12 22:05:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:26,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-12 22:05:26,202 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-12 22:05:26,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:26,202 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-12 22:05:26,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:26,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-12 22:05:26,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:05:26,204 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:26,204 INFO L472 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] [2021-06-12 22:05:26,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:26,421 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:26,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:26,421 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-06-12 22:05:26,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:26,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061476945] [2021-06-12 22:05:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:26,700 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-06-12 22:05:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:27,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:27,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061476945] [2021-06-12 22:05:27,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061476945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:27,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130662845] [2021-06-12 22:05:27,030 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 [2021-06-12 22:05:27,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:05:27,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:27,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:05:27,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:27,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:27,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:05:27,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:27,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:27,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:05:27,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:27,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:27,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:05:27,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:27,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:27,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:05:27,493 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:27,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:27,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:05:27,501 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:27,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:27,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:05:27,507 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:27,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:27,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-12 22:05:27,514 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:27,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:27,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:05:27,520 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:27,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:27,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:05:27,526 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:27,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:27,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:05:27,531 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:27,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:27,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:05:27,537 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:27,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:27,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:05:27,544 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:27,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:27,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:05:27,549 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:27,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:27,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:05:27,554 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:27,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:27,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:27,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:05:27,558 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:27,633 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-12 22:05:27,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:05:27,638 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-12 22:05:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:27,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130662845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:27,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:27,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:05:27,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574096934] [2021-06-12 22:05:27,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:05:27,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:27,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:05:27,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:05:27,701 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:05:28,293 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-06-12 22:05:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:28,543 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-12 22:05:28,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:05:28,543 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:05:28,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:28,545 INFO L225 Difference]: With dead ends: 1517 [2021-06-12 22:05:28,545 INFO L226 Difference]: Without dead ends: 1502 [2021-06-12 22:05:28,545 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1270.1ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:05:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-12 22:05:28,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-12 22:05:28,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:28,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-12 22:05:28,558 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-12 22:05:28,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:28,559 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-12 22:05:28,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:05:28,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-12 22:05:28,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:05:28,560 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:28,560 INFO L472 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] [2021-06-12 22:05:28,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-12 22:05:28,767 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:28,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:28,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-06-12 22:05:28,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:28,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965542613] [2021-06-12 22:05:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:29,065 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-12 22:05:29,406 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-06-12 22:05:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:29,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:29,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965542613] [2021-06-12 22:05:29,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965542613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:29,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834360091] [2021-06-12 22:05:29,460 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 [2021-06-12 22:05:29,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:05:29,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:29,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:05:29,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:29,934 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-12 22:05:29,998 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_5, v_prenex_7], 3=[v_prenex_9, A]} [2021-06-12 22:05:30,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:30,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:30,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:30,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:05:30,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:30,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:30,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:30,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:05:30,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:30,124 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-12 22:05:30,124 INFO L628 ElimStorePlain]: treesize reduction 119, result has 50.4 percent of original size [2021-06-12 22:05:30,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:30,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:30,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:05:30,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:30,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:30,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:30,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 22:05:30,171 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:30,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:30,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:30,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:05:30,213 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:30,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:30,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:05:30,247 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:281, output treesize:56 [2021-06-12 22:05:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:30,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834360091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:30,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:30,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:05:30,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675107007] [2021-06-12 22:05:30,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:05:30,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:30,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:05:30,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:05:30,318 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:05:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:31,107 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-06-12 22:05:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:05:31,107 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:05:31,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:31,109 INFO L225 Difference]: With dead ends: 1495 [2021-06-12 22:05:31,109 INFO L226 Difference]: Without dead ends: 1480 [2021-06-12 22:05:31,109 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1507.2ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:05:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-06-12 22:05:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-06-12 22:05:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-12 22:05:31,123 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-12 22:05:31,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:31,123 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-12 22:05:31,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:05:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-12 22:05:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:05:31,124 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:31,124 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:31,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:31,325 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:31,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:31,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-06-12 22:05:31,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:31,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643884264] [2021-06-12 22:05:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:31,639 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-12 22:05:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:31,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:31,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643884264] [2021-06-12 22:05:31,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643884264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:31,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507783401] [2021-06-12 22:05:31,861 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 [2021-06-12 22:05:31,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:05:31,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:31,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:05:31,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:32,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,423 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 41 treesize of output 16 [2021-06-12 22:05:32,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:32,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,433 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 35 treesize of output 19 [2021-06-12 22:05:32,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:32,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,441 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 39 treesize of output 19 [2021-06-12 22:05:32,442 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:32,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,449 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 34 treesize of output 16 [2021-06-12 22:05:32,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:32,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,457 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 28 treesize of output 13 [2021-06-12 22:05:32,458 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:32,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,465 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 35 treesize of output 19 [2021-06-12 22:05:32,466 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:32,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,476 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 39 treesize of output 13 [2021-06-12 22:05:32,485 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:32,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,493 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 28 treesize of output 13 [2021-06-12 22:05:32,494 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:32,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:05:32,502 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:32,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,509 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 30 treesize of output 16 [2021-06-12 22:05:32,510 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:32,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,518 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 39 treesize of output 16 [2021-06-12 22:05:32,519 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:32,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 22:05:32,527 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:32,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,534 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 33 treesize of output 13 [2021-06-12 22:05:32,536 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:32,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,542 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 32 treesize of output 16 [2021-06-12 22:05:32,542 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:32,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:32,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:32,549 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 30 treesize of output 16 [2021-06-12 22:05:32,550 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:32,573 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-06-12 22:05:32,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:05:32,574 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-12 22:05:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:32,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507783401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:32,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:32,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:05:32,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255896358] [2021-06-12 22:05:32,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:05:32,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:32,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:05:32,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:05:32,616 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 22:05:33,541 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 40 [2021-06-12 22:05:34,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:34,034 INFO L93 Difference]: Finished difference Result 1607 states and 5192 transitions. [2021-06-12 22:05:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:05:34,034 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:05:34,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:34,036 INFO L225 Difference]: With dead ends: 1607 [2021-06-12 22:05:34,036 INFO L226 Difference]: Without dead ends: 1592 [2021-06-12 22:05:34,037 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1745.7ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:05:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-06-12 22:05:34,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1180. [2021-06-12 22:05:34,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-12 22:05:34,051 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-12 22:05:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:34,051 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-12 22:05:34,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 22:05:34,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-12 22:05:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:05:34,053 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:34,053 INFO L472 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] [2021-06-12 22:05:34,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-12 22:05:34,253 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:34,254 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-06-12 22:05:34,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:34,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182383888] [2021-06-12 22:05:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:34,507 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-12 22:05:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:34,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:34,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182383888] [2021-06-12 22:05:34,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182383888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:34,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632037402] [2021-06-12 22:05:34,815 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:34,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:05:34,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:34,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:05:34,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:35,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:35,111 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:05:35,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:05:35,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:35,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:35,120 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:05:35,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:05:35,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:35,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:35,129 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:05:35,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:05:35,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:35,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:35,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:35,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:05:35,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:35,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:35,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:35,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:05:35,159 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:35,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:35,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:35,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:05:35,170 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:35,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:35,178 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:05:35,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:05:35,178 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:35,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:35,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:35,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:05:35,190 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:35,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:35,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:35,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:05:35,212 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:35,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:35,222 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:05:35,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:05:35,222 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:35,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:35,231 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:05:35,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:05:35,232 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:35,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:35,239 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:05:35,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:05:35,240 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:35,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:35,250 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:05:35,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:05:35,252 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:35,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:35,263 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:05:35,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:05:35,265 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:35,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:35,278 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:05:35,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:05:35,280 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:35,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:35,285 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:05:35,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:05:35,286 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:35,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:35,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:05:35,353 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-12 22:05:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:35,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632037402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:35,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:35,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:05:35,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922212465] [2021-06-12 22:05:35,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:05:35,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:35,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:05:35,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:05:35,540 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:35,890 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-12 22:05:36,565 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-06-12 22:05:37,082 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-06-12 22:05:37,242 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-12 22:05:37,437 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-06-12 22:05:37,711 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2021-06-12 22:05:37,853 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-12 22:05:38,131 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-12 22:05:38,418 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-12 22:05:38,670 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2021-06-12 22:05:38,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:38,718 INFO L93 Difference]: Finished difference Result 1842 states and 5907 transitions. [2021-06-12 22:05:38,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:05:38,719 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-06-12 22:05:38,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:38,721 INFO L225 Difference]: With dead ends: 1842 [2021-06-12 22:05:38,721 INFO L226 Difference]: Without dead ends: 1827 [2021-06-12 22:05:38,722 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 3347.0ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:05:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-06-12 22:05:38,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1198. [2021-06-12 22:05:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:38,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-06-12 22:05:38,738 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-06-12 22:05:38,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:38,738 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-06-12 22:05:38,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:38,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-06-12 22:05:38,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:05:38,740 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:38,740 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:38,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:38,940 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:38,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:38,941 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-06-12 22:05:38,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:38,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262569915] [2021-06-12 22:05:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:39,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:39,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262569915] [2021-06-12 22:05:39,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262569915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:39,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157292258] [2021-06-12 22:05:39,325 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:39,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:05:39,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:39,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,909 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 41 treesize of output 19 [2021-06-12 22:05:39,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:39,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,917 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 25 treesize of output 7 [2021-06-12 22:05:39,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:39,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:05:39,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:39,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 22:05:39,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:39,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,941 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 39 treesize of output 19 [2021-06-12 22:05:39,942 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:39,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,952 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 43 treesize of output 19 [2021-06-12 22:05:39,952 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:39,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-06-12 22:05:39,961 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:39,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:05:39,970 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:39,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,978 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 30 treesize of output 13 [2021-06-12 22:05:39,978 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:39,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,987 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 32 treesize of output 13 [2021-06-12 22:05:39,987 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:39,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:39,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:39,998 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 34 treesize of output 16 [2021-06-12 22:05:39,998 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:40,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:40,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:40,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,009 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 43 treesize of output 13 [2021-06-12 22:05:40,010 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:40,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:40,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:40,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,017 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 34 treesize of output 16 [2021-06-12 22:05:40,018 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:40,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:40,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:40,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-06-12 22:05:40,028 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:40,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:40,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:40,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,035 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 36 treesize of output 16 [2021-06-12 22:05:40,035 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:40,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:40,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:40,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:40,041 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 43 treesize of output 13 [2021-06-12 22:05:40,042 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:40,073 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-06-12 22:05:40,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:05:40,074 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-06-12 22:05:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:40,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157292258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:40,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:40,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:05:40,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523680772] [2021-06-12 22:05:40,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:05:40,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:40,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:05:40,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:05:40,120 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:41,151 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2021-06-12 22:05:41,300 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 56 [2021-06-12 22:05:41,475 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-06-12 22:05:41,611 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2021-06-12 22:05:42,044 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2021-06-12 22:05:42,484 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-06-12 22:05:42,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:42,597 INFO L93 Difference]: Finished difference Result 1797 states and 5747 transitions. [2021-06-12 22:05:42,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:05:42,597 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:05:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:42,600 INFO L225 Difference]: With dead ends: 1797 [2021-06-12 22:05:42,600 INFO L226 Difference]: Without dead ends: 1782 [2021-06-12 22:05:42,600 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 2559.5ms TimeCoverageRelationStatistics Valid=356, Invalid=1624, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:05:42,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-06-12 22:05:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1206. [2021-06-12 22:05:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-06-12 22:05:42,614 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-06-12 22:05:42,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:42,615 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-06-12 22:05:42,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:42,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-06-12 22:05:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:05:42,616 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:42,616 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:42,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-12 22:05:42,817 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:42,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:42,817 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-06-12 22:05:42,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:42,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308681368] [2021-06-12 22:05:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:43,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:43,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308681368] [2021-06-12 22:05:43,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308681368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:43,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007036900] [2021-06-12 22:05:43,318 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:43,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:05:43,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:43,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:05:43,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:43,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:44,010 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-12 22:05:44,010 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 51 [2021-06-12 22:05:44,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:44,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:44,063 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-12 22:05:44,064 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 51 [2021-06-12 22:05:44,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:44,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:44,090 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:05:44,090 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:05:44,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:44,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:44,130 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:05:44,131 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-06-12 22:05:44,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:44,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:44,179 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:05:44,179 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-06-12 22:05:44,187 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:44,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:44,224 INFO L354 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2021-06-12 22:05:44,225 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 42 [2021-06-12 22:05:44,227 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:44,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:44,253 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:05:44,253 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:05:44,254 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:44,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:44,303 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-12 22:05:44,303 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 55 [2021-06-12 22:05:44,313 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:44,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:44,333 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:05:44,333 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:05:44,334 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:44,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:44,374 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:05:44,374 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2021-06-12 22:05:44,380 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:44,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:44,423 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:05:44,423 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-06-12 22:05:44,433 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:44,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:44,460 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:05:44,460 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:05:44,461 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:44,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:44,479 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:05:44,479 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-06-12 22:05:44,480 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:44,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:44,498 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:05:44,498 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:05:44,499 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:44,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:44,543 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-12 22:05:44,543 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-12 22:05:44,567 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:44,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:44,579 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:05:44,579 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 22:05:44,580 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:44,876 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-12 22:05:44,877 INFO L628 ElimStorePlain]: treesize reduction 109, result has 76.9 percent of original size [2021-06-12 22:05:44,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:05:44,891 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:993, output treesize:437 [2021-06-12 22:05:45,150 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-06-12 22:05:45,307 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-06-12 22:05:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:45,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007036900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:45,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:45,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 22:05:45,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170879566] [2021-06-12 22:05:45,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:05:45,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:45,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:05:45,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:05:45,351 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:46,882 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 59 [2021-06-12 22:05:47,019 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-12 22:05:47,195 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-06-12 22:05:47,633 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2021-06-12 22:05:48,159 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2021-06-12 22:05:48,517 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 74 [2021-06-12 22:05:48,661 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-06-12 22:05:48,810 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-06-12 22:05:49,191 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 67 [2021-06-12 22:05:49,544 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 68 [2021-06-12 22:05:49,737 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 46 [2021-06-12 22:05:49,990 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-06-12 22:05:50,192 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-12 22:05:50,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:50,416 INFO L93 Difference]: Finished difference Result 2305 states and 7128 transitions. [2021-06-12 22:05:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:05:50,416 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 26 [2021-06-12 22:05:50,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:50,419 INFO L225 Difference]: With dead ends: 2305 [2021-06-12 22:05:50,419 INFO L226 Difference]: Without dead ends: 2260 [2021-06-12 22:05:50,420 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 5471.3ms TimeCoverageRelationStatistics Valid=600, Invalid=2940, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:05:50,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-06-12 22:05:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 1349. [2021-06-12 22:05:50,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.306379821958457) internal successors, (4457), 1348 states have internal predecessors, (4457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:50,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4457 transitions. [2021-06-12 22:05:50,438 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4457 transitions. Word has length 26 [2021-06-12 22:05:50,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:50,438 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4457 transitions. [2021-06-12 22:05:50,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:50,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4457 transitions. [2021-06-12 22:05:50,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:05:50,440 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:50,440 INFO L472 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] [2021-06-12 22:05:50,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:50,640 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:50,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-06-12 22:05:50,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:50,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593286526] [2021-06-12 22:05:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:51,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:51,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593286526] [2021-06-12 22:05:51,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593286526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:51,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292999779] [2021-06-12 22:05:51,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:51,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:05:51,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:51,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:51,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:05:51,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:51,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:51,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:05:51,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:51,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:51,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:05:51,470 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:51,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:51,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:05:51,476 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:51,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:51,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:05:51,481 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:51,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:05:51,487 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:51,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:51,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:05:51,492 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:51,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:51,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:05:51,497 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:51,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:51,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:05:51,503 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:51,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:51,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:05:51,509 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:51,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:51,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:05:51,516 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:51,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:51,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:05:51,521 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:51,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:51,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-12 22:05:51,527 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:51,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:51,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:05:51,534 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:51,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:51,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:51,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:05:51,538 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:51,607 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-12 22:05:51,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:05:51,610 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-12 22:05:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:51,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292999779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:51,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:51,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:05:51,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47449393] [2021-06-12 22:05:51,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:05:51,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:51,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:05:51,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:05:51,657 INFO L87 Difference]: Start difference. First operand 1349 states and 4457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:05:52,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:52,639 INFO L93 Difference]: Finished difference Result 1744 states and 5646 transitions. [2021-06-12 22:05:52,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:05:52,639 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:05:52,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:52,642 INFO L225 Difference]: With dead ends: 1744 [2021-06-12 22:05:52,642 INFO L226 Difference]: Without dead ends: 1729 [2021-06-12 22:05:52,642 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1252.8ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:05:52,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-06-12 22:05:52,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1360. [2021-06-12 22:05:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 3.3038999264164826) internal successors, (4490), 1359 states have internal predecessors, (4490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 4490 transitions. [2021-06-12 22:05:52,658 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 4490 transitions. Word has length 26 [2021-06-12 22:05:52,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:52,658 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 4490 transitions. [2021-06-12 22:05:52,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:05:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 4490 transitions. [2021-06-12 22:05:52,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:05:52,659 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:52,660 INFO L472 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] [2021-06-12 22:05:52,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-12 22:05:52,872 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:52,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:52,873 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-06-12 22:05:52,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:52,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673995754] [2021-06-12 22:05:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:53,447 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-06-12 22:05:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:53,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:53,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673995754] [2021-06-12 22:05:53,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673995754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:53,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701417965] [2021-06-12 22:05:53,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:53,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:05:53,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:53,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:05:53,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:53,856 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-12 22:05:53,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:53,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:53,984 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-12 22:05:53,984 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 22 [2021-06-12 22:05:53,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:53,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:53,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:54,011 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 22:05:54,011 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-06-12 22:05:54,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:54,381 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 130 [2021-06-12 22:05:54,382 INFO L628 ElimStorePlain]: treesize reduction 403, result has 46.9 percent of original size [2021-06-12 22:05:54,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:54,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:05:54,403 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:54,526 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-12 22:05:54,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:54,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:54,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:54,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:54,546 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-06-12 22:05:54,548 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:54,673 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-12 22:05:54,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:54,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:54,696 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 22:05:54,696 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-12 22:05:54,701 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:54,825 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-12 22:05:54,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:54,842 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:05:54,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:05:54,847 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:54,963 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-12 22:05:54,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:54,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:54,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:05:54,981 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-12 22:05:54,981 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:05:54,983 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:55,117 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-12 22:05:55,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:55,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:05:55,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:55,133 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-06-12 22:05:55,134 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:55,252 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-12 22:05:55,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:55,268 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:05:55,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:05:55,272 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:05:55,382 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-12 22:05:55,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:05:55,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:05:55,398 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:825, output treesize:551 [2021-06-12 22:05:55,657 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-12 22:05:55,849 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-06-12 22:05:55,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:55,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701417965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:55,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:55,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:05:55,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745652312] [2021-06-12 22:05:55,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:05:55,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:55,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:05:55,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:05:55,954 INFO L87 Difference]: Start difference. First operand 1360 states and 4490 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:56,876 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2021-06-12 22:05:57,226 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2021-06-12 22:05:57,462 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 46 [2021-06-12 22:05:57,766 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 59 [2021-06-12 22:05:58,094 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-12 22:05:58,559 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-06-12 22:05:58,975 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-06-12 22:05:59,330 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-06-12 22:05:59,475 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-06-12 22:05:59,720 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-06-12 22:06:00,048 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-06-12 22:06:00,459 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-06-12 22:06:00,677 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-06-12 22:06:01,164 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 74 [2021-06-12 22:06:01,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:06:01,251 INFO L93 Difference]: Finished difference Result 2016 states and 6372 transitions. [2021-06-12 22:06:01,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:06:01,251 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-06-12 22:06:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:06:01,254 INFO L225 Difference]: With dead ends: 2016 [2021-06-12 22:06:01,254 INFO L226 Difference]: Without dead ends: 2001 [2021-06-12 22:06:01,255 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 5806.8ms TimeCoverageRelationStatistics Valid=329, Invalid=1833, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:06:01,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2021-06-12 22:06:01,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1371. [2021-06-12 22:06:01,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 3.3124087591240876) internal successors, (4538), 1370 states have internal predecessors, (4538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 4538 transitions. [2021-06-12 22:06:01,272 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 4538 transitions. Word has length 26 [2021-06-12 22:06:01,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:06:01,273 INFO L482 AbstractCegarLoop]: Abstraction has 1371 states and 4538 transitions. [2021-06-12 22:06:01,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:01,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 4538 transitions. [2021-06-12 22:06:01,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:06:01,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:06:01,274 INFO L472 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] [2021-06-12 22:06:01,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-06-12 22:06:01,475 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:06:01,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:06:01,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-06-12 22:06:01,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:06:01,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109237953] [2021-06-12 22:06:01,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:06:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:01,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:06:01,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109237953] [2021-06-12 22:06:01,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109237953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:01,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102027661] [2021-06-12 22:06:01,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:01,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:06:01,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:06:01,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:06:01,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:06:02,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:02,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:02,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:02,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:02,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:02,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:02,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:02,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:06:02,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:02,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:02,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:02,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:02,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:02,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:02,244 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:02,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:02,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:06:02,251 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:02,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:02,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:02,258 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:02,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:02,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:02,264 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:02,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:02,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:02,270 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:02,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:02,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:02,276 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:02,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:02,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:06:02,282 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:02,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:02,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:06:02,287 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:02,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:02,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-12 22:06:02,293 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:02,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:02,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:06:02,298 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:02,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:02,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:02,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:06:02,302 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:02,371 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-12 22:06:02,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:06:02,372 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-12 22:06:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:02,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102027661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:02,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:06:02,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:06:02,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579646265] [2021-06-12 22:06:02,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:06:02,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:06:02,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:06:02,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:06:02,420 INFO L87 Difference]: Start difference. First operand 1371 states and 4538 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:06:03,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:06:03,621 INFO L93 Difference]: Finished difference Result 1859 states and 6002 transitions. [2021-06-12 22:06:03,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:06:03,621 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:06:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:06:03,623 INFO L225 Difference]: With dead ends: 1859 [2021-06-12 22:06:03,623 INFO L226 Difference]: Without dead ends: 1844 [2021-06-12 22:06:03,623 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1395.2ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:06:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-06-12 22:06:03,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1380. [2021-06-12 22:06:03,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:03,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-06-12 22:06:03,639 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-06-12 22:06:03,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:06:03,639 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-06-12 22:06:03,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:06:03,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-06-12 22:06:03,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:06:03,641 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:06:03,641 INFO L472 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] [2021-06-12 22:06:03,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:03,842 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:06:03,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:06:03,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-06-12 22:06:03,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:06:03,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068625457] [2021-06-12 22:06:03,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:06:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:04,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:06:04,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068625457] [2021-06-12 22:06:04,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068625457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:04,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542614188] [2021-06-12 22:06:04,323 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 [2021-06-12 22:06:04,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:06:04,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:06:04,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:06:04,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:06:04,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:04,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:04,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:04,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:04,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:04,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:04,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:04,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:06:04,687 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:04,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:04,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:04,692 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:04,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:04,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:06:04,698 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:04,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:04,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:06:04,703 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:04,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:04,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:06:04,709 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:04,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:04,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:04,714 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:04,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:04,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:06:04,719 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:04,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:04,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:04,724 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:04,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:04,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:04,729 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:04,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:04,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:06:04,735 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:04,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:04,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:04,739 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:04,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:04,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:04,744 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:04,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:04,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:04,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-12 22:06:04,748 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:04,823 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-12 22:06:04,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:06:04,825 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-12 22:06:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:04,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542614188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:04,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:06:04,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:06:04,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986311270] [2021-06-12 22:06:04,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:06:04,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:06:04,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:06:04,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:06:04,880 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:05,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:06:05,517 INFO L93 Difference]: Finished difference Result 1722 states and 5631 transitions. [2021-06-12 22:06:05,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:06:05,517 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:06:05,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:06:05,520 INFO L225 Difference]: With dead ends: 1722 [2021-06-12 22:06:05,520 INFO L226 Difference]: Without dead ends: 1707 [2021-06-12 22:06:05,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1004.1ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:06:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-06-12 22:06:05,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1380. [2021-06-12 22:06:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-06-12 22:06:05,535 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-06-12 22:06:05,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:06:05,535 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-06-12 22:06:05,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:05,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-06-12 22:06:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:06:05,537 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:06:05,537 INFO L472 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] [2021-06-12 22:06:05,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-06-12 22:06:05,738 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:06:05,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:06:05,738 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-06-12 22:06:05,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:06:05,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030019907] [2021-06-12 22:06:05,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:06:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:06,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:06:06,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030019907] [2021-06-12 22:06:06,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030019907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:06,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603271461] [2021-06-12 22:06:06,103 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 [2021-06-12 22:06:06,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:06:06,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:06:06,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:06:06,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:06:06,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:06,456 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:06:06,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:06:06,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:06,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:06,465 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:06,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:06,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:06,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:06,476 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:06:06,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:06:06,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:06,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:06,486 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:06,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:06,486 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:06,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:06,494 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:06,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:06,494 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:06,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:06,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:06,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:06:06,506 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:06,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:06,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:06,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:06:06,519 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:06,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:06,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:06,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:06:06,532 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:06,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:06,540 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:06,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:06:06,541 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:06,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:06,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:06,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:06:06,554 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:06,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:06,562 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:06,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:06,563 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:06,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:06,571 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:06,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:06:06,572 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:06,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:06,582 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:06:06,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:06:06,583 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:06,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:06,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:06,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:06:06,594 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:06,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:06,602 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:06,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:06:06,603 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:06,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:06,608 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:06,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:06:06,608 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:06,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:06,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:06:06,689 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-06-12 22:06:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:06,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603271461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:06,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:06:06,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:06:06,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158989167] [2021-06-12 22:06:06,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:06:06,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:06:06,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:06:06,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:06:06,882 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:07,967 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2021-06-12 22:06:08,363 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2021-06-12 22:06:09,223 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-12 22:06:09,541 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-06-12 22:06:09,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:06:09,686 INFO L93 Difference]: Finished difference Result 2174 states and 6962 transitions. [2021-06-12 22:06:09,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:06:09,686 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-06-12 22:06:09,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:06:09,689 INFO L225 Difference]: With dead ends: 2174 [2021-06-12 22:06:09,689 INFO L226 Difference]: Without dead ends: 2144 [2021-06-12 22:06:09,689 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2757.7ms TimeCoverageRelationStatistics Valid=323, Invalid=1569, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:06:09,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-06-12 22:06:09,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1380. [2021-06-12 22:06:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:09,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-06-12 22:06:09,707 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-06-12 22:06:09,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:06:09,707 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-06-12 22:06:09,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:09,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-06-12 22:06:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:06:09,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:06:09,709 INFO L472 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] [2021-06-12 22:06:09,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-12 22:06:09,909 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:06:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:06:09,910 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-06-12 22:06:09,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:06:09,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513174578] [2021-06-12 22:06:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:06:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:10,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:06:10,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513174578] [2021-06-12 22:06:10,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513174578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:10,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027968803] [2021-06-12 22:06:10,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:10,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:06:10,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:06:10,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:06:10,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:06:10,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:10,587 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:10,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:06:10,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:10,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:10,595 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:10,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:06:10,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:10,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:10,603 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:10,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:10,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:10,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:10,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:10,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:06:10,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:10,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:10,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:10,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:06:10,628 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:10,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:10,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:10,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:06:10,645 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:10,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:10,653 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:10,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:10,654 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:10,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:10,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:10,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:06:10,664 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:10,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:10,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:10,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:06:10,678 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:10,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:10,686 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:10,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:06:10,687 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:10,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:10,695 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:10,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:10,695 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:10,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:10,703 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:10,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:10,703 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:10,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:10,713 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:06:10,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:06:10,715 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:10,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:10,724 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:06:10,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:06:10,726 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:10,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:10,735 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:06:10,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:06:10,736 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:10,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:10,741 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:10,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:06:10,742 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:10,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:10,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:06:10,809 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-12 22:06:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:10,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027968803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:10,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:06:10,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:06:10,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404412660] [2021-06-12 22:06:10,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:06:10,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:06:10,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:06:10,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:06:10,988 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:11,417 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2021-06-12 22:06:12,575 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-06-12 22:06:12,927 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2021-06-12 22:06:13,071 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-12 22:06:13,345 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-06-12 22:06:13,713 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-06-12 22:06:13,989 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2021-06-12 22:06:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:06:14,044 INFO L93 Difference]: Finished difference Result 1982 states and 6430 transitions. [2021-06-12 22:06:14,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:06:14,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-06-12 22:06:14,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:06:14,047 INFO L225 Difference]: With dead ends: 1982 [2021-06-12 22:06:14,047 INFO L226 Difference]: Without dead ends: 1967 [2021-06-12 22:06:14,047 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 3189.6ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:06:14,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-06-12 22:06:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1380. [2021-06-12 22:06:14,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-06-12 22:06:14,065 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-06-12 22:06:14,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:06:14,066 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-06-12 22:06:14,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:14,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-06-12 22:06:14,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:06:14,067 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:06:14,068 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:06:14,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-06-12 22:06:14,268 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:06:14,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:06:14,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-06-12 22:06:14,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:06:14,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870333669] [2021-06-12 22:06:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:06:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:14,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:06:14,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870333669] [2021-06-12 22:06:14,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870333669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:14,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114654768] [2021-06-12 22:06:14,731 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:14,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:06:14,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:06:14,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:06:14,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:06:15,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,294 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 35 treesize of output 19 [2021-06-12 22:06:15,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:15,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,304 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 33 treesize of output 13 [2021-06-12 22:06:15,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:15,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,313 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 39 treesize of output 19 [2021-06-12 22:06:15,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:15,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,321 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 28 treesize of output 13 [2021-06-12 22:06:15,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:15,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,329 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 32 treesize of output 16 [2021-06-12 22:06:15,330 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:15,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,337 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 35 treesize of output 19 [2021-06-12 22:06:15,338 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:15,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,345 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 41 treesize of output 13 [2021-06-12 22:06:15,346 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:15,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,354 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 41 treesize of output 16 [2021-06-12 22:06:15,354 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:15,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,362 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 28 treesize of output 13 [2021-06-12 22:06:15,363 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:15,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,370 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 39 treesize of output 16 [2021-06-12 22:06:15,371 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:15,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:06:15,379 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:15,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,385 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 30 treesize of output 16 [2021-06-12 22:06:15,386 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:15,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,393 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 39 treesize of output 13 [2021-06-12 22:06:15,394 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:15,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,400 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 34 treesize of output 16 [2021-06-12 22:06:15,400 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:15,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:15,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:15,404 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 30 treesize of output 16 [2021-06-12 22:06:15,405 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:15,428 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-06-12 22:06:15,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:06:15,429 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-12 22:06:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:15,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114654768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:15,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:06:15,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 22:06:15,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459820937] [2021-06-12 22:06:15,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:06:15,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:06:15,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:06:15,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:06:15,464 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:16,291 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-06-12 22:06:16,787 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-06-12 22:06:17,054 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-06-12 22:06:17,198 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-12 22:06:17,630 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2021-06-12 22:06:18,722 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2021-06-12 22:06:19,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:06:19,374 INFO L93 Difference]: Finished difference Result 3227 states and 9972 transitions. [2021-06-12 22:06:19,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:06:19,374 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:06:19,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:06:19,378 INFO L225 Difference]: With dead ends: 3227 [2021-06-12 22:06:19,378 INFO L226 Difference]: Without dead ends: 3182 [2021-06-12 22:06:19,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 3841.5ms TimeCoverageRelationStatistics Valid=669, Invalid=3363, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:06:19,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-06-12 22:06:19,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 1395. [2021-06-12 22:06:19,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 3.33142037302726) internal successors, (4644), 1394 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:19,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 4644 transitions. [2021-06-12 22:06:19,402 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 4644 transitions. Word has length 26 [2021-06-12 22:06:19,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:06:19,402 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 4644 transitions. [2021-06-12 22:06:19,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:19,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 4644 transitions. [2021-06-12 22:06:19,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:06:19,404 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:06:19,404 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:06:19,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-06-12 22:06:19,605 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:06:19,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:06:19,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-06-12 22:06:19,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:06:19,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352811393] [2021-06-12 22:06:19,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:06:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:20,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:06:20,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352811393] [2021-06-12 22:06:20,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352811393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:20,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487615696] [2021-06-12 22:06:20,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:20,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:06:20,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:06:20,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:06:20,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:06:20,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:20,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,646 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 28 treesize of output 13 [2021-06-12 22:06:20,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:20,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:20,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,653 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 35 treesize of output 19 [2021-06-12 22:06:20,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:20,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:20,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,660 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 28 treesize of output 13 [2021-06-12 22:06:20,660 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:20,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:20,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,666 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 41 treesize of output 13 [2021-06-12 22:06:20,667 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:20,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:20,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,674 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 30 treesize of output 16 [2021-06-12 22:06:20,674 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:20,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:20,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:06:20,681 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:20,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:20,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:06:20,688 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:20,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:20,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,694 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 39 treesize of output 19 [2021-06-12 22:06:20,695 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:20,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:20,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,701 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 32 treesize of output 16 [2021-06-12 22:06:20,702 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:20,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:20,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,709 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 41 treesize of output 16 [2021-06-12 22:06:20,710 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:20,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:20,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,717 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 39 treesize of output 13 [2021-06-12 22:06:20,718 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:20,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:20,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,724 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 35 treesize of output 19 [2021-06-12 22:06:20,725 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:20,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:20,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,732 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 34 treesize of output 16 [2021-06-12 22:06:20,733 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:20,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:20,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,739 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 39 treesize of output 16 [2021-06-12 22:06:20,739 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:20,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:20,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:20,742 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 33 treesize of output 13 [2021-06-12 22:06:20,744 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:20,767 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-06-12 22:06:20,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:06:20,768 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-12 22:06:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:20,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487615696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:20,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:06:20,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 22:06:20,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816799892] [2021-06-12 22:06:20,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:06:20,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:06:20,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:06:20,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:06:20,810 INFO L87 Difference]: Start difference. First operand 1395 states and 4644 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:21,829 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2021-06-12 22:06:22,454 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2021-06-12 22:06:22,618 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-12 22:06:22,882 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-06-12 22:06:23,125 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 22:06:23,304 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2021-06-12 22:06:24,161 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2021-06-12 22:06:24,334 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-06-12 22:06:24,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:06:24,572 INFO L93 Difference]: Finished difference Result 3009 states and 9476 transitions. [2021-06-12 22:06:24,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:06:24,572 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:06:24,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:06:24,576 INFO L225 Difference]: With dead ends: 3009 [2021-06-12 22:06:24,576 INFO L226 Difference]: Without dead ends: 2964 [2021-06-12 22:06:24,576 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3640.9ms TimeCoverageRelationStatistics Valid=601, Invalid=2705, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:06:24,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-06-12 22:06:24,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 1398. [2021-06-12 22:06:24,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.3335719398711525) internal successors, (4657), 1397 states have internal predecessors, (4657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:24,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4657 transitions. [2021-06-12 22:06:24,597 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4657 transitions. Word has length 26 [2021-06-12 22:06:24,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:06:24,598 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4657 transitions. [2021-06-12 22:06:24,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:24,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4657 transitions. [2021-06-12 22:06:24,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:06:24,599 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:06:24,600 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:06:24,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-06-12 22:06:24,800 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:06:24,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:06:24,800 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-06-12 22:06:24,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:06:24,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248912510] [2021-06-12 22:06:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:06:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:25,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:06:25,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248912510] [2021-06-12 22:06:25,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248912510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:25,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223535152] [2021-06-12 22:06:25,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:25,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:06:25,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:06:25,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:06:25,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:06:25,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,735 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-12 22:06:25,735 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 30 treesize of output 34 [2021-06-12 22:06:25,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:25,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,769 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-12 22:06:25,769 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 37 treesize of output 37 [2021-06-12 22:06:25,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:25,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,801 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-06-12 22:06:25,801 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 43 treesize of output 25 [2021-06-12 22:06:25,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:25,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:25,830 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 25 treesize of output 45 [2021-06-12 22:06:25,842 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:25,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,870 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-06-12 22:06:25,871 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 43 treesize of output 25 [2021-06-12 22:06:25,872 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:25,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,891 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 22:06:25,891 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 41 treesize of output 1 [2021-06-12 22:06:25,892 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:25,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,908 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 22:06:25,908 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 37 treesize of output 1 [2021-06-12 22:06:25,908 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:25,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,931 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-06-12 22:06:25,931 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 34 treesize of output 30 [2021-06-12 22:06:25,933 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:25,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,950 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 22:06:25,951 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 43 treesize of output 1 [2021-06-12 22:06:25,951 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:25,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,967 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 22:06:25,967 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 34 treesize of output 1 [2021-06-12 22:06:25,968 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:25,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:25,993 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-12 22:06:25,993 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 32 treesize of output 34 [2021-06-12 22:06:25,997 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:26,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:26,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:26,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:26,013 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 22:06:26,013 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 36 treesize of output 1 [2021-06-12 22:06:26,013 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:26,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:26,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:26,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:26,029 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 22:06:26,029 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 41 treesize of output 1 [2021-06-12 22:06:26,030 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:26,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:26,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:26,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:26,047 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 22:06:26,048 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 45 treesize of output 1 [2021-06-12 22:06:26,048 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:26,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:26,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:26,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:26,063 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 22:06:26,064 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 39 treesize of output 1 [2021-06-12 22:06:26,064 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:26,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:26,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:26,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:26,073 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 22:06:26,074 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 32 treesize of output 1 [2021-06-12 22:06:26,074 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:26,175 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-06-12 22:06:26,175 INFO L628 ElimStorePlain]: treesize reduction 66, result has 65.3 percent of original size [2021-06-12 22:06:26,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:06:26,178 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-06-12 22:06:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:26,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223535152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:26,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:06:26,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 22:06:26,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901478714] [2021-06-12 22:06:26,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:06:26,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:06:26,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:06:26,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:06:26,321 INFO L87 Difference]: Start difference. First operand 1398 states and 4657 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:26,704 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-06-12 22:06:26,866 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-06-12 22:06:26,990 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2021-06-12 22:06:27,321 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-06-12 22:06:27,482 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-06-12 22:06:28,042 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-06-12 22:06:28,522 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-06-12 22:06:28,829 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2021-06-12 22:06:29,013 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 60 [2021-06-12 22:06:29,359 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2021-06-12 22:06:29,595 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2021-06-12 22:06:29,723 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 43 [2021-06-12 22:06:29,968 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2021-06-12 22:06:30,196 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 42 [2021-06-12 22:06:30,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:06:30,835 INFO L93 Difference]: Finished difference Result 3194 states and 9881 transitions. [2021-06-12 22:06:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:06:30,835 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:06:30,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:06:30,839 INFO L225 Difference]: With dead ends: 3194 [2021-06-12 22:06:30,840 INFO L226 Difference]: Without dead ends: 3134 [2021-06-12 22:06:30,840 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 4272.2ms TimeCoverageRelationStatistics Valid=743, Invalid=3039, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:06:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2021-06-12 22:06:30,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 1411. [2021-06-12 22:06:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1410 states have (on average 3.3453900709219857) internal successors, (4717), 1410 states have internal predecessors, (4717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 4717 transitions. [2021-06-12 22:06:30,863 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 4717 transitions. Word has length 26 [2021-06-12 22:06:30,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:06:30,863 INFO L482 AbstractCegarLoop]: Abstraction has 1411 states and 4717 transitions. [2021-06-12 22:06:30,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:30,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 4717 transitions. [2021-06-12 22:06:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:06:30,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:06:30,865 INFO L472 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] [2021-06-12 22:06:31,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable891 [2021-06-12 22:06:31,065 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:06:31,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:06:31,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-06-12 22:06:31,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:06:31,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526786123] [2021-06-12 22:06:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:06:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:31,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:06:31,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526786123] [2021-06-12 22:06:31,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526786123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:31,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304208893] [2021-06-12 22:06:31,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:31,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:06:31,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:06:31,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:31,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-12 22:06:31,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:31,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:31,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:06:31,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:31,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:31,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:31,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:31,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:31,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:31,770 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:31,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:31,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:06:31,775 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:31,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:31,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:06:31,781 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:31,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:31,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:31,790 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:31,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:31,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:31,796 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:31,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:31,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:31,801 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:31,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:31,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:06:31,806 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:31,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:31,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:31,812 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:31,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:31,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:31,817 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:31,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:31,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:06:31,833 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:31,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:31,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:31,839 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:31,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:31,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:31,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:06:31,845 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:31,915 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-12 22:06:31,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:06:31,917 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-12 22:06:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:31,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304208893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:31,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:06:31,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:06:31,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723914842] [2021-06-12 22:06:31,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:06:31,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:06:31,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:06:31,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:06:31,975 INFO L87 Difference]: Start difference. First operand 1411 states and 4717 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:33,023 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-06-12 22:06:33,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:06:33,590 INFO L93 Difference]: Finished difference Result 1958 states and 6368 transitions. [2021-06-12 22:06:33,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:06:33,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-06-12 22:06:33,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:06:33,593 INFO L225 Difference]: With dead ends: 1958 [2021-06-12 22:06:33,593 INFO L226 Difference]: Without dead ends: 1943 [2021-06-12 22:06:33,593 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1711.7ms TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:06:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2021-06-12 22:06:33,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1455. [2021-06-12 22:06:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 3.343878954607978) internal successors, (4862), 1454 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:33,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 4862 transitions. [2021-06-12 22:06:33,610 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 4862 transitions. Word has length 26 [2021-06-12 22:06:33,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:06:33,610 INFO L482 AbstractCegarLoop]: Abstraction has 1455 states and 4862 transitions. [2021-06-12 22:06:33,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:33,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 4862 transitions. [2021-06-12 22:06:33,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:06:33,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:06:33,612 INFO L472 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] [2021-06-12 22:06:33,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable996 [2021-06-12 22:06:33,813 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:06:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:06:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 14 times [2021-06-12 22:06:33,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:06:33,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776876472] [2021-06-12 22:06:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:06:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:34,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:06:34,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776876472] [2021-06-12 22:06:34,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776876472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:34,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505113469] [2021-06-12 22:06:34,123 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:34,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:06:34,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:06:34,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:06:34,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:06:34,496 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-12 22:06:34,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:34,588 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 22:06:34,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-06-12 22:06:34,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:34,720 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-06-12 22:06:34,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:34,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:34,742 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-12 22:06:34,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-06-12 22:06:34,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:34,870 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-12 22:06:34,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:34,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:34,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:34,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-06-12 22:06:34,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:35,013 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-12 22:06:35,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:35,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:35,032 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-12 22:06:35,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-06-12 22:06:35,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:35,151 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-12 22:06:35,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:35,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:35,172 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 22:06:35,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-06-12 22:06:35,176 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:35,303 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-12 22:06:35,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:35,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:35,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:35,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 41 [2021-06-12 22:06:35,324 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:35,449 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-12 22:06:35,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:35,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:35,470 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 22:06:35,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-06-12 22:06:35,472 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:35,596 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-12 22:06:35,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:35,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:35,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:35,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 41 [2021-06-12 22:06:35,613 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:35,730 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 22:06:35,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:35,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:06:35,744 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:445, output treesize:479 [2021-06-12 22:06:36,004 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-06-12 22:06:36,189 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-12 22:06:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:36,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505113469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:36,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:06:36,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:06:36,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451831210] [2021-06-12 22:06:36,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:06:36,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:06:36,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:06:36,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:06:36,273 INFO L87 Difference]: Start difference. First operand 1455 states and 4862 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:37,089 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 36 [2021-06-12 22:06:37,545 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 44 [2021-06-12 22:06:38,031 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-12 22:06:38,445 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-12 22:06:38,650 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-12 22:06:38,913 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-06-12 22:06:39,237 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-06-12 22:06:39,582 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-06-12 22:06:39,818 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2021-06-12 22:06:40,244 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 70 [2021-06-12 22:06:40,454 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 33 [2021-06-12 22:06:40,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:06:40,541 INFO L93 Difference]: Finished difference Result 2081 states and 6658 transitions. [2021-06-12 22:06:40,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:06:40,541 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-06-12 22:06:40,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:06:40,544 INFO L225 Difference]: With dead ends: 2081 [2021-06-12 22:06:40,544 INFO L226 Difference]: Without dead ends: 2051 [2021-06-12 22:06:40,544 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 4507.7ms TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:06:40,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-12 22:06:40,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1451. [2021-06-12 22:06:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1450 states have (on average 3.3393103448275863) internal successors, (4842), 1450 states have internal predecessors, (4842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:40,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 4842 transitions. [2021-06-12 22:06:40,562 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 4842 transitions. Word has length 26 [2021-06-12 22:06:40,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:06:40,562 INFO L482 AbstractCegarLoop]: Abstraction has 1451 states and 4842 transitions. [2021-06-12 22:06:40,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:40,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 4842 transitions. [2021-06-12 22:06:40,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:06:40,564 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:06:40,564 INFO L472 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] [2021-06-12 22:06:40,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1028,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:40,766 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:06:40,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:06:40,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1764992822, now seen corresponding path program 15 times [2021-06-12 22:06:40,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:06:40,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806756644] [2021-06-12 22:06:40,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:06:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:41,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:41,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:06:41,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806756644] [2021-06-12 22:06:41,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806756644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:41,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500849366] [2021-06-12 22:06:41,058 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:41,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:06:41,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:06:41,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:06:41,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:06:41,415 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:06:41,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:06:41,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:41,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:41,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:06:41,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:41,439 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:06:41,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:41,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:41,460 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:06:41,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 22:06:41,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:41,472 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:06:41,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:41,473 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:41,481 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:06:41,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:41,482 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:41,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:41,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:06:41,499 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:41,507 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:06:41,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:06:41,508 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:41,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:41,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:06:41,526 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:41,543 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:06:41,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:06:41,544 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:41,553 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:06:41,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:06:41,553 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:41,571 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:06:41,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:06:41,574 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:41,590 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:06:41,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:06:41,591 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:41,600 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:06:41,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:41,601 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:41,616 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:06:41,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:06:41,618 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:41,624 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:06:41,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:06:41,624 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:41,727 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-06-12 22:06:41,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:41,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:06:41,739 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:769, output treesize:357 [2021-06-12 22:06:41,931 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-12 22:06:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:42,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500849366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:42,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:06:42,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:06:42,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263669852] [2021-06-12 22:06:42,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:06:42,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:06:42,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:06:42,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:06:42,048 INFO L87 Difference]: Start difference. First operand 1451 states and 4842 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:42,607 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2021-06-12 22:06:43,070 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2021-06-12 22:06:43,338 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-12 22:06:43,643 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2021-06-12 22:06:44,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:06:44,573 INFO L93 Difference]: Finished difference Result 2000 states and 6458 transitions. [2021-06-12 22:06:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:06:44,574 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:06:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:06:44,576 INFO L225 Difference]: With dead ends: 2000 [2021-06-12 22:06:44,577 INFO L226 Difference]: Without dead ends: 1985 [2021-06-12 22:06:44,577 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 2498.5ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:06:44,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-06-12 22:06:44,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1452. [2021-06-12 22:06:44,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 3.3418332184700206) internal successors, (4849), 1451 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 4849 transitions. [2021-06-12 22:06:44,594 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 4849 transitions. Word has length 26 [2021-06-12 22:06:44,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:06:44,594 INFO L482 AbstractCegarLoop]: Abstraction has 1452 states and 4849 transitions. [2021-06-12 22:06:44,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:44,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 4849 transitions. [2021-06-12 22:06:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:06:44,596 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:06:44,596 INFO L472 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] [2021-06-12 22:06:44,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1054,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:44,812 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:06:44,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:06:44,812 INFO L82 PathProgramCache]: Analyzing trace with hash 505986546, now seen corresponding path program 16 times [2021-06-12 22:06:44,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:06:44,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589918794] [2021-06-12 22:06:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:06:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:45,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:06:45,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589918794] [2021-06-12 22:06:45,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589918794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:45,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893470279] [2021-06-12 22:06:45,171 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:45,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:06:45,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:06:45,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:06:45,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:06:45,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,421 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:45,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:06:45,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:45,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:45,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-06-12 22:06:45,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:45,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:45,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-06-12 22:06:45,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:45,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,462 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:45,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:06:45,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:45,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,477 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:06:45,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-12 22:06:45,479 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:45,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:45,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-06-12 22:06:45,495 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:45,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:45,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-06-12 22:06:45,512 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:45,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,522 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:45,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:06:45,523 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:45,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,533 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:45,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:06:45,534 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:45,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,543 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:45,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:06:45,544 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:45,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,556 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:06:45,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-06-12 22:06:45,557 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:45,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,567 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:45,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:06:45,568 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:45,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:45,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-06-12 22:06:45,582 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:45,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,592 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:45,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-12 22:06:45,593 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:45,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,603 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:06:45,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:06:45,604 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:45,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:45,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:45,612 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:06:45,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-12 22:06:45,614 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:45,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:45,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:06:45,683 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-06-12 22:06:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:45,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893470279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:45,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:06:45,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:06:45,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343705259] [2021-06-12 22:06:45,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:06:45,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:06:45,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:06:45,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:06:45,886 INFO L87 Difference]: Start difference. First operand 1452 states and 4849 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:46,608 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2021-06-12 22:06:47,142 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 46 [2021-06-12 22:06:47,312 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-06-12 22:06:47,504 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-06-12 22:06:47,700 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 52 [2021-06-12 22:06:47,927 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2021-06-12 22:06:48,149 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 22:06:48,485 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-12 22:06:48,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:06:48,682 INFO L93 Difference]: Finished difference Result 2355 states and 7541 transitions. [2021-06-12 22:06:48,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:06:48,683 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-06-12 22:06:48,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:06:48,686 INFO L225 Difference]: With dead ends: 2355 [2021-06-12 22:06:48,686 INFO L226 Difference]: Without dead ends: 2325 [2021-06-12 22:06:48,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2898.1ms TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:06:48,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2021-06-12 22:06:48,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 1465. [2021-06-12 22:06:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.3490437158469946) internal successors, (4903), 1464 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) [2021-06-12 22:06:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4903 transitions. [2021-06-12 22:06:48,711 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4903 transitions. Word has length 26 [2021-06-12 22:06:48,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:06:48,712 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 4903 transitions. [2021-06-12 22:06:48,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:48,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4903 transitions. [2021-06-12 22:06:48,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:06:48,714 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:06:48,714 INFO L472 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] [2021-06-12 22:06:48,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1106,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:48,915 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:06:48,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:06:48,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 17 times [2021-06-12 22:06:48,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:06:48,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815235807] [2021-06-12 22:06:48,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:06:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:49,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:06:49,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815235807] [2021-06-12 22:06:49,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815235807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:49,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411728397] [2021-06-12 22:06:49,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:49,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:06:49,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:06:49,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:06:49,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:06:49,529 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-12 22:06:49,772 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_46], 2=[A, v_prenex_45]} [2021-06-12 22:06:49,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:49,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:06:49,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:49,891 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-12 22:06:49,892 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-06-12 22:06:49,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:49,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:49,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:49,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:49,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:49,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:49,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:49,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:49,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:49,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:49,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:49,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:49,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:06:49,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:49,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:49,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:06:49,989 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-06-12 22:06:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:50,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411728397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:50,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:06:50,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:06:50,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355548494] [2021-06-12 22:06:50,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:06:50,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:06:50,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:06:50,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:06:50,042 INFO L87 Difference]: Start difference. First operand 1465 states and 4903 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:51,366 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-12 22:06:51,714 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-06-12 22:06:51,923 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-06-12 22:06:52,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:06:52,107 INFO L93 Difference]: Finished difference Result 2028 states and 6589 transitions. [2021-06-12 22:06:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:06:52,107 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-06-12 22:06:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:06:52,110 INFO L225 Difference]: With dead ends: 2028 [2021-06-12 22:06:52,110 INFO L226 Difference]: Without dead ends: 1998 [2021-06-12 22:06:52,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 2261.6ms TimeCoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 22:06:52,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-06-12 22:06:52,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1468. [2021-06-12 22:06:52,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.3503749147920927) internal successors, (4915), 1467 states have internal predecessors, (4915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:52,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4915 transitions. [2021-06-12 22:06:52,128 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4915 transitions. Word has length 26 [2021-06-12 22:06:52,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:06:52,128 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 4915 transitions. [2021-06-12 22:06:52,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:52,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4915 transitions. [2021-06-12 22:06:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:06:52,130 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:06:52,130 INFO L472 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] [2021-06-12 22:06:52,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:52,346 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:06:52,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:06:52,346 INFO L82 PathProgramCache]: Analyzing trace with hash -808425550, now seen corresponding path program 18 times [2021-06-12 22:06:52,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:06:52,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943526008] [2021-06-12 22:06:52,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:06:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:52,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:06:52,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943526008] [2021-06-12 22:06:52,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943526008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:52,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116600891] [2021-06-12 22:06:52,683 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:52,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:06:52,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:06:52,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:06:52,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:06:53,004 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-12 22:06:53,143 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_54, v_prenex_64, v_prenex_58], 6=[A, v_prenex_60, v_prenex_62, v_prenex_56, v_prenex_66]} [2021-06-12 22:06:53,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:53,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:53,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:06:53,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:53,470 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 130 [2021-06-12 22:06:53,470 INFO L628 ElimStorePlain]: treesize reduction 272, result has 55.1 percent of original size [2021-06-12 22:06:53,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:53,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:53,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:06:53,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:53,601 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-12 22:06:53,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:53,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:53,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:53,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:06:53,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:53,731 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-12 22:06:53,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:53,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:53,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:53,743 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:06:53,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 22:06:53,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:53,850 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-12 22:06:53,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:53,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:53,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:53,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:53,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-12 22:06:53,865 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:53,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:53,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:53,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:53,976 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:06:53,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-06-12 22:06:53,978 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:54,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:54,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:54,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:54,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:54,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:06:54,088 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:54,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:54,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:54,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:54,188 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:06:54,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-06-12 22:06:54,190 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:54,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:06:54,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:06:54,296 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:621, output treesize:217 [2021-06-12 22:06:54,453 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-06-12 22:06:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:54,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116600891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:54,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:06:54,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:06:54,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312838613] [2021-06-12 22:06:54,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:06:54,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:06:54,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:06:54,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:06:54,540 INFO L87 Difference]: Start difference. First operand 1468 states and 4915 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:06:55,155 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-06-12 22:06:55,717 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-12 22:06:56,184 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-12 22:06:56,531 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-12 22:06:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:06:56,771 INFO L93 Difference]: Finished difference Result 1972 states and 6440 transitions. [2021-06-12 22:06:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:06:56,771 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:06:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:06:56,774 INFO L225 Difference]: With dead ends: 1972 [2021-06-12 22:06:56,774 INFO L226 Difference]: Without dead ends: 1957 [2021-06-12 22:06:56,774 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2547.6ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:06:56,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-06-12 22:06:56,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1465. [2021-06-12 22:06:56,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.3490437158469946) internal successors, (4903), 1464 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) [2021-06-12 22:06:56,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4903 transitions. [2021-06-12 22:06:56,793 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4903 transitions. Word has length 26 [2021-06-12 22:06:56,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:06:56,793 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 4903 transitions. [2021-06-12 22:06:56,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:06:56,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4903 transitions. [2021-06-12 22:06:56,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:06:56,795 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:06:56,795 INFO L472 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] [2021-06-12 22:06:57,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1141,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:57,012 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:06:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:06:57,012 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 19 times [2021-06-12 22:06:57,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:06:57,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723660878] [2021-06-12 22:06:57,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:06:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:57,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:06:57,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723660878] [2021-06-12 22:06:57,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723660878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:57,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167039519] [2021-06-12 22:06:57,441 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:57,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:06:57,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:06:57,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:57,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:57,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:57,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:57,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:06:57,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:57,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:57,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:57,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:57,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:57,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:06:57,835 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:57,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:57,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:06:57,841 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:57,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:57,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:06:57,847 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:57,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:57,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:57,853 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:57,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:57,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:06:57,859 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:57,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:57,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:57,865 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:57,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:57,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:57,870 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:57,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:57,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-12 22:06:57,876 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:57,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:57,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:06:57,882 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:57,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:57,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:57,888 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:57,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:57,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:06:57,893 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:57,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:06:57,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:06:57,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:06:57,897 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:06:57,967 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-12 22:06:57,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:06:57,969 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-12 22:06:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:58,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167039519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:58,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:06:58,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:06:58,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320899466] [2021-06-12 22:06:58,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:06:58,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:06:58,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:06:58,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:06:58,016 INFO L87 Difference]: Start difference. First operand 1465 states and 4903 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:06:58,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:06:58,829 INFO L93 Difference]: Finished difference Result 1916 states and 6261 transitions. [2021-06-12 22:06:58,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:06:58,830 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:06:58,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:06:58,832 INFO L225 Difference]: With dead ends: 1916 [2021-06-12 22:06:58,832 INFO L226 Difference]: Without dead ends: 1895 [2021-06-12 22:06:58,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1098.2ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:06:58,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-06-12 22:06:58,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1506. [2021-06-12 22:06:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.345514950166113) internal successors, (5035), 1505 states have internal predecessors, (5035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5035 transitions. [2021-06-12 22:06:58,849 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5035 transitions. Word has length 26 [2021-06-12 22:06:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:06:58,849 INFO L482 AbstractCegarLoop]: Abstraction has 1506 states and 5035 transitions. [2021-06-12 22:06:58,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:06:58,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5035 transitions. [2021-06-12 22:06:58,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:06:58,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:06:58,851 INFO L472 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] [2021-06-12 22:06:59,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1166 [2021-06-12 22:06:59,052 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:06:59,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:06:59,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 20 times [2021-06-12 22:06:59,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:06:59,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60291296] [2021-06-12 22:06:59,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:06:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:59,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:06:59,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60291296] [2021-06-12 22:06:59,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60291296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:59,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363453127] [2021-06-12 22:06:59,498 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:06:59,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:06:59,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:59,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:06:59,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:07:00,110 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-06-12 22:07:00,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2021-06-12 22:07:00,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:00,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:00,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-06-12 22:07:00,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:00,579 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-06-12 22:07:00,579 INFO L628 ElimStorePlain]: treesize reduction 17, result has 95.3 percent of original size [2021-06-12 22:07:00,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:00,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 34 [2021-06-12 22:07:00,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:00,628 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:07:00,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 22:07:00,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:00,764 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-12 22:07:00,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:00,789 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:07:00,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-12 22:07:00,791 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:00,813 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:07:00,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 22:07:00,816 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:00,945 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-12 22:07:00,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:00,967 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:07:00,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 22:07:00,969 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:00,996 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-06-12 22:07:00,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 39 [2021-06-12 22:07:00,997 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:01,126 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-12 22:07:01,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:01,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:07:01,171 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:746 [2021-06-12 22:07:01,584 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-06-12 22:07:01,855 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-12 22:07:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:01,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363453127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:01,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:07:01,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-12 22:07:01,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994677776] [2021-06-12 22:07:01,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:07:01,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:07:01,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:07:01,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:07:01,977 INFO L87 Difference]: Start difference. First operand 1506 states and 5035 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:02,140 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 21 [2021-06-12 22:07:02,285 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 27 [2021-06-12 22:07:02,629 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 47 [2021-06-12 22:07:02,928 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 51 [2021-06-12 22:07:03,272 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 50 [2021-06-12 22:07:03,587 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 41 [2021-06-12 22:07:03,806 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-12 22:07:04,360 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 83 [2021-06-12 22:07:04,490 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-06-12 22:07:04,895 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 53 [2021-06-12 22:07:05,172 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-12 22:07:05,631 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2021-06-12 22:07:06,081 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-12 22:07:06,552 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 103 [2021-06-12 22:07:06,923 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-06-12 22:07:06,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:07:06,987 INFO L93 Difference]: Finished difference Result 2133 states and 6814 transitions. [2021-06-12 22:07:06,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:07:06,987 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-06-12 22:07:06,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:07:06,990 INFO L225 Difference]: With dead ends: 2133 [2021-06-12 22:07:06,990 INFO L226 Difference]: Without dead ends: 2108 [2021-06-12 22:07:06,990 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 5789.7ms TimeCoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:07:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-06-12 22:07:07,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1529. [2021-06-12 22:07:07,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.352094240837696) internal successors, (5122), 1528 states have internal predecessors, (5122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5122 transitions. [2021-06-12 22:07:07,009 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5122 transitions. Word has length 26 [2021-06-12 22:07:07,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:07:07,009 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5122 transitions. [2021-06-12 22:07:07,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:07,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5122 transitions. [2021-06-12 22:07:07,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:07:07,011 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:07:07,011 INFO L472 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] [2021-06-12 22:07:07,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1198 [2021-06-12 22:07:07,213 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:07:07,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:07:07,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2016041692, now seen corresponding path program 21 times [2021-06-12 22:07:07,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:07:07,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181679529] [2021-06-12 22:07:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:07:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:07:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:07,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:07:07,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181679529] [2021-06-12 22:07:07,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181679529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:07,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893266815] [2021-06-12 22:07:07,734 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:07,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:07:07,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:07:07,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:07:07,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:07:08,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:08,049 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:08,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:07:08,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:08,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:08,057 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:08,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:07:08,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:08,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:08,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:08,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:07:08,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:08,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:08,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:08,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:07:08,084 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:08,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:08,091 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:08,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:07:08,092 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:08,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:08,099 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:08,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:07:08,100 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:08,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:08,110 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:07:08,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:07:08,112 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:08,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:08,119 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:08,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:07:08,120 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:08,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:08,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:08,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:07:08,133 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:08,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:08,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:08,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:07:08,146 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:08,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:08,154 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:08,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:07:08,155 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:08,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:08,165 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:07:08,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:07:08,166 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:08,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:08,183 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:07:08,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:07:08,185 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:08,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:08,193 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:08,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:07:08,193 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:08,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:08,201 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:08,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:07:08,201 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:08,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:08,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:08,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:07:08,216 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:08,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:08,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:07:08,297 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-06-12 22:07:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:08,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893266815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:08,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:07:08,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 22:07:08,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687677289] [2021-06-12 22:07:08,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:07:08,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:07:08,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:07:08,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:07:08,487 INFO L87 Difference]: Start difference. First operand 1529 states and 5122 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:09,832 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-12 22:07:10,238 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-06-12 22:07:10,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:07:10,289 INFO L93 Difference]: Finished difference Result 2011 states and 6582 transitions. [2021-06-12 22:07:10,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:07:10,290 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-06-12 22:07:10,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:07:10,292 INFO L225 Difference]: With dead ends: 2011 [2021-06-12 22:07:10,292 INFO L226 Difference]: Without dead ends: 1982 [2021-06-12 22:07:10,293 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2085.3ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:07:10,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2021-06-12 22:07:10,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1532. [2021-06-12 22:07:10,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.3527106466361856) internal successors, (5133), 1531 states have internal predecessors, (5133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:10,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5133 transitions. [2021-06-12 22:07:10,311 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5133 transitions. Word has length 26 [2021-06-12 22:07:10,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:07:10,312 INFO L482 AbstractCegarLoop]: Abstraction has 1532 states and 5133 transitions. [2021-06-12 22:07:10,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:10,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5133 transitions. [2021-06-12 22:07:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:07:10,314 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:07:10,314 INFO L472 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] [2021-06-12 22:07:10,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1278 [2021-06-12 22:07:10,517 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:07:10,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:07:10,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 22 times [2021-06-12 22:07:10,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:07:10,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363326903] [2021-06-12 22:07:10,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:07:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:07:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:10,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:07:10,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363326903] [2021-06-12 22:07:10,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363326903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:10,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839977392] [2021-06-12 22:07:10,884 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:10,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:07:10,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:07:10,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:07:10,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:07:11,189 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-12 22:07:11,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:11,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:11,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:11,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:07:11,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:11,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:11,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:11,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:07:11,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:11,356 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-06-12 22:07:11,356 INFO L628 ElimStorePlain]: treesize reduction 91, result has 58.6 percent of original size [2021-06-12 22:07:11,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:11,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:07:11,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:11,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:11,400 INFO L518 ElimStorePlain]: Eliminatee v_prenex_87 vanished before elimination [2021-06-12 22:07:11,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:11,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:11,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:11,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:07:11,406 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:11,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:11,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:11,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:07:11,410 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:11,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:11,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:07:11,445 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:272, output treesize:51 [2021-06-12 22:07:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:11,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839977392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:11,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:07:11,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:07:11,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174613288] [2021-06-12 22:07:11,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:07:11,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:07:11,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:07:11,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:07:11,499 INFO L87 Difference]: Start difference. First operand 1532 states and 5133 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:07:11,807 INFO L93 Difference]: Finished difference Result 1607 states and 5324 transitions. [2021-06-12 22:07:11,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:07:11,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:07:11,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:07:11,810 INFO L225 Difference]: With dead ends: 1607 [2021-06-12 22:07:11,810 INFO L226 Difference]: Without dead ends: 1592 [2021-06-12 22:07:11,810 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 675.6ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:07:11,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-06-12 22:07:11,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1538. [2021-06-12 22:07:11,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.3545868575146387) internal successors, (5156), 1537 states have internal predecessors, (5156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:11,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5156 transitions. [2021-06-12 22:07:11,827 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5156 transitions. Word has length 26 [2021-06-12 22:07:11,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:07:11,827 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 5156 transitions. [2021-06-12 22:07:11,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:11,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5156 transitions. [2021-06-12 22:07:11,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:07:11,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:07:11,829 INFO L472 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] [2021-06-12 22:07:12,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1319,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:12,043 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:07:12,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:07:12,043 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 23 times [2021-06-12 22:07:12,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:07:12,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192986151] [2021-06-12 22:07:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:07:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:07:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:12,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:07:12,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192986151] [2021-06-12 22:07:12,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192986151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:12,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030915064] [2021-06-12 22:07:12,372 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:12,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:07:12,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:07:12,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:07:12,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:07:12,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:12,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:12,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:07:12,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:12,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:12,848 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:07:12,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:07:12,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:12,989 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-12 22:07:12,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:12,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:13,011 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:07:13,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:07:13,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:13,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:13,031 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:07:13,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:07:13,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:13,167 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-12 22:07:13,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:13,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:13,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:13,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:07:13,187 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:13,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:13,206 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:07:13,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-12 22:07:13,207 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:13,469 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-06-12 22:07:13,470 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-06-12 22:07:13,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:13,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:13,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:07:13,490 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:13,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:13,507 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:07:13,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:07:13,508 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:13,738 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-12 22:07:13,738 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-06-12 22:07:13,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:07:13,755 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-06-12 22:07:13,929 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-06-12 22:07:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:14,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030915064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:14,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:07:14,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:07:14,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928647873] [2021-06-12 22:07:14,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:07:14,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:07:14,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:07:14,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:07:14,023 INFO L87 Difference]: Start difference. First operand 1538 states and 5156 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:14,861 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-12 22:07:15,541 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-06-12 22:07:15,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:07:15,590 INFO L93 Difference]: Finished difference Result 2227 states and 7222 transitions. [2021-06-12 22:07:15,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:07:15,590 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-06-12 22:07:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:07:15,593 INFO L225 Difference]: With dead ends: 2227 [2021-06-12 22:07:15,593 INFO L226 Difference]: Without dead ends: 2177 [2021-06-12 22:07:15,593 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1830.0ms TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:07:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2021-06-12 22:07:15,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 1545. [2021-06-12 22:07:15,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3588082901554404) internal successors, (5186), 1544 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:15,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5186 transitions. [2021-06-12 22:07:15,612 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5186 transitions. Word has length 26 [2021-06-12 22:07:15,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:07:15,612 INFO L482 AbstractCegarLoop]: Abstraction has 1545 states and 5186 transitions. [2021-06-12 22:07:15,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:15,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5186 transitions. [2021-06-12 22:07:15,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:07:15,614 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:07:15,614 INFO L472 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] [2021-06-12 22:07:15,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1330 [2021-06-12 22:07:15,814 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:07:15,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:07:15,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 24 times [2021-06-12 22:07:15,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:07:15,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478286164] [2021-06-12 22:07:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:07:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:07:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:16,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:07:16,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478286164] [2021-06-12 22:07:16,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478286164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:16,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463536322] [2021-06-12 22:07:16,239 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:16,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:07:16,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:07:16,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:07:16,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:07:16,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:16,469 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:16,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:07:16,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:16,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:16,478 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:16,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:07:16,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:16,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:16,486 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:16,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:07:16,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:16,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:16,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:16,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:07:16,500 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:16,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:16,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:16,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:07:16,513 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:16,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:16,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:16,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:07:16,524 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:16,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:16,532 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:16,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:07:16,532 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:16,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:16,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:16,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:07:16,544 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:16,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:16,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:16,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:07:16,557 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:16,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:16,566 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:16,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:07:16,566 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:16,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:16,575 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:16,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:07:16,575 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:16,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:16,583 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:16,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:07:16,584 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:16,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:16,594 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:07:16,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:07:16,605 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:16,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:16,614 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:07:16,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:07:16,616 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:16,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:16,626 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:07:16,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:07:16,627 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:16,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:16,632 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:16,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:07:16,632 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:16,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:16,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:07:16,700 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-12 22:07:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:16,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463536322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:16,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:07:16,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:07:16,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257946771] [2021-06-12 22:07:16,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:07:16,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:07:16,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:07:16,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:07:16,872 INFO L87 Difference]: Start difference. First operand 1545 states and 5186 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:17,488 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-06-12 22:07:18,049 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-06-12 22:07:18,314 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-12 22:07:18,565 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-12 22:07:18,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:07:18,633 INFO L93 Difference]: Finished difference Result 2071 states and 6812 transitions. [2021-06-12 22:07:18,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:07:18,634 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-06-12 22:07:18,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:07:18,636 INFO L225 Difference]: With dead ends: 2071 [2021-06-12 22:07:18,636 INFO L226 Difference]: Without dead ends: 2052 [2021-06-12 22:07:18,637 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2061.7ms TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:07:18,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-06-12 22:07:18,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1557. [2021-06-12 22:07:18,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.3618251928020566) internal successors, (5231), 1556 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5231 transitions. [2021-06-12 22:07:18,656 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5231 transitions. Word has length 26 [2021-06-12 22:07:18,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:07:18,656 INFO L482 AbstractCegarLoop]: Abstraction has 1557 states and 5231 transitions. [2021-06-12 22:07:18,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:18,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5231 transitions. [2021-06-12 22:07:18,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:07:18,658 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:07:18,658 INFO L472 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] [2021-06-12 22:07:18,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-06-12 22:07:18,859 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:07:18,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:07:18,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 25 times [2021-06-12 22:07:18,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:07:18,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289013017] [2021-06-12 22:07:18,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:07:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:07:19,208 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-12 22:07:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:19,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:07:19,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289013017] [2021-06-12 22:07:19,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289013017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:19,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810811671] [2021-06-12 22:07:19,309 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:07:19,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:07:19,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:07:19,665 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-12 22:07:19,754 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_98], 3=[A, v_prenex_100], 6=[v_prenex_99]} [2021-06-12 22:07:19,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:19,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:19,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:07:19,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:19,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:19,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:19,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:07:19,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:19,924 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 22:07:19,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:19,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:19,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:19,939 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:07:19,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-06-12 22:07:19,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:19,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:19,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:19,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:19,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:07:19,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:20,087 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-12 22:07:20,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:20,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:20,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:20,100 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:07:20,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 22:07:20,101 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:20,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:20,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:20,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:20,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-12 22:07:20,114 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:20,225 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-12 22:07:20,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:20,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:20,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:20,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:20,239 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:07:20,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-06-12 22:07:20,240 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:20,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:20,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:20,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:20,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:07:20,253 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:20,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:20,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:07:20,372 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:375, output treesize:228 [2021-06-12 22:07:20,542 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-06-12 22:07:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:20,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810811671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:20,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:07:20,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:07:20,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298130161] [2021-06-12 22:07:20,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:07:20,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:07:20,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:07:20,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:07:20,641 INFO L87 Difference]: Start difference. First operand 1557 states and 5231 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:07:21,184 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2021-06-12 22:07:21,451 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-12 22:07:22,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:07:22,005 INFO L93 Difference]: Finished difference Result 2052 states and 6751 transitions. [2021-06-12 22:07:22,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:07:22,005 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:07:22,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:07:22,008 INFO L225 Difference]: With dead ends: 2052 [2021-06-12 22:07:22,009 INFO L226 Difference]: Without dead ends: 2027 [2021-06-12 22:07:22,009 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1783.3ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:07:22,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-06-12 22:07:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1563. [2021-06-12 22:07:22,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1562 states have (on average 3.360435339308579) internal successors, (5249), 1562 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:22,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 5249 transitions. [2021-06-12 22:07:22,027 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 5249 transitions. Word has length 26 [2021-06-12 22:07:22,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:07:22,027 INFO L482 AbstractCegarLoop]: Abstraction has 1563 states and 5249 transitions. [2021-06-12 22:07:22,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:07:22,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 5249 transitions. [2021-06-12 22:07:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:07:22,029 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:07:22,029 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:07:22,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1403 [2021-06-12 22:07:22,233 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:07:22,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:07:22,234 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-06-12 22:07:22,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:07:22,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61211699] [2021-06-12 22:07:22,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:07:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:07:22,533 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-06-12 22:07:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:22,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:07:22,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61211699] [2021-06-12 22:07:22,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61211699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:22,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549085005] [2021-06-12 22:07:22,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:22,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:07:22,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:07:22,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 22:07:22,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:07:23,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,164 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 32 treesize of output 13 [2021-06-12 22:07:23,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:23,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,172 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 41 treesize of output 19 [2021-06-12 22:07:23,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:23,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,180 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 32 treesize of output 16 [2021-06-12 22:07:23,180 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:23,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,187 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 43 treesize of output 13 [2021-06-12 22:07:23,188 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:23,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,195 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 32 treesize of output 16 [2021-06-12 22:07:23,195 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:23,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,206 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 43 treesize of output 13 [2021-06-12 22:07:23,207 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:23,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,214 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 36 treesize of output 16 [2021-06-12 22:07:23,215 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:23,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,223 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 43 treesize of output 16 [2021-06-12 22:07:23,223 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:23,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,230 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 39 treesize of output 19 [2021-06-12 22:07:23,231 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:23,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,237 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 30 treesize of output 13 [2021-06-12 22:07:23,238 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:23,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,245 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 36 treesize of output 16 [2021-06-12 22:07:23,245 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:23,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,253 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 43 treesize of output 16 [2021-06-12 22:07:23,253 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:23,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,261 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 41 treesize of output 19 [2021-06-12 22:07:23,261 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:23,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-06-12 22:07:23,269 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:23,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,275 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 25 treesize of output 7 [2021-06-12 22:07:23,276 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:23,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:23,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:23,280 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 39 treesize of output 19 [2021-06-12 22:07:23,281 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:23,314 INFO L628 ElimStorePlain]: treesize reduction 21, result has 65.0 percent of original size [2021-06-12 22:07:23,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:07:23,315 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:809, output treesize:39 [2021-06-12 22:07:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:23,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549085005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:23,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:07:23,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:07:23,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483155216] [2021-06-12 22:07:23,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:07:23,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:07:23,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:07:23,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:07:23,372 INFO L87 Difference]: Start difference. First operand 1563 states and 5249 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:24,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:07:24,273 INFO L93 Difference]: Finished difference Result 2040 states and 6673 transitions. [2021-06-12 22:07:24,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:07:24,274 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:07:24,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:07:24,276 INFO L225 Difference]: With dead ends: 2040 [2021-06-12 22:07:24,277 INFO L226 Difference]: Without dead ends: 2014 [2021-06-12 22:07:24,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1387.1ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:07:24,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-06-12 22:07:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1579. [2021-06-12 22:07:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.3542458808618503) internal successors, (5293), 1578 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:24,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5293 transitions. [2021-06-12 22:07:24,295 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5293 transitions. Word has length 26 [2021-06-12 22:07:24,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:07:24,295 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5293 transitions. [2021-06-12 22:07:24,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5293 transitions. [2021-06-12 22:07:24,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:07:24,297 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:07:24,297 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:07:24,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1436,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:24,497 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:07:24,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:07:24,497 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-06-12 22:07:24,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:07:24,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842179218] [2021-06-12 22:07:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:07:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:07:24,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:24,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:07:24,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842179218] [2021-06-12 22:07:24,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842179218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:24,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781080848] [2021-06-12 22:07:24,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:07:24,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:07:24,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:07:25,223 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_103], 5=[v_prenex_101, v_prenex_105]} [2021-06-12 22:07:25,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:25,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:25,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:25,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:25,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:07:25,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:25,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:25,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:25,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:25,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:07:25,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:25,314 INFO L628 ElimStorePlain]: treesize reduction 141, result has 40.8 percent of original size [2021-06-12 22:07:25,314 INFO L518 ElimStorePlain]: Eliminatee v_prenex_103 vanished before elimination [2021-06-12 22:07:25,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:25,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:25,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:25,318 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 25 treesize of output 13 [2021-06-12 22:07:25,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:25,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:25,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:25,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-12 22:07:25,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:25,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:25,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:07:25,375 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:294, output treesize:33 [2021-06-12 22:07:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:25,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781080848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:25,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:07:25,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:07:25,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391014750] [2021-06-12 22:07:25,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:07:25,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:07:25,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:07:25,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:07:25,418 INFO L87 Difference]: Start difference. First operand 1579 states and 5293 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 22:07:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:07:27,919 INFO L93 Difference]: Finished difference Result 2239 states and 7310 transitions. [2021-06-12 22:07:27,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:07:27,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:07:27,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:07:27,923 INFO L225 Difference]: With dead ends: 2239 [2021-06-12 22:07:27,923 INFO L226 Difference]: Without dead ends: 2224 [2021-06-12 22:07:27,929 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 2667.4ms TimeCoverageRelationStatistics Valid=512, Invalid=2244, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 22:07:27,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-06-12 22:07:27,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 1579. [2021-06-12 22:07:27,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.3542458808618503) internal successors, (5293), 1578 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:27,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5293 transitions. [2021-06-12 22:07:27,951 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5293 transitions. Word has length 26 [2021-06-12 22:07:27,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:07:27,951 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5293 transitions. [2021-06-12 22:07:27,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 22:07:27,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5293 transitions. [2021-06-12 22:07:27,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:07:27,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:07:27,953 INFO L472 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] [2021-06-12 22:07:28,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1455 [2021-06-12 22:07:28,169 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:07:28,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:07:28,170 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 26 times [2021-06-12 22:07:28,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:07:28,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713257426] [2021-06-12 22:07:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:07:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:07:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:28,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:07:28,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713257426] [2021-06-12 22:07:28,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713257426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:28,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501878319] [2021-06-12 22:07:28,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:28,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:07:28,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:07:28,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:07:28,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:07:28,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:28,914 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:28,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:07:28,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:28,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:28,923 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:28,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:07:28,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:28,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:28,931 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:28,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:07:28,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:28,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:28,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:28,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:07:28,943 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:28,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:28,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:28,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:07:28,956 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:28,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:28,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:28,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:07:28,969 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:28,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:28,977 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:28,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:07:28,977 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:28,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:28,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:28,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:07:28,988 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:28,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:28,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:28,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:07:29,002 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:29,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:29,010 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:29,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:07:29,010 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:29,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:29,018 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:29,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:07:29,019 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:29,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:29,026 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:29,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:07:29,027 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:29,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:29,037 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:07:29,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:07:29,039 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:29,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:29,048 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:07:29,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:07:29,049 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:29,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:29,061 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:07:29,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:07:29,062 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:29,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:29,067 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:07:29,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:07:29,068 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:29,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:29,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:07:29,134 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-12 22:07:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:29,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501878319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:29,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:07:29,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:07:29,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385232568] [2021-06-12 22:07:29,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:07:29,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:07:29,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:07:29,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:07:29,303 INFO L87 Difference]: Start difference. First operand 1579 states and 5293 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:30,831 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-06-12 22:07:31,016 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-06-12 22:07:31,318 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-12 22:07:31,527 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-12 22:07:31,779 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-06-12 22:07:31,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:07:31,828 INFO L93 Difference]: Finished difference Result 2206 states and 7151 transitions. [2021-06-12 22:07:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:07:31,828 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-06-12 22:07:31,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:07:31,832 INFO L225 Difference]: With dead ends: 2206 [2021-06-12 22:07:31,832 INFO L226 Difference]: Without dead ends: 2187 [2021-06-12 22:07:31,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2687.3ms TimeCoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:07:31,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-06-12 22:07:31,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1585. [2021-06-12 22:07:31,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.352272727272727) internal successors, (5310), 1584 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:31,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5310 transitions. [2021-06-12 22:07:31,852 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5310 transitions. Word has length 26 [2021-06-12 22:07:31,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:07:31,852 INFO L482 AbstractCegarLoop]: Abstraction has 1585 states and 5310 transitions. [2021-06-12 22:07:31,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:31,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5310 transitions. [2021-06-12 22:07:31,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:07:31,854 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:07:31,854 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:07:32,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1469,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:32,054 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:07:32,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:07:32,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-06-12 22:07:32,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:07:32,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544026174] [2021-06-12 22:07:32,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:07:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:07:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:32,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:07:32,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544026174] [2021-06-12 22:07:32,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544026174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:32,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627714828] [2021-06-12 22:07:32,510 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) [2021-06-12 22:07:32,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:07:32,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:32,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:07:32,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:07:32,875 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-12 22:07:33,192 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_118, A], 5=[v_prenex_120, v_prenex_116]} [2021-06-12 22:07:33,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:33,214 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:07:33,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:07:33,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:33,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:33,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:33,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:07:33,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:33,387 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 22:07:33,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:33,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:33,410 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:07:33,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:07:33,411 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:33,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:33,429 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:07:33,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:07:33,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:33,576 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 22:07:33,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:33,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:33,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:33,596 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:07:33,597 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-06-12 22:07:33,598 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:33,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:33,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:33,611 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-06-12 22:07:33,616 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:33,746 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-12 22:07:33,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:33,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:33,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:33,769 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:07:33,769 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-06-12 22:07:33,770 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:33,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:33,786 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:07:33,787 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-06-12 22:07:33,789 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:33,904 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-12 22:07:33,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:33,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:07:33,916 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:393, output treesize:161 [2021-06-12 22:07:34,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:34,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627714828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:34,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:07:34,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:07:34,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044228364] [2021-06-12 22:07:34,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:07:34,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:07:34,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:07:34,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:07:34,057 INFO L87 Difference]: Start difference. First operand 1585 states and 5310 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:34,676 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2021-06-12 22:07:36,337 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 46 [2021-06-12 22:07:36,781 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-06-12 22:07:36,938 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-06-12 22:07:37,505 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2021-06-12 22:07:37,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:07:37,864 INFO L93 Difference]: Finished difference Result 2573 states and 8159 transitions. [2021-06-12 22:07:37,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:07:37,864 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 26 [2021-06-12 22:07:37,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:07:37,867 INFO L225 Difference]: With dead ends: 2573 [2021-06-12 22:07:37,867 INFO L226 Difference]: Without dead ends: 2529 [2021-06-12 22:07:37,868 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 4076.6ms TimeCoverageRelationStatistics Valid=671, Invalid=3361, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:07:37,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2021-06-12 22:07:37,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1585. [2021-06-12 22:07:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.352272727272727) internal successors, (5310), 1584 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:37,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5310 transitions. [2021-06-12 22:07:37,888 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5310 transitions. Word has length 26 [2021-06-12 22:07:37,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:07:37,888 INFO L482 AbstractCegarLoop]: Abstraction has 1585 states and 5310 transitions. [2021-06-12 22:07:37,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:37,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5310 transitions. [2021-06-12 22:07:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:07:37,890 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:07:37,890 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:07:38,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1486 [2021-06-12 22:07:38,090 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:07:38,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:07:38,091 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-06-12 22:07:38,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:07:38,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22803014] [2021-06-12 22:07:38,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:07:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:07:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:38,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:07:38,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22803014] [2021-06-12 22:07:38,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22803014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:38,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251491626] [2021-06-12 22:07:38,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:38,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:07:38,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:07:38,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:07:38,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:07:38,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:38,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:38,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,017 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 22:07:39,018 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 43 treesize of output 33 [2021-06-12 22:07:39,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:39,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:39,046 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 25 treesize of output 41 [2021-06-12 22:07:39,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:39,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,078 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-12 22:07:39,078 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 30 treesize of output 26 [2021-06-12 22:07:39,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:39,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,107 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-12 22:07:39,108 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 37 treesize of output 25 [2021-06-12 22:07:39,109 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:39,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,126 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:07:39,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 22:07:39,127 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:39,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,144 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:07:39,144 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 41 treesize of output 1 [2021-06-12 22:07:39,144 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:39,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,161 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:07:39,161 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 34 treesize of output 1 [2021-06-12 22:07:39,161 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:39,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,177 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:07:39,178 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 43 treesize of output 1 [2021-06-12 22:07:39,178 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:39,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,204 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-12 22:07:39,204 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 32 treesize of output 26 [2021-06-12 22:07:39,205 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:39,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,229 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-12 22:07:39,229 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 32 treesize of output 25 [2021-06-12 22:07:39,230 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:39,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,246 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:07:39,246 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 45 treesize of output 1 [2021-06-12 22:07:39,247 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:39,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,262 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:07:39,262 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 41 treesize of output 1 [2021-06-12 22:07:39,263 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:39,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,279 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:07:39,279 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 34 treesize of output 1 [2021-06-12 22:07:39,279 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:39,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,294 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:07:39,294 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 37 treesize of output 1 [2021-06-12 22:07:39,295 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:39,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,309 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:07:39,309 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 43 treesize of output 1 [2021-06-12 22:07:39,310 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:39,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:39,325 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-12 22:07:39,325 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 36 treesize of output 25 [2021-06-12 22:07:39,327 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:39,442 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-06-12 22:07:39,442 INFO L628 ElimStorePlain]: treesize reduction 79, result has 66.8 percent of original size [2021-06-12 22:07:39,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:07:39,445 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:180 [2021-06-12 22:07:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:39,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251491626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:39,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:07:39,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 22:07:39,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915381244] [2021-06-12 22:07:39,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:07:39,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:07:39,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:07:39,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:07:39,583 INFO L87 Difference]: Start difference. First operand 1585 states and 5310 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:41,137 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-06-12 22:07:42,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:07:42,536 INFO L93 Difference]: Finished difference Result 3102 states and 9804 transitions. [2021-06-12 22:07:42,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:07:42,537 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:07:42,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:07:42,541 INFO L225 Difference]: With dead ends: 3102 [2021-06-12 22:07:42,541 INFO L226 Difference]: Without dead ends: 3072 [2021-06-12 22:07:42,541 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 2839.6ms TimeCoverageRelationStatistics Valid=533, Invalid=3007, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:07:42,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2021-06-12 22:07:42,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 1645. [2021-06-12 22:07:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.3619221411192215) internal successors, (5527), 1644 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:42,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5527 transitions. [2021-06-12 22:07:42,576 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5527 transitions. Word has length 26 [2021-06-12 22:07:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:07:42,576 INFO L482 AbstractCegarLoop]: Abstraction has 1645 states and 5527 transitions. [2021-06-12 22:07:42,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5527 transitions. [2021-06-12 22:07:42,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:07:42,578 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:07:42,578 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:07:42,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1554 [2021-06-12 22:07:42,785 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:07:42,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:07:42,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-06-12 22:07:42,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:07:42,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499520875] [2021-06-12 22:07:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:07:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:07:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:43,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:07:43,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499520875] [2021-06-12 22:07:43,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499520875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:43,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606085738] [2021-06-12 22:07:43,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:43,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:07:43,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:07:43,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:07:43,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:07:43,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,735 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 33 treesize of output 13 [2021-06-12 22:07:43,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:43,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:07:43,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:43,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,750 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 39 treesize of output 13 [2021-06-12 22:07:43,751 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:43,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,766 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 34 treesize of output 16 [2021-06-12 22:07:43,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:43,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,774 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 28 treesize of output 13 [2021-06-12 22:07:43,774 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:43,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,781 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 30 treesize of output 16 [2021-06-12 22:07:43,782 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:43,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,789 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 39 treesize of output 19 [2021-06-12 22:07:43,790 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:43,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,796 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 32 treesize of output 16 [2021-06-12 22:07:43,797 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:43,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,804 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 35 treesize of output 19 [2021-06-12 22:07:43,804 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:43,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,814 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 41 treesize of output 16 [2021-06-12 22:07:43,814 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:43,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,821 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 28 treesize of output 13 [2021-06-12 22:07:43,822 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:43,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,829 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 41 treesize of output 13 [2021-06-12 22:07:43,830 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:43,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,837 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 35 treesize of output 19 [2021-06-12 22:07:43,837 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:43,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,844 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 30 treesize of output 16 [2021-06-12 22:07:43,844 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:43,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:43,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:07:43,857 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 39 treesize of output 16 [2021-06-12 22:07:43,857 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:43,886 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-06-12 22:07:43,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:07:43,888 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-12 22:07:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:43,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606085738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:43,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:07:43,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-12 22:07:43,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319011633] [2021-06-12 22:07:43,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:07:43,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:07:43,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:07:43,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:07:43,911 INFO L87 Difference]: Start difference. First operand 1645 states and 5527 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:45,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:07:45,984 INFO L93 Difference]: Finished difference Result 3253 states and 10418 transitions. [2021-06-12 22:07:45,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:07:45,985 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:07:45,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:07:45,989 INFO L225 Difference]: With dead ends: 3253 [2021-06-12 22:07:45,989 INFO L226 Difference]: Without dead ends: 3217 [2021-06-12 22:07:45,989 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2002.2ms TimeCoverageRelationStatistics Valid=449, Invalid=2001, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:07:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3217 states. [2021-06-12 22:07:46,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3217 to 1763. [2021-06-12 22:07:46,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 3.388195232690125) internal successors, (5970), 1762 states have internal predecessors, (5970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 5970 transitions. [2021-06-12 22:07:46,014 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 5970 transitions. Word has length 26 [2021-06-12 22:07:46,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:07:46,014 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 5970 transitions. [2021-06-12 22:07:46,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:46,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 5970 transitions. [2021-06-12 22:07:46,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:07:46,016 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:07:46,017 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:07:46,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1660 [2021-06-12 22:07:46,217 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:07:46,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:07:46,217 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-06-12 22:07:46,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:07:46,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099695102] [2021-06-12 22:07:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:07:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:07:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:46,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:07:46,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099695102] [2021-06-12 22:07:46,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099695102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:46,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728400309] [2021-06-12 22:07:46,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:46,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:07:46,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:07:46,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:07:46,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:07:47,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,038 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:07:47,038 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 35 treesize of output 31 [2021-06-12 22:07:47,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:47,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,062 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-12 22:07:47,062 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 41 treesize of output 28 [2021-06-12 22:07:47,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:47,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,088 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:07:47,088 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 35 treesize of output 35 [2021-06-12 22:07:47,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:47,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,113 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:07:47,113 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 32 treesize of output 28 [2021-06-12 22:07:47,115 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:47,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,129 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:07:47,130 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 39 treesize of output 1 [2021-06-12 22:07:47,130 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:47,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,151 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-12 22:07:47,151 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 39 treesize of output 25 [2021-06-12 22:07:47,152 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:47,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,177 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 22:07:47,177 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 28 treesize of output 30 [2021-06-12 22:07:47,180 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:47,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,216 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-12 22:07:47,216 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 30 treesize of output 26 [2021-06-12 22:07:47,218 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:47,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:47,239 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 23 treesize of output 41 [2021-06-12 22:07:47,245 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:47,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,266 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-12 22:07:47,267 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 28 treesize of output 26 [2021-06-12 22:07:47,268 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:47,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,289 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-12 22:07:47,290 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 30 treesize of output 25 [2021-06-12 22:07:47,291 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:47,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,312 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-12 22:07:47,312 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 33 treesize of output 25 [2021-06-12 22:07:47,313 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:47,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,327 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:07:47,327 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 37 treesize of output 1 [2021-06-12 22:07:47,328 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:47,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,341 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:07:47,341 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 34 treesize of output 1 [2021-06-12 22:07:47,341 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:47,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,355 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:07:47,355 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 39 treesize of output 1 [2021-06-12 22:07:47,355 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:47,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:47,364 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:07:47,364 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 41 treesize of output 1 [2021-06-12 22:07:47,364 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:47,466 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-06-12 22:07:47,466 INFO L628 ElimStorePlain]: treesize reduction 163, result has 39.9 percent of original size [2021-06-12 22:07:47,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:07:47,468 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:90 [2021-06-12 22:07:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:47,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728400309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:47,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:07:47,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-12 22:07:47,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917267851] [2021-06-12 22:07:47,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:07:47,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:07:47,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:07:47,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:07:47,546 INFO L87 Difference]: Start difference. First operand 1763 states and 5970 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:49,623 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-06-12 22:07:50,098 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-06-12 22:07:50,297 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-06-12 22:07:50,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:07:50,524 INFO L93 Difference]: Finished difference Result 3738 states and 11851 transitions. [2021-06-12 22:07:50,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:07:50,524 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:07:50,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:07:50,530 INFO L225 Difference]: With dead ends: 3738 [2021-06-12 22:07:50,530 INFO L226 Difference]: Without dead ends: 3681 [2021-06-12 22:07:50,530 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 2902.6ms TimeCoverageRelationStatistics Valid=639, Invalid=2553, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:07:50,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2021-06-12 22:07:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 1801. [2021-06-12 22:07:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1800 states have (on average 3.397777777777778) internal successors, (6116), 1800 states have internal predecessors, (6116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:50,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 6116 transitions. [2021-06-12 22:07:50,561 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 6116 transitions. Word has length 26 [2021-06-12 22:07:50,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:07:50,561 INFO L482 AbstractCegarLoop]: Abstraction has 1801 states and 6116 transitions. [2021-06-12 22:07:50,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 6116 transitions. [2021-06-12 22:07:50,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:07:50,563 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:07:50,563 INFO L472 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] [2021-06-12 22:07:50,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1766,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:50,769 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:07:50,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:07:50,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1512099618, now seen corresponding path program 27 times [2021-06-12 22:07:50,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:07:50,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258617525] [2021-06-12 22:07:50,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:07:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:07:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:51,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:07:51,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258617525] [2021-06-12 22:07:51,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258617525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:51,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772988858] [2021-06-12 22:07:51,270 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:51,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:07:51,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:07:51,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:07:51,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:07:51,719 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-12 22:07:51,937 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-12 22:07:52,064 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:07:52,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:07:52,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:52,185 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-12 22:07:52,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:52,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:52,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:07:52,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:52,329 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-12 22:07:52,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:52,349 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:07:52,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:07:52,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:52,487 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-12 22:07:52,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:52,505 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:07:52,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:07:52,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:52,632 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-12 22:07:52,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:52,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:52,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:07:52,651 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:52,770 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-12 22:07:52,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:52,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:52,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:07:52,787 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:52,909 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-12 22:07:52,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:52,926 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:07:52,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 22:07:52,930 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:53,046 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-12 22:07:53,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:53,061 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:07:53,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:07:53,063 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:53,174 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-12 22:07:53,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:53,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:07:53,186 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:365, output treesize:357 [2021-06-12 22:07:53,378 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-06-12 22:07:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:53,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772988858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:53,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:07:53,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:07:53,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380363884] [2021-06-12 22:07:53,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:07:53,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:07:53,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:07:53,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:07:53,491 INFO L87 Difference]: Start difference. First operand 1801 states and 6116 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:54,507 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-06-12 22:07:54,972 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-12 22:07:55,190 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-12 22:07:55,416 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-12 22:07:55,861 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-06-12 22:07:56,224 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 77 [2021-06-12 22:07:56,786 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 67 [2021-06-12 22:07:57,215 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-06-12 22:07:57,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:07:57,374 INFO L93 Difference]: Finished difference Result 2391 states and 7895 transitions. [2021-06-12 22:07:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:07:57,374 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:07:57,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:07:57,377 INFO L225 Difference]: With dead ends: 2391 [2021-06-12 22:07:57,377 INFO L226 Difference]: Without dead ends: 2361 [2021-06-12 22:07:57,378 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 4266.1ms TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:07:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-06-12 22:07:57,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1809. [2021-06-12 22:07:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.396017699115044) internal successors, (6140), 1808 states have internal predecessors, (6140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6140 transitions. [2021-06-12 22:07:57,398 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6140 transitions. Word has length 26 [2021-06-12 22:07:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:07:57,399 INFO L482 AbstractCegarLoop]: Abstraction has 1809 states and 6140 transitions. [2021-06-12 22:07:57,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:07:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6140 transitions. [2021-06-12 22:07:57,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:07:57,401 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:07:57,401 INFO L472 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] [2021-06-12 22:07:57,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1865 [2021-06-12 22:07:57,601 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:07:57,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:07:57,602 INFO L82 PathProgramCache]: Analyzing trace with hash -105433162, now seen corresponding path program 28 times [2021-06-12 22:07:57,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:07:57,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490838429] [2021-06-12 22:07:57,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:07:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:07:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:57,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:07:57,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490838429] [2021-06-12 22:07:57,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490838429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:57,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295897228] [2021-06-12 22:07:57,897 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:07:57,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:07:57,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:07:57,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:07:57,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:07:58,241 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-12 22:07:58,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:58,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:58,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:07:58,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:58,403 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-12 22:07:58,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:58,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:58,416 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:07:58,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:07:58,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:58,533 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-12 22:07:58,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:58,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:58,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:58,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:07:58,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:58,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:58,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:58,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:58,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:07:58,652 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:58,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:58,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:58,756 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:07:58,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:07:58,758 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:58,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:58,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:58,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:58,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:07:58,860 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:58,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:58,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:58,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:58,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:07:58,959 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:59,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:59,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:07:59,054 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:07:59,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:07:59,055 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:07:59,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:07:59,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:07:59,142 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-06-12 22:07:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:07:59,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295897228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:07:59,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:07:59,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:07:59,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102758712] [2021-06-12 22:07:59,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:07:59,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:07:59,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:07:59,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:07:59,315 INFO L87 Difference]: Start difference. First operand 1809 states and 6140 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:07:59,606 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-12 22:08:00,080 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-12 22:08:00,590 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-06-12 22:08:00,835 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-12 22:08:01,289 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-12 22:08:01,479 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-12 22:08:01,715 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-12 22:08:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:01,809 INFO L93 Difference]: Finished difference Result 2637 states and 8679 transitions. [2021-06-12 22:08:01,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:08:01,809 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:08:01,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:01,813 INFO L225 Difference]: With dead ends: 2637 [2021-06-12 22:08:01,813 INFO L226 Difference]: Without dead ends: 2603 [2021-06-12 22:08:01,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2673.2ms TimeCoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:08:01,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-06-12 22:08:01,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1822. [2021-06-12 22:08:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.402526084568918) internal successors, (6196), 1821 states have internal predecessors, (6196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6196 transitions. [2021-06-12 22:08:01,836 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6196 transitions. Word has length 26 [2021-06-12 22:08:01,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:01,836 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6196 transitions. [2021-06-12 22:08:01,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:08:01,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6196 transitions. [2021-06-12 22:08:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:01,838 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:01,838 INFO L472 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] [2021-06-12 22:08:02,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1892 [2021-06-12 22:08:02,039 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:02,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:02,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 29 times [2021-06-12 22:08:02,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:02,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563218694] [2021-06-12 22:08:02,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:02,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:02,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563218694] [2021-06-12 22:08:02,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563218694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:02,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467948624] [2021-06-12 22:08:02,293 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:02,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:08:02,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:02,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:08:02,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:02,778 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_156, v_prenex_158], 6=[v_prenex_157]} [2021-06-12 22:08:02,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:02,806 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:08:02,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:08:02,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:02,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:02,828 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:08:02,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:08:02,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:02,974 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-12 22:08:02,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:02,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:02,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:02,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:08:03,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:03,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:03,016 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:08:03,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:08:03,018 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:03,154 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-12 22:08:03,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:03,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:03,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:03,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:08:03,174 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:03,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:03,192 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:08:03,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-12 22:08:03,193 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:03,456 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-06-12 22:08:03,457 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.4 percent of original size [2021-06-12 22:08:03,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:03,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:03,477 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:08:03,478 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:08:03,479 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:03,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:03,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:03,495 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:08:03,500 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:03,756 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-12 22:08:03,756 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-06-12 22:08:03,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:08:03,773 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:373, output treesize:323 [2021-06-12 22:08:03,978 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-06-12 22:08:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:04,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467948624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:04,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:04,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:08:04,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910238941] [2021-06-12 22:08:04,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:08:04,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:04,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:08:04,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:08:04,068 INFO L87 Difference]: Start difference. First operand 1822 states and 6196 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:08:04,203 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 27 [2021-06-12 22:08:04,955 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-06-12 22:08:06,043 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-06-12 22:08:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:06,091 INFO L93 Difference]: Finished difference Result 2416 states and 8045 transitions. [2021-06-12 22:08:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:08:06,091 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:08:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:06,095 INFO L225 Difference]: With dead ends: 2416 [2021-06-12 22:08:06,095 INFO L226 Difference]: Without dead ends: 2391 [2021-06-12 22:08:06,095 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2209.6ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:08:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-12 22:08:06,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1822. [2021-06-12 22:08:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.402526084568918) internal successors, (6196), 1821 states have internal predecessors, (6196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:06,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6196 transitions. [2021-06-12 22:08:06,117 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6196 transitions. Word has length 26 [2021-06-12 22:08:06,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:06,117 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6196 transitions. [2021-06-12 22:08:06,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:08:06,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6196 transitions. [2021-06-12 22:08:06,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:06,119 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:06,119 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:08:06,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1908 [2021-06-12 22:08:06,319 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:06,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:06,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-06-12 22:08:06,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:06,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529989430] [2021-06-12 22:08:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:06,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:06,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529989430] [2021-06-12 22:08:06,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529989430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:06,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725473447] [2021-06-12 22:08:06,759 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:06,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:08:06,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:06,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:08:06,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:07,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,244 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 41 treesize of output 19 [2021-06-12 22:08:07,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:07,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,253 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 32 treesize of output 16 [2021-06-12 22:08:07,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:07,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,263 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 43 treesize of output 16 [2021-06-12 22:08:07,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:07,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,273 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 43 treesize of output 16 [2021-06-12 22:08:07,274 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:07,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,283 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 43 treesize of output 19 [2021-06-12 22:08:07,284 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:07,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:08:07,294 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:07,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,302 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 25 treesize of output 13 [2021-06-12 22:08:07,304 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:07,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,312 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 45 treesize of output 19 [2021-06-12 22:08:07,313 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:07,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,322 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 39 treesize of output 19 [2021-06-12 22:08:07,323 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:07,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,330 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 36 treesize of output 16 [2021-06-12 22:08:07,331 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:07,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,339 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 32 treesize of output 16 [2021-06-12 22:08:07,339 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:07,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,347 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 34 treesize of output 16 [2021-06-12 22:08:07,348 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:07,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,355 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 41 treesize of output 19 [2021-06-12 22:08:07,356 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:07,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,363 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 34 treesize of output 16 [2021-06-12 22:08:07,364 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:07,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,371 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 30 treesize of output 16 [2021-06-12 22:08:07,372 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:07,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:07,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:07,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:08:07,378 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:07,430 INFO L628 ElimStorePlain]: treesize reduction 223, result has 12.9 percent of original size [2021-06-12 22:08:07,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:08:07,431 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:21 [2021-06-12 22:08:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:07,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725473447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:07,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:07,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:08:07,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519520062] [2021-06-12 22:08:07,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:08:07,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:07,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:08:07,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:08:07,460 INFO L87 Difference]: Start difference. First operand 1822 states and 6196 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 22:08:08,000 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2021-06-12 22:08:09,114 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-06-12 22:08:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:09,173 INFO L93 Difference]: Finished difference Result 2280 states and 7549 transitions. [2021-06-12 22:08:09,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:08:09,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:08:09,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:09,176 INFO L225 Difference]: With dead ends: 2280 [2021-06-12 22:08:09,176 INFO L226 Difference]: Without dead ends: 2258 [2021-06-12 22:08:09,176 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1915.9ms TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:08:09,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-06-12 22:08:09,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 1818. [2021-06-12 22:08:09,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4012107870115575) internal successors, (6180), 1817 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:09,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6180 transitions. [2021-06-12 22:08:09,197 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6180 transitions. Word has length 26 [2021-06-12 22:08:09,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:09,197 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6180 transitions. [2021-06-12 22:08:09,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 22:08:09,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6180 transitions. [2021-06-12 22:08:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:09,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:09,199 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:08:09,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1964 [2021-06-12 22:08:09,399 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:09,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:09,400 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-06-12 22:08:09,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:09,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296744647] [2021-06-12 22:08:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:09,564 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-12 22:08:09,684 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-06-12 22:08:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:09,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:09,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296744647] [2021-06-12 22:08:09,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296744647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:09,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461098428] [2021-06-12 22:08:09,955 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:09,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:08:09,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:10,286 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_161], 5=[v_prenex_163, v_prenex_159]} [2021-06-12 22:08:10,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:10,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:10,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:10,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:10,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:08:10,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:10,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:10,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:10,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:10,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:08:10,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:10,378 INFO L628 ElimStorePlain]: treesize reduction 141, result has 40.8 percent of original size [2021-06-12 22:08:10,379 INFO L518 ElimStorePlain]: Eliminatee v_prenex_161 vanished before elimination [2021-06-12 22:08:10,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:10,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-12 22:08:10,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:10,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:10,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:10,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:10,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:10,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:10,418 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 25 treesize of output 13 [2021-06-12 22:08:10,419 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:10,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:10,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:08:10,453 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:294, output treesize:43 [2021-06-12 22:08:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:10,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461098428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:10,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:10,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:08:10,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68908765] [2021-06-12 22:08:10,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:08:10,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:10,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:08:10,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:08:10,503 INFO L87 Difference]: Start difference. First operand 1818 states and 6180 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 22:08:11,051 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2021-06-12 22:08:12,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:12,336 INFO L93 Difference]: Finished difference Result 2473 states and 8184 transitions. [2021-06-12 22:08:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:08:12,336 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:08:12,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:12,340 INFO L225 Difference]: With dead ends: 2473 [2021-06-12 22:08:12,340 INFO L226 Difference]: Without dead ends: 2458 [2021-06-12 22:08:12,340 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 2137.6ms TimeCoverageRelationStatistics Valid=327, Invalid=1313, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:08:12,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-06-12 22:08:12,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 1818. [2021-06-12 22:08:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4012107870115575) internal successors, (6180), 1817 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:12,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6180 transitions. [2021-06-12 22:08:12,361 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6180 transitions. Word has length 26 [2021-06-12 22:08:12,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:12,362 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6180 transitions. [2021-06-12 22:08:12,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 22:08:12,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6180 transitions. [2021-06-12 22:08:12,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:12,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:12,364 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:08:12,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2054,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:12,571 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:12,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:12,571 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-06-12 22:08:12,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:12,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235221521] [2021-06-12 22:08:12,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:12,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:12,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235221521] [2021-06-12 22:08:12,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235221521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:12,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759300713] [2021-06-12 22:08:12,954 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:12,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:08:12,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:12,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:08:12,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:13,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:13,498 INFO L354 Elim1Store]: treesize reduction 20, result has 55.6 percent of original size [2021-06-12 22:08:13,498 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 40 [2021-06-12 22:08:13,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:13,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:13,541 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-12 22:08:13,541 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-06-12 22:08:13,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:13,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:13,590 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-12 22:08:13,591 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 51 [2021-06-12 22:08:13,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:13,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:13,640 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-12 22:08:13,640 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 55 [2021-06-12 22:08:13,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:13,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:13,688 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:08:13,689 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 47 [2021-06-12 22:08:13,691 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:13,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:13,732 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:08:13,732 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-06-12 22:08:13,738 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:13,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:13,784 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-12 22:08:13,785 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-06-12 22:08:13,794 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:13,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:13,839 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-12 22:08:13,839 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-06-12 22:08:13,843 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:13,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:13,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:13,876 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-12 22:08:13,894 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:13,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:13,942 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-12 22:08:13,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-06-12 22:08:13,948 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:13,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:13,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:13,985 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 63 [2021-06-12 22:08:14,006 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:14,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:14,047 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:08:14,047 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2021-06-12 22:08:14,052 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:14,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:14,072 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:08:14,072 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:08:14,073 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:14,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:14,092 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:08:14,092 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:08:14,093 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:14,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:14,128 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-06-12 22:08:14,129 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 37 [2021-06-12 22:08:14,130 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:14,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:14,141 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:08:14,141 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-06-12 22:08:14,142 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:14,568 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2021-06-12 22:08:14,569 INFO L628 ElimStorePlain]: treesize reduction 411, result has 45.1 percent of original size [2021-06-12 22:08:14,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:08:14,577 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:945, output treesize:389 [2021-06-12 22:08:14,839 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-06-12 22:08:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:14,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759300713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:14,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:14,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-12 22:08:14,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947000022] [2021-06-12 22:08:14,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:08:14,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:14,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:08:14,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:08:14,939 INFO L87 Difference]: Start difference. First operand 1818 states and 6180 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:16,070 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-12 22:08:16,530 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-06-12 22:08:16,751 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-12 22:08:17,031 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-12 22:08:17,449 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-12 22:08:17,580 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-06-12 22:08:18,121 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-12 22:08:18,426 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-12 22:08:18,636 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-06-12 22:08:18,859 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-06-12 22:08:19,044 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-06-12 22:08:19,722 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-06-12 22:08:19,961 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-12 22:08:20,440 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-12 22:08:21,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:21,129 INFO L93 Difference]: Finished difference Result 3328 states and 10546 transitions. [2021-06-12 22:08:21,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:08:21,130 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:08:21,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:21,134 INFO L225 Difference]: With dead ends: 3328 [2021-06-12 22:08:21,134 INFO L226 Difference]: Without dead ends: 3272 [2021-06-12 22:08:21,135 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 6044.8ms TimeCoverageRelationStatistics Valid=856, Invalid=4400, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 22:08:21,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-06-12 22:08:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 1831. [2021-06-12 22:08:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 3.40327868852459) internal successors, (6228), 1830 states have internal predecessors, (6228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 6228 transitions. [2021-06-12 22:08:21,161 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 6228 transitions. Word has length 26 [2021-06-12 22:08:21,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:21,161 INFO L482 AbstractCegarLoop]: Abstraction has 1831 states and 6228 transitions. [2021-06-12 22:08:21,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:21,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 6228 transitions. [2021-06-12 22:08:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:21,164 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:21,164 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:08:21,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2068 [2021-06-12 22:08:21,366 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:21,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:21,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1044384706, now seen corresponding path program 51 times [2021-06-12 22:08:21,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:21,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585444716] [2021-06-12 22:08:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:21,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:21,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585444716] [2021-06-12 22:08:21,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585444716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:21,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580167962] [2021-06-12 22:08:21,762 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 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 [2021-06-12 22:08:21,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:08:21,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:21,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:08:21,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:22,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:22,368 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-12 22:08:22,368 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-06-12 22:08:22,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:22,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:22,422 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-12 22:08:22,422 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-06-12 22:08:22,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:22,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:22,463 INFO L354 Elim1Store]: treesize reduction 27, result has 40.0 percent of original size [2021-06-12 22:08:22,463 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 36 [2021-06-12 22:08:22,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:22,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:22,513 INFO L354 Elim1Store]: treesize reduction 4, result has 91.1 percent of original size [2021-06-12 22:08:22,513 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 59 [2021-06-12 22:08:22,522 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:22,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:22,541 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:08:22,542 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:08:22,542 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:22,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:22,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:22,580 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-12 22:08:22,599 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:22,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:22,645 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:08:22,645 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-06-12 22:08:22,651 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:22,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:22,692 INFO L354 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2021-06-12 22:08:22,693 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 42 [2021-06-12 22:08:22,695 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:22,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:22,744 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-12 22:08:22,744 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-06-12 22:08:22,751 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:22,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:22,794 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:08:22,794 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2021-06-12 22:08:22,799 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:22,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:22,818 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:08:22,818 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:08:22,818 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:22,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:22,852 INFO L354 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-06-12 22:08:22,852 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 29 [2021-06-12 22:08:22,853 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:22,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:22,872 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:08:22,872 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 22:08:22,873 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:22,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:22,891 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:08:22,892 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-06-12 22:08:22,892 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:22,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:22,934 INFO L354 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2021-06-12 22:08:22,935 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 48 [2021-06-12 22:08:22,937 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:22,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:22,949 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:08:22,950 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:08:22,950 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:23,430 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-12 22:08:23,430 INFO L628 ElimStorePlain]: treesize reduction 174, result has 69.4 percent of original size [2021-06-12 22:08:23,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 22:08:23,437 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:993, output treesize:461 [2021-06-12 22:08:23,715 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-06-12 22:08:23,994 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-06-12 22:08:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:24,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580167962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:24,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:24,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 22:08:24,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402139560] [2021-06-12 22:08:24,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:08:24,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:24,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:08:24,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:08:24,127 INFO L87 Difference]: Start difference. First operand 1831 states and 6228 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) 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) [2021-06-12 22:08:24,885 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 44 [2021-06-12 22:08:25,085 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-12 22:08:26,040 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-06-12 22:08:26,422 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-12 22:08:26,696 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-12 22:08:26,824 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-12 22:08:26,990 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-12 22:08:27,398 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-12 22:08:27,851 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-12 22:08:28,141 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-06-12 22:08:28,440 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-12 22:08:28,773 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 44 [2021-06-12 22:08:29,259 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-06-12 22:08:29,430 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 39 [2021-06-12 22:08:30,111 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2021-06-12 22:08:30,488 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-06-12 22:08:30,836 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-06-12 22:08:31,279 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-12 22:08:31,560 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2021-06-12 22:08:32,043 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2021-06-12 22:08:32,326 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 37 [2021-06-12 22:08:32,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:32,447 INFO L93 Difference]: Finished difference Result 3152 states and 10146 transitions. [2021-06-12 22:08:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:08:32,447 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) 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 26 [2021-06-12 22:08:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:32,451 INFO L225 Difference]: With dead ends: 3152 [2021-06-12 22:08:32,452 INFO L226 Difference]: Without dead ends: 3089 [2021-06-12 22:08:32,452 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 8520.7ms TimeCoverageRelationStatistics Valid=867, Invalid=4103, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 22:08:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2021-06-12 22:08:32,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 1811. [2021-06-12 22:08:32,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.4027624309392266) internal successors, (6159), 1810 states have internal predecessors, (6159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:32,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6159 transitions. [2021-06-12 22:08:32,479 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6159 transitions. Word has length 26 [2021-06-12 22:08:32,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:32,479 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6159 transitions. [2021-06-12 22:08:32,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) 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) [2021-06-12 22:08:32,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6159 transitions. [2021-06-12 22:08:32,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:32,481 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:32,481 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:08:32,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2243 [2021-06-12 22:08:32,681 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:32,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:32,682 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 52 times [2021-06-12 22:08:32,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:32,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57722462] [2021-06-12 22:08:32,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:33,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:33,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57722462] [2021-06-12 22:08:33,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57722462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:33,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692485491] [2021-06-12 22:08:33,018 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:08:33,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:08:33,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:33,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:08:33,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:33,670 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2021-06-12 22:08:33,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:33,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:33,888 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:08:33,888 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 26 treesize of output 32 [2021-06-12 22:08:33,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:33,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:33,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:33,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:33,915 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 21 treesize of output 37 [2021-06-12 22:08:33,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:34,180 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-06-12 22:08:34,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:34,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:34,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:34,218 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-06-12 22:08:34,218 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 31 treesize of output 39 [2021-06-12 22:08:34,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:34,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:34,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:34,251 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-06-12 22:08:34,251 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 26 treesize of output 36 [2021-06-12 22:08:34,256 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:34,519 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-12 22:08:34,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:34,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:34,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:34,547 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-12 22:08:34,547 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 28 treesize of output 24 [2021-06-12 22:08:34,549 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:34,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:34,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:34,572 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:08:34,572 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 28 treesize of output 28 [2021-06-12 22:08:34,576 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:34,995 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 115 [2021-06-12 22:08:34,995 INFO L628 ElimStorePlain]: treesize reduction 38, result has 92.7 percent of original size [2021-06-12 22:08:35,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:35,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:35,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:35,024 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 35 treesize of output 43 [2021-06-12 22:08:35,029 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:35,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:35,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:35,058 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-06-12 22:08:35,058 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 35 treesize of output 39 [2021-06-12 22:08:35,064 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:35,460 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 110 [2021-06-12 22:08:35,461 INFO L628 ElimStorePlain]: treesize reduction 47, result has 90.4 percent of original size [2021-06-12 22:08:35,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:35,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:35,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:35,491 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 35 treesize of output 43 [2021-06-12 22:08:35,502 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:35,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:35,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:35,530 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:08:35,531 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 35 treesize of output 26 [2021-06-12 22:08:35,532 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:35,707 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-12 22:08:35,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:35,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:35,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:35,735 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:08:35,736 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 33 treesize of output 31 [2021-06-12 22:08:35,739 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:35,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:35,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:35,751 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-06-12 22:08:35,751 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 33 treesize of output 1 [2021-06-12 22:08:35,752 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:35,902 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 22:08:35,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:35,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 6 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 22:08:35,914 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:621, output treesize:257 [2021-06-12 22:08:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:36,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692485491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:36,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:36,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 22:08:36,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839924598] [2021-06-12 22:08:36,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:08:36,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:36,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:08:36,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:08:36,058 INFO L87 Difference]: Start difference. First operand 1811 states and 6159 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:37,156 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-12 22:08:37,977 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-06-12 22:08:38,471 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 97 [2021-06-12 22:08:38,966 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 102 [2021-06-12 22:08:39,090 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-06-12 22:08:39,334 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-06-12 22:08:39,483 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-06-12 22:08:39,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:39,880 INFO L93 Difference]: Finished difference Result 3034 states and 9904 transitions. [2021-06-12 22:08:39,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:08:39,881 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:08:39,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:39,885 INFO L225 Difference]: With dead ends: 3034 [2021-06-12 22:08:39,885 INFO L226 Difference]: Without dead ends: 2983 [2021-06-12 22:08:39,886 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 3983.6ms TimeCoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:08:39,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2021-06-12 22:08:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 1871. [2021-06-12 22:08:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.411229946524064) internal successors, (6379), 1870 states have internal predecessors, (6379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:39,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6379 transitions. [2021-06-12 22:08:39,915 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6379 transitions. Word has length 26 [2021-06-12 22:08:39,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:39,915 INFO L482 AbstractCegarLoop]: Abstraction has 1871 states and 6379 transitions. [2021-06-12 22:08:39,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6379 transitions. [2021-06-12 22:08:39,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:39,917 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:39,917 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:08:40,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2408,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:40,118 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:40,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:40,118 INFO L82 PathProgramCache]: Analyzing trace with hash 227092556, now seen corresponding path program 53 times [2021-06-12 22:08:40,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:40,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100715601] [2021-06-12 22:08:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:40,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:40,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100715601] [2021-06-12 22:08:40,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100715601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:40,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726544589] [2021-06-12 22:08:40,442 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 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 [2021-06-12 22:08:40,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:08:40,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:40,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:08:40,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:40,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,897 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 43 treesize of output 19 [2021-06-12 22:08:40,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:40,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,905 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 36 treesize of output 16 [2021-06-12 22:08:40,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:40,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,912 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 41 treesize of output 19 [2021-06-12 22:08:40,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:40,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:08:40,920 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:40,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,936 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 39 treesize of output 19 [2021-06-12 22:08:40,937 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:40,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,945 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 34 treesize of output 16 [2021-06-12 22:08:40,945 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:40,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,952 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 41 treesize of output 16 [2021-06-12 22:08:40,953 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:40,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,960 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 45 treesize of output 16 [2021-06-12 22:08:40,960 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:40,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,967 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 32 treesize of output 13 [2021-06-12 22:08:40,968 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:40,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,974 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 30 treesize of output 13 [2021-06-12 22:08:40,975 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:40,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,982 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 32 treesize of output 16 [2021-06-12 22:08:40,983 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:40,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,990 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 34 treesize of output 16 [2021-06-12 22:08:40,990 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:40,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:40,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:40,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-06-12 22:08:40,998 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:41,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:41,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:41,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:41,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:41,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:41,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:41,005 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 43 treesize of output 13 [2021-06-12 22:08:41,005 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:41,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:41,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:41,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:41,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:41,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:41,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:41,012 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 43 treesize of output 13 [2021-06-12 22:08:41,012 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:41,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:41,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:41,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:41,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:41,016 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 25 treesize of output 7 [2021-06-12 22:08:41,017 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:41,048 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-06-12 22:08:41,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:08:41,049 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-06-12 22:08:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:41,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726544589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:41,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:41,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:08:41,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339316352] [2021-06-12 22:08:41,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:08:41,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:41,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:08:41,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:08:41,082 INFO L87 Difference]: Start difference. First operand 1871 states and 6379 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:42,388 INFO L93 Difference]: Finished difference Result 2487 states and 8126 transitions. [2021-06-12 22:08:42,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:08:42,388 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:08:42,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:42,392 INFO L225 Difference]: With dead ends: 2487 [2021-06-12 22:08:42,392 INFO L226 Difference]: Without dead ends: 2449 [2021-06-12 22:08:42,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1486.1ms TimeCoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:08:42,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-06-12 22:08:42,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1871. [2021-06-12 22:08:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.409090909090909) internal successors, (6375), 1870 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:42,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6375 transitions. [2021-06-12 22:08:42,414 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6375 transitions. Word has length 26 [2021-06-12 22:08:42,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:42,414 INFO L482 AbstractCegarLoop]: Abstraction has 1871 states and 6375 transitions. [2021-06-12 22:08:42,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:42,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6375 transitions. [2021-06-12 22:08:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:42,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:42,416 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:08:42,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2493,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:42,617 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:42,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:42,617 INFO L82 PathProgramCache]: Analyzing trace with hash -538930356, now seen corresponding path program 54 times [2021-06-12 22:08:42,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:42,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104831591] [2021-06-12 22:08:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:42,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:42,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104831591] [2021-06-12 22:08:42,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104831591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:42,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409260154] [2021-06-12 22:08:42,946 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 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 [2021-06-12 22:08:42,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:08:42,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:42,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:08:42,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:43,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,192 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-12 22:08:43,192 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 35 treesize of output 31 [2021-06-12 22:08:43,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:43,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,222 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-06-12 22:08:43,222 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 35 treesize of output 25 [2021-06-12 22:08:43,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:43,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,246 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-12 22:08:43,246 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 30 treesize of output 28 [2021-06-12 22:08:43,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:43,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,271 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-12 22:08:43,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-06-12 22:08:43,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:43,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,287 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:08:43,288 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 37 treesize of output 1 [2021-06-12 22:08:43,288 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:43,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,311 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-12 22:08:43,311 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 39 treesize of output 28 [2021-06-12 22:08:43,312 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:43,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,325 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:08:43,326 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 28 treesize of output 1 [2021-06-12 22:08:43,326 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:43,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,348 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-06-12 22:08:43,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-06-12 22:08:43,349 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:43,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,363 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:08:43,364 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 37 treesize of output 1 [2021-06-12 22:08:43,364 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:43,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,377 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:08:43,377 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 30 treesize of output 1 [2021-06-12 22:08:43,378 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:43,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,391 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:08:43,391 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 37 treesize of output 1 [2021-06-12 22:08:43,392 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:43,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,413 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-12 22:08:43,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 24 [2021-06-12 22:08:43,415 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:43,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,440 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-12 22:08:43,440 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 30 treesize of output 24 [2021-06-12 22:08:43,441 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:43,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:43,461 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 23 treesize of output 39 [2021-06-12 22:08:43,467 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:43,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,487 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-12 22:08:43,487 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 30 treesize of output 25 [2021-06-12 22:08:43,489 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:43,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:43,496 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:08:43,497 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 37 treesize of output 1 [2021-06-12 22:08:43,497 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:43,583 INFO L628 ElimStorePlain]: treesize reduction 125, result has 42.7 percent of original size [2021-06-12 22:08:43,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:08:43,584 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:705, output treesize:93 [2021-06-12 22:08:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:43,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409260154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:43,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:43,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:08:43,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119248830] [2021-06-12 22:08:43,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:08:43,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:43,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:08:43,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:08:43,675 INFO L87 Difference]: Start difference. First operand 1871 states and 6375 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:44,099 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-06-12 22:08:44,500 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-06-12 22:08:44,880 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-06-12 22:08:45,281 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-06-12 22:08:45,915 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-06-12 22:08:46,216 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-06-12 22:08:46,383 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-12 22:08:46,665 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-12 22:08:46,829 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2021-06-12 22:08:47,031 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2021-06-12 22:08:47,260 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2021-06-12 22:08:47,516 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-06-12 22:08:47,726 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 54 [2021-06-12 22:08:47,991 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2021-06-12 22:08:48,289 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 62 [2021-06-12 22:08:48,593 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-06-12 22:08:48,912 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-06-12 22:08:49,099 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-06-12 22:08:49,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:49,283 INFO L93 Difference]: Finished difference Result 3107 states and 9967 transitions. [2021-06-12 22:08:49,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:08:49,283 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:08:49,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:49,287 INFO L225 Difference]: With dead ends: 3107 [2021-06-12 22:08:49,287 INFO L226 Difference]: Without dead ends: 3069 [2021-06-12 22:08:49,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 5374.2ms TimeCoverageRelationStatistics Valid=747, Invalid=2913, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:08:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-06-12 22:08:49,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1881. [2021-06-12 22:08:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 3.4159574468085108) internal successors, (6422), 1880 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:49,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 6422 transitions. [2021-06-12 22:08:49,315 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 6422 transitions. Word has length 26 [2021-06-12 22:08:49,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:49,315 INFO L482 AbstractCegarLoop]: Abstraction has 1881 states and 6422 transitions. [2021-06-12 22:08:49,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 6422 transitions. [2021-06-12 22:08:49,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:49,317 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:49,317 INFO L472 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] [2021-06-12 22:08:49,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2589 [2021-06-12 22:08:49,518 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:49,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:49,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1644457752, now seen corresponding path program 30 times [2021-06-12 22:08:49,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:49,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967495411] [2021-06-12 22:08:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:49,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:49,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967495411] [2021-06-12 22:08:49,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967495411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:49,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803205802] [2021-06-12 22:08:49,847 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 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 [2021-06-12 22:08:49,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:08:49,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:49,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:08:49,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:50,246 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-12 22:08:50,415 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-06-12 22:08:50,462 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_191, v_prenex_189], 2=[v_prenex_190, A]} [2021-06-12 22:08:50,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:08:50,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:08:50,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,603 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-12 22:08:50,603 INFO L628 ElimStorePlain]: treesize reduction 118, result has 55.1 percent of original size [2021-06-12 22:08:50,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:08:50,608 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:50,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:08:50,663 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:50,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:08:50,711 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:50,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:50,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:08:50,715 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:50,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:50,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:08:50,753 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:293, output treesize:51 [2021-06-12 22:08:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:50,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803205802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:50,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:50,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:08:50,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240965325] [2021-06-12 22:08:50,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:08:50,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:50,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:08:50,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:08:50,809 INFO L87 Difference]: Start difference. First operand 1881 states and 6422 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:51,507 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-12 22:08:51,988 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-12 22:08:52,216 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-06-12 22:08:52,443 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-12 22:08:52,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:52,567 INFO L93 Difference]: Finished difference Result 2308 states and 7739 transitions. [2021-06-12 22:08:52,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:08:52,568 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:08:52,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:52,571 INFO L225 Difference]: With dead ends: 2308 [2021-06-12 22:08:52,571 INFO L226 Difference]: Without dead ends: 2293 [2021-06-12 22:08:52,571 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 2069.0ms TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:08:52,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-06-12 22:08:52,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1873. [2021-06-12 22:08:52,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 3.419337606837607) internal successors, (6401), 1872 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:52,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 6401 transitions. [2021-06-12 22:08:52,592 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 6401 transitions. Word has length 26 [2021-06-12 22:08:52,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:52,592 INFO L482 AbstractCegarLoop]: Abstraction has 1873 states and 6401 transitions. [2021-06-12 22:08:52,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:52,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 6401 transitions. [2021-06-12 22:08:52,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:52,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:52,594 INFO L472 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] [2021-06-12 22:08:52,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2614 [2021-06-12 22:08:52,795 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:52,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:52,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1033146674, now seen corresponding path program 31 times [2021-06-12 22:08:52,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:52,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008862242] [2021-06-12 22:08:52,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:53,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:53,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008862242] [2021-06-12 22:08:53,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008862242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:53,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795167538] [2021-06-12 22:08:53,101 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 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 [2021-06-12 22:08:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:53,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:08:53,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:53,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:53,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:08:53,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:53,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:53,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:08:53,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:53,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:53,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:08:53,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:53,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:53,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:08:53,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:53,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:53,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-12 22:08:53,451 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:53,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:53,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:08:53,457 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:53,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:53,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:08:53,462 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:53,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:53,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:08:53,468 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:53,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:53,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:08:53,473 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:53,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:53,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:08:53,478 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:53,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:53,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:08:53,483 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:53,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:53,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:08:53,488 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:53,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:53,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:08:53,494 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:53,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:53,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:08:53,499 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:53,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:53,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:53,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:08:53,503 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:53,573 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-12 22:08:53,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:08:53,574 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-12 22:08:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:53,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795167538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:53,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:53,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:08:53,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930815921] [2021-06-12 22:08:53,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:08:53,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:53,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:08:53,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:08:53,628 INFO L87 Difference]: Start difference. First operand 1873 states and 6401 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:54,007 INFO L93 Difference]: Finished difference Result 2211 states and 7445 transitions. [2021-06-12 22:08:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:08:54,008 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:08:54,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:54,010 INFO L225 Difference]: With dead ends: 2211 [2021-06-12 22:08:54,010 INFO L226 Difference]: Without dead ends: 2196 [2021-06-12 22:08:54,010 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 616.8ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:08:54,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2021-06-12 22:08:54,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 1867. [2021-06-12 22:08:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.4190782422293675) internal successors, (6380), 1866 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6380 transitions. [2021-06-12 22:08:54,031 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6380 transitions. Word has length 26 [2021-06-12 22:08:54,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:54,032 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 6380 transitions. [2021-06-12 22:08:54,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:54,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6380 transitions. [2021-06-12 22:08:54,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:54,034 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:54,034 INFO L472 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] [2021-06-12 22:08:54,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2627,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:54,253 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:54,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1034369354, now seen corresponding path program 32 times [2021-06-12 22:08:54,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:54,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788349733] [2021-06-12 22:08:54,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:54,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:54,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788349733] [2021-06-12 22:08:54,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788349733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:54,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865450310] [2021-06-12 22:08:54,596 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 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 [2021-06-12 22:08:54,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:08:54,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:08:54,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:08:54,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:54,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:54,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:54,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:08:54,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:54,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:54,907 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:08:54,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:08:54,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:54,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:54,918 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:08:54,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:08:54,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:54,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:54,930 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:08:54,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:08:54,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:54,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:54,939 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:08:54,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:08:54,940 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:54,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:54,948 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:08:54,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:08:54,949 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:54,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:54,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:54,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:08:54,962 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:54,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:54,971 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:08:54,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:08:54,972 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:54,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:54,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:54,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:08:54,985 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:54,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:54,993 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:08:54,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:08:54,994 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:54,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:55,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:55,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:08:55,011 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:55,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:55,020 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:08:55,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:08:55,020 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:55,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:55,028 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:08:55,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:08:55,028 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:55,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:55,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:55,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:08:55,039 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:55,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:55,049 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:08:55,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:08:55,050 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:55,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:55,055 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:08:55,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:08:55,056 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:55,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:55,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:08:55,137 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:174 [2021-06-12 22:08:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:55,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865450310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:55,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:55,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:08:55,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917661624] [2021-06-12 22:08:55,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:08:55,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:55,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:08:55,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:08:55,310 INFO L87 Difference]: Start difference. First operand 1867 states and 6380 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-06-12 22:08:55,811 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-06-12 22:08:56,333 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2021-06-12 22:08:56,678 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-06-12 22:08:56,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:08:56,813 INFO L93 Difference]: Finished difference Result 2784 states and 9269 transitions. [2021-06-12 22:08:56,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:08:56,814 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:08:56,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:08:56,817 INFO L225 Difference]: With dead ends: 2784 [2021-06-12 22:08:56,817 INFO L226 Difference]: Without dead ends: 2769 [2021-06-12 22:08:56,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1798.8ms TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:08:56,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-06-12 22:08:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1864. [2021-06-12 22:08:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 3.416532474503489) internal successors, (6365), 1863 states have internal predecessors, (6365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:08:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 6365 transitions. [2021-06-12 22:08:56,855 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 6365 transitions. Word has length 26 [2021-06-12 22:08:56,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:08:56,856 INFO L482 AbstractCegarLoop]: Abstraction has 1864 states and 6365 transitions. [2021-06-12 22:08:56,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-06-12 22:08:56,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 6365 transitions. [2021-06-12 22:08:56,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:08:56,858 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:08:56,858 INFO L472 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] [2021-06-12 22:08:57,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2655 [2021-06-12 22:08:57,069 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:08:57,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:08:57,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1269968860, now seen corresponding path program 33 times [2021-06-12 22:08:57,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:08:57,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066859455] [2021-06-12 22:08:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:08:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:08:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:57,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:08:57,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066859455] [2021-06-12 22:08:57,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066859455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:57,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285920393] [2021-06-12 22:08:57,409 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:08:57,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:08:57,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:57,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:08:57,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:08:57,722 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-12 22:08:57,948 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-06-12 22:08:58,023 INFO L446 ElimStorePlain]: Different costs {1=[A, v_prenex_201], 2=[v_prenex_199, v_prenex_200]} [2021-06-12 22:08:58,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:58,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:08:58,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:58,149 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-12 22:08:58,150 INFO L628 ElimStorePlain]: treesize reduction 54, result has 73.9 percent of original size [2021-06-12 22:08:58,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:58,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:08:58,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:58,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:58,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:58,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:58,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:58,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:08:58,206 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:58,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:58,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:58,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:08:58,210 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:58,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:58,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:08:58,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:08:58,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:08:58,253 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:08:58,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:08:58,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:08:58,291 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:217, output treesize:51 [2021-06-12 22:08:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:08:58,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285920393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:08:58,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:08:58,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:08:58,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912829677] [2021-06-12 22:08:58,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:08:58,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:08:58,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:08:58,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:08:58,342 INFO L87 Difference]: Start difference. First operand 1864 states and 6365 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-06-12 22:08:59,475 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-12 22:08:59,848 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-12 22:09:00,174 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-06-12 22:09:00,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:00,314 INFO L93 Difference]: Finished difference Result 2480 states and 8310 transitions. [2021-06-12 22:09:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:09:00,314 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:00,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:00,317 INFO L225 Difference]: With dead ends: 2480 [2021-06-12 22:09:00,318 INFO L226 Difference]: Without dead ends: 2465 [2021-06-12 22:09:00,318 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2314.2ms TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:09:00,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-06-12 22:09:00,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1863. [2021-06-12 22:09:00,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 3.4162191192266382) internal successors, (6361), 1862 states have internal predecessors, (6361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:00,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 6361 transitions. [2021-06-12 22:09:00,341 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 6361 transitions. Word has length 26 [2021-06-12 22:09:00,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:00,341 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 6361 transitions. [2021-06-12 22:09:00,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-06-12 22:09:00,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 6361 transitions. [2021-06-12 22:09:00,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:00,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:00,343 INFO L472 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] [2021-06-12 22:09:00,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2692,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:00,544 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:00,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:00,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1946185846, now seen corresponding path program 34 times [2021-06-12 22:09:00,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:00,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638619137] [2021-06-12 22:09:00,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:00,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:00,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638619137] [2021-06-12 22:09:00,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638619137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:00,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765585106] [2021-06-12 22:09:00,805 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 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 [2021-06-12 22:09:00,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:09:00,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:00,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:09:00,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:01,087 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-12 22:09:01,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:01,206 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:01,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:09:01,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:01,314 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-12 22:09:01,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:01,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:01,326 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:01,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:09:01,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:01,429 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-12 22:09:01,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:01,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:01,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:01,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:09:01,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:01,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:01,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:01,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:01,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:09:01,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:01,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:01,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:01,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:01,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:09:01,668 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:01,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:01,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:01,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:01,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:09:01,768 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:01,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:01,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:01,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:01,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:09:01,867 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:01,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:01,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:01,962 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:01,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:09:01,964 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:02,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:02,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:09:02,051 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-06-12 22:09:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:02,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765585106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:02,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:02,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:09:02,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588836114] [2021-06-12 22:09:02,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:09:02,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:02,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:09:02,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:09:02,219 INFO L87 Difference]: Start difference. First operand 1863 states and 6361 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-06-12 22:09:02,767 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 42 [2021-06-12 22:09:03,210 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-12 22:09:03,696 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-12 22:09:04,068 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2021-06-12 22:09:04,264 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-06-12 22:09:04,523 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-06-12 22:09:04,665 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-06-12 22:09:04,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:04,744 INFO L93 Difference]: Finished difference Result 2968 states and 9767 transitions. [2021-06-12 22:09:04,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:09:04,744 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:04,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:04,748 INFO L225 Difference]: With dead ends: 2968 [2021-06-12 22:09:04,748 INFO L226 Difference]: Without dead ends: 2938 [2021-06-12 22:09:04,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2699.0ms TimeCoverageRelationStatistics Valid=276, Invalid=984, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:09:04,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-06-12 22:09:04,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 1863. [2021-06-12 22:09:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 3.4183673469387754) internal successors, (6365), 1862 states have internal predecessors, (6365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 6365 transitions. [2021-06-12 22:09:04,773 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 6365 transitions. Word has length 26 [2021-06-12 22:09:04,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:04,773 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 6365 transitions. [2021-06-12 22:09:04,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-06-12 22:09:04,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 6365 transitions. [2021-06-12 22:09:04,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:04,775 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:04,775 INFO L472 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] [2021-06-12 22:09:04,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2701,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:04,975 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:04,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:04,976 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 35 times [2021-06-12 22:09:04,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:04,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231240840] [2021-06-12 22:09:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:05,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:05,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231240840] [2021-06-12 22:09:05,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231240840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:05,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409615939] [2021-06-12 22:09:05,305 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 [2021-06-12 22:09:05,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:09:05,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:05,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:09:05,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:05,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:05,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:05,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:05,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:05,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:05,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:05,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:05,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:09:05,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:05,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:05,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:05,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:05,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:05,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:05,716 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:05,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:05,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:05,722 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:05,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:05,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:05,727 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:05,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:05,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:05,733 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:05,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:05,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:09:05,739 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:05,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:05,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:05,745 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:05,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:05,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:09:05,751 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:05,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:05,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-12 22:09:05,757 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:05,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:05,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:05,763 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:05,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:05,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:05,768 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:05,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:05,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:05,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:09:05,772 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:05,843 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-12 22:09:05,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:09:05,844 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-12 22:09:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:05,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409615939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:05,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:05,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:09:05,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145593321] [2021-06-12 22:09:05,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:09:05,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:05,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:09:05,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:09:05,894 INFO L87 Difference]: Start difference. First operand 1863 states and 6365 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:06,650 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-12 22:09:06,800 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-12 22:09:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:06,967 INFO L93 Difference]: Finished difference Result 2374 states and 7932 transitions. [2021-06-12 22:09:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:09:06,967 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-06-12 22:09:06,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:06,970 INFO L225 Difference]: With dead ends: 2374 [2021-06-12 22:09:06,970 INFO L226 Difference]: Without dead ends: 2353 [2021-06-12 22:09:06,970 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1348.0ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:09:06,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-06-12 22:09:06,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1878. [2021-06-12 22:09:06,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 3.4214171550346295) internal successors, (6422), 1877 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 6422 transitions. [2021-06-12 22:09:06,994 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 6422 transitions. Word has length 26 [2021-06-12 22:09:06,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:06,994 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 6422 transitions. [2021-06-12 22:09:06,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:06,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 6422 transitions. [2021-06-12 22:09:06,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:06,997 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:06,997 INFO L472 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] [2021-06-12 22:09:07,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2716,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:07,197 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:07,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:07,197 INFO L82 PathProgramCache]: Analyzing trace with hash -716780640, now seen corresponding path program 36 times [2021-06-12 22:09:07,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:07,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214829193] [2021-06-12 22:09:07,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:07,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:07,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214829193] [2021-06-12 22:09:07,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214829193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:07,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213167442] [2021-06-12 22:09:07,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:09:07,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:09:07,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:07,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:09:07,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:07,741 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:07,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:09:07,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,751 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:09:07,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:09:07,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,770 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:07,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 22:09:07,773 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,789 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:09:07,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:09:07,790 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,799 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:09:07,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:09:07,800 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:07,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:09:07,816 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,826 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:09:07,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:07,826 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,845 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:07,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:09:07,848 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,857 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:09:07,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:07,858 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,866 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:09:07,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:09:07,867 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,876 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:09:07,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:09:07,876 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,884 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:09:07,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:07,885 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,893 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:09:07,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:07,894 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:07,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:09:07,913 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:07,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:09:07,928 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:07,940 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:09:07,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:09:07,942 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:08,044 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-06-12 22:09:08,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:08,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:09:08,056 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:255 [2021-06-12 22:09:08,215 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-06-12 22:09:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:08,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213167442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:08,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:08,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 22:09:08,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316898429] [2021-06-12 22:09:08,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:09:08,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:08,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:09:08,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:09:08,305 INFO L87 Difference]: Start difference. First operand 1878 states and 6422 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:09:10,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:10,099 INFO L93 Difference]: Finished difference Result 2454 states and 8038 transitions. [2021-06-12 22:09:10,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:09:10,099 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:10,103 INFO L225 Difference]: With dead ends: 2454 [2021-06-12 22:09:10,103 INFO L226 Difference]: Without dead ends: 2416 [2021-06-12 22:09:10,103 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1782.5ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:09:10,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-06-12 22:09:10,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1866. [2021-06-12 22:09:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.420911528150134) internal successors, (6380), 1865 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:10,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6380 transitions. [2021-06-12 22:09:10,126 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6380 transitions. Word has length 26 [2021-06-12 22:09:10,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:10,126 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 6380 transitions. [2021-06-12 22:09:10,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:09:10,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6380 transitions. [2021-06-12 22:09:10,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:10,128 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:10,128 INFO L472 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] [2021-06-12 22:09:10,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2744 [2021-06-12 22:09:10,344 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:10,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:10,344 INFO L82 PathProgramCache]: Analyzing trace with hash 475685792, now seen corresponding path program 37 times [2021-06-12 22:09:10,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:10,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603886542] [2021-06-12 22:09:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:10,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:10,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603886542] [2021-06-12 22:09:10,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603886542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:10,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894388156] [2021-06-12 22:09:10,587 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 [2021-06-12 22:09:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:10,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:09:10,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:10,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:10,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:09:10,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,876 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:10,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:10,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:10,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:09:10,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:10,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:09:10,901 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,912 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:10,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:09:10,913 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,924 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:10,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:09:10,925 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,934 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:10,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:09:10,934 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,943 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:10,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:10,944 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,955 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:10,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:09:10,956 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,965 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:10,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:09:10,965 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,974 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:10,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:09:10,975 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:10,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:09:10,988 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:10,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:10,997 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:10,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:09:10,998 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:11,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:11,006 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:11,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:11,006 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:11,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:11,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:11,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:09:11,017 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:11,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:11,022 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:11,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:11,023 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:11,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:11,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:09:11,121 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:180 [2021-06-12 22:09:11,267 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-06-12 22:09:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:11,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894388156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:11,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:11,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:09:11,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962110327] [2021-06-12 22:09:11,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:09:11,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:11,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:09:11,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:09:11,357 INFO L87 Difference]: Start difference. First operand 1866 states and 6380 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:11,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:11,813 INFO L93 Difference]: Finished difference Result 2282 states and 7604 transitions. [2021-06-12 22:09:11,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:09:11,813 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:11,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:11,817 INFO L225 Difference]: With dead ends: 2282 [2021-06-12 22:09:11,817 INFO L226 Difference]: Without dead ends: 2257 [2021-06-12 22:09:11,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 771.7ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:09:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-06-12 22:09:11,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1857. [2021-06-12 22:09:11,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 3.4132543103448274) internal successors, (6335), 1856 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 6335 transitions. [2021-06-12 22:09:11,840 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 6335 transitions. Word has length 26 [2021-06-12 22:09:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:11,840 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 6335 transitions. [2021-06-12 22:09:11,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 6335 transitions. [2021-06-12 22:09:11,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:11,842 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:11,842 INFO L472 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] [2021-06-12 22:09:12,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2795 [2021-06-12 22:09:12,043 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:12,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:12,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1353247494, now seen corresponding path program 38 times [2021-06-12 22:09:12,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:12,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810136752] [2021-06-12 22:09:12,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:12,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:12,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810136752] [2021-06-12 22:09:12,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810136752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:12,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781987907] [2021-06-12 22:09:12,326 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 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 [2021-06-12 22:09:12,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:09:12,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:12,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:09:12,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:12,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:12,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:12,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:12,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:12,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-12 22:09:12,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:12,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:12,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:09:12,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:12,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:12,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:09:12,636 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:12,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:12,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:12,641 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:12,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:12,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:09:12,646 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:12,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:12,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:09:12,651 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:12,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:12,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:12,657 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:12,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:12,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:12,662 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:12,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:12,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:12,667 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:12,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:12,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:12,672 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:12,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:12,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:12,677 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:12,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:12,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:12,682 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:12,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:12,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:12,687 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:12,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:12,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:12,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:12,690 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:12,759 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-12 22:09:12,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:09:12,761 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-12 22:09:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:12,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781987907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:12,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:12,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:09:12,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638252714] [2021-06-12 22:09:12,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:09:12,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:12,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:09:12,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:09:12,814 INFO L87 Difference]: Start difference. First operand 1857 states and 6335 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:13,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:13,129 INFO L93 Difference]: Finished difference Result 1943 states and 6537 transitions. [2021-06-12 22:09:13,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:09:13,129 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:13,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:13,132 INFO L225 Difference]: With dead ends: 1943 [2021-06-12 22:09:13,132 INFO L226 Difference]: Without dead ends: 1924 [2021-06-12 22:09:13,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 472.7ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:09:13,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-06-12 22:09:13,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1834. [2021-06-12 22:09:13,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 3.413529732678669) internal successors, (6257), 1833 states have internal predecessors, (6257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 6257 transitions. [2021-06-12 22:09:13,151 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 6257 transitions. Word has length 26 [2021-06-12 22:09:13,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:13,151 INFO L482 AbstractCegarLoop]: Abstraction has 1834 states and 6257 transitions. [2021-06-12 22:09:13,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:13,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 6257 transitions. [2021-06-12 22:09:13,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:13,153 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:13,153 INFO L472 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] [2021-06-12 22:09:13,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2836,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:13,354 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:13,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:13,354 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 39 times [2021-06-12 22:09:13,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:13,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57888499] [2021-06-12 22:09:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:13,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:13,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57888499] [2021-06-12 22:09:13,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57888499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:13,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198642580] [2021-06-12 22:09:13,561 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:13,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:09:13,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:13,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:09:13,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:13,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:13,980 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:13,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:09:13,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:13,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:14,001 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:14,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:09:14,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:14,146 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 22:09:14,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:14,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:14,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:14,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:09:14,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:14,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:14,185 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:09:14,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:09:14,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:14,459 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-06-12 22:09:14,460 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-06-12 22:09:14,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:14,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:14,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:09:14,479 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:14,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:14,496 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:14,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-12 22:09:14,497 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:14,732 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-12 22:09:14,733 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.1 percent of original size [2021-06-12 22:09:14,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:14,750 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:09:14,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:09:14,751 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:14,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:14,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:14,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:09:14,768 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:14,875 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-12 22:09:14,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:14,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:09:14,891 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:253 [2021-06-12 22:09:15,069 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-12 22:09:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:15,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198642580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:15,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:15,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 22:09:15,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552670712] [2021-06-12 22:09:15,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:09:15,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:15,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:09:15,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:09:15,158 INFO L87 Difference]: Start difference. First operand 1834 states and 6257 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:15,763 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-12 22:09:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:15,959 INFO L93 Difference]: Finished difference Result 2041 states and 6856 transitions. [2021-06-12 22:09:15,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:09:15,960 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-06-12 22:09:15,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:15,962 INFO L225 Difference]: With dead ends: 2041 [2021-06-12 22:09:15,962 INFO L226 Difference]: Without dead ends: 2016 [2021-06-12 22:09:15,962 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1160.8ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:09:15,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-06-12 22:09:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1816. [2021-06-12 22:09:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.41763085399449) internal successors, (6203), 1815 states have internal predecessors, (6203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:15,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 6203 transitions. [2021-06-12 22:09:15,982 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 6203 transitions. Word has length 26 [2021-06-12 22:09:15,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:15,982 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 6203 transitions. [2021-06-12 22:09:15,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:15,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 6203 transitions. [2021-06-12 22:09:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:15,985 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:15,985 INFO L472 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] [2021-06-12 22:09:16,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2864 [2021-06-12 22:09:16,185 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:16,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:16,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 40 times [2021-06-12 22:09:16,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:16,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234425905] [2021-06-12 22:09:16,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:16,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:16,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234425905] [2021-06-12 22:09:16,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234425905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:16,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724162497] [2021-06-12 22:09:16,447 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:16,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:09:16,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:16,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:09:16,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:16,777 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-12 22:09:16,882 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_232], 3=[v_prenex_233, v_prenex_234]} [2021-06-12 22:09:16,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:16,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:16,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:09:16,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:16,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:16,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:16,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:09:16,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:17,033 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-12 22:09:17,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:17,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:17,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:17,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:09:17,047 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:17,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:17,057 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:17,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:09:17,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:17,174 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-12 22:09:17,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:17,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:17,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:17,187 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:09:17,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-06-12 22:09:17,189 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:17,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:17,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:17,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:17,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:09:17,202 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:17,305 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-12 22:09:17,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:17,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:17,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:17,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:17,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-12 22:09:17,319 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:17,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:17,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:17,329 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:09:17,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 22:09:17,330 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:17,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:17,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:09:17,428 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:361, output treesize:194 [2021-06-12 22:09:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:17,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724162497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:17,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:17,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:09:17,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662341227] [2021-06-12 22:09:17,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:09:17,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:17,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:09:17,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:09:17,607 INFO L87 Difference]: Start difference. First operand 1816 states and 6203 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-06-12 22:09:17,882 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-06-12 22:09:18,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:18,443 INFO L93 Difference]: Finished difference Result 2323 states and 7788 transitions. [2021-06-12 22:09:18,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:09:18,443 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:18,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:18,447 INFO L225 Difference]: With dead ends: 2323 [2021-06-12 22:09:18,447 INFO L226 Difference]: Without dead ends: 2298 [2021-06-12 22:09:18,447 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1102.8ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:09:18,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-06-12 22:09:18,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1804. [2021-06-12 22:09:18,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.4170826400443706) internal successors, (6161), 1803 states have internal predecessors, (6161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:18,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 6161 transitions. [2021-06-12 22:09:18,468 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 6161 transitions. Word has length 26 [2021-06-12 22:09:18,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:18,468 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 6161 transitions. [2021-06-12 22:09:18,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-06-12 22:09:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 6161 transitions. [2021-06-12 22:09:18,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:18,470 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:18,470 INFO L472 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] [2021-06-12 22:09:18,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2921,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:18,671 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:18,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:18,671 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 41 times [2021-06-12 22:09:18,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:18,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084336365] [2021-06-12 22:09:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:18,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:18,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084336365] [2021-06-12 22:09:18,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084336365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:18,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899421101] [2021-06-12 22:09:18,924 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:18,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:09:18,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:18,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:09:18,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:19,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:19,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:09:19,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:19,297 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:19,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:19,308 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:09:19,313 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:19,318 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:19,330 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:09:19,335 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:19,341 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-12 22:09:19,346 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:19,351 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:09:19,356 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:19,361 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:19,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:19,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:19,365 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:19,445 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-12 22:09:19,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:09:19,447 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-12 22:09:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:19,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899421101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:19,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:19,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:09:19,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54728555] [2021-06-12 22:09:19,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:09:19,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:19,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:09:19,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:09:19,496 INFO L87 Difference]: Start difference. First operand 1804 states and 6161 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:20,336 INFO L93 Difference]: Finished difference Result 2327 states and 7784 transitions. [2021-06-12 22:09:20,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:09:20,336 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-06-12 22:09:20,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:20,339 INFO L225 Difference]: With dead ends: 2327 [2021-06-12 22:09:20,339 INFO L226 Difference]: Without dead ends: 2312 [2021-06-12 22:09:20,339 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 971.5ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:09:20,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-06-12 22:09:20,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1849. [2021-06-12 22:09:20,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.411796536796537) internal successors, (6305), 1848 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6305 transitions. [2021-06-12 22:09:20,360 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6305 transitions. Word has length 26 [2021-06-12 22:09:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:20,360 INFO L482 AbstractCegarLoop]: Abstraction has 1849 states and 6305 transitions. [2021-06-12 22:09:20,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:20,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6305 transitions. [2021-06-12 22:09:20,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:20,362 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:20,363 INFO L472 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] [2021-06-12 22:09:20,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2953,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:20,563 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:20,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:20,563 INFO L82 PathProgramCache]: Analyzing trace with hash 137480694, now seen corresponding path program 42 times [2021-06-12 22:09:20,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:20,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769438257] [2021-06-12 22:09:20,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:20,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:20,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769438257] [2021-06-12 22:09:20,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769438257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:20,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383735502] [2021-06-12 22:09:20,854 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:20,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:09:20,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:20,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:09:20,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:21,192 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:09:21,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:09:21,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,201 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:09:21,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:21,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,209 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:09:21,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:21,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,218 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:09:21,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:09:21,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,226 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:09:21,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:09:21,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:21,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:09:21,241 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,249 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:09:21,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:21,250 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,257 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:09:21,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:21,258 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,273 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:09:21,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:09:21,275 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:21,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:09:21,291 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:21,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:09:21,310 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,326 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:21,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:09:21,327 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,335 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:09:21,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:09:21,336 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,352 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:21,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:09:21,356 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,372 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:21,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 22:09:21,376 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,388 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:09:21,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:09:21,389 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:21,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:21,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:09:21,491 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:247 [2021-06-12 22:09:21,646 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-06-12 22:09:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:21,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383735502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:21,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:21,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:09:21,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233667767] [2021-06-12 22:09:21,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:09:21,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:21,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:09:21,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:09:21,752 INFO L87 Difference]: Start difference. First operand 1849 states and 6305 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:22,578 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-06-12 22:09:22,835 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-06-12 22:09:23,198 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-06-12 22:09:23,368 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-06-12 22:09:23,592 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2021-06-12 22:09:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:23,624 INFO L93 Difference]: Finished difference Result 2674 states and 8821 transitions. [2021-06-12 22:09:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:09:23,624 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-06-12 22:09:23,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:23,627 INFO L225 Difference]: With dead ends: 2674 [2021-06-12 22:09:23,627 INFO L226 Difference]: Without dead ends: 2644 [2021-06-12 22:09:23,628 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2191.5ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:09:23,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-06-12 22:09:23,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1849. [2021-06-12 22:09:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.411796536796537) internal successors, (6305), 1848 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:23,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6305 transitions. [2021-06-12 22:09:23,650 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6305 transitions. Word has length 26 [2021-06-12 22:09:23,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:23,650 INFO L482 AbstractCegarLoop]: Abstraction has 1849 states and 6305 transitions. [2021-06-12 22:09:23,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:23,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6305 transitions. [2021-06-12 22:09:23,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:23,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:23,652 INFO L472 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] [2021-06-12 22:09:23,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2985 [2021-06-12 22:09:23,853 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:23,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:23,853 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 43 times [2021-06-12 22:09:23,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:23,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352833544] [2021-06-12 22:09:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:24,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:24,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352833544] [2021-06-12 22:09:24,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352833544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:24,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838650234] [2021-06-12 22:09:24,127 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:24,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:09:24,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:24,427 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_238], 3=[A, v_prenex_240, v_prenex_236]} [2021-06-12 22:09:24,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:24,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:24,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,582 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-12 22:09:24,583 INFO L628 ElimStorePlain]: treesize reduction 158, result has 46.4 percent of original size [2021-06-12 22:09:24,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:24,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:09:24,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:24,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:24,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:24,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:24,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:09:24,677 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:24,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:24,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:09:24,714 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:335, output treesize:51 [2021-06-12 22:09:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:24,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838650234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:24,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:24,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:09:24,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252614557] [2021-06-12 22:09:24,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:09:24,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:24,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:09:24,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:09:24,768 INFO L87 Difference]: Start difference. First operand 1849 states and 6305 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:25,419 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-06-12 22:09:25,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:25,527 INFO L93 Difference]: Finished difference Result 2432 states and 8093 transitions. [2021-06-12 22:09:25,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:09:25,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-06-12 22:09:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:25,531 INFO L225 Difference]: With dead ends: 2432 [2021-06-12 22:09:25,531 INFO L226 Difference]: Without dead ends: 2402 [2021-06-12 22:09:25,531 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 985.4ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:09:25,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-06-12 22:09:25,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1851. [2021-06-12 22:09:25,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1850 states have (on average 3.4135135135135135) internal successors, (6315), 1850 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) [2021-06-12 22:09:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 6315 transitions. [2021-06-12 22:09:25,552 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 6315 transitions. Word has length 26 [2021-06-12 22:09:25,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:25,552 INFO L482 AbstractCegarLoop]: Abstraction has 1851 states and 6315 transitions. [2021-06-12 22:09:25,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:25,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 6315 transitions. [2021-06-12 22:09:25,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:25,554 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:25,554 INFO L472 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] [2021-06-12 22:09:25,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:25,755 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:25,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:25,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 44 times [2021-06-12 22:09:25,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:25,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441242136] [2021-06-12 22:09:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:26,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:26,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441242136] [2021-06-12 22:09:26,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441242136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:26,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936722212] [2021-06-12 22:09:26,039 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:26,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:09:26,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:26,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:09:26,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:26,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:26,558 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:26,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:09:26,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:26,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:26,578 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:26,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:09:26,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:26,724 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 22:09:26,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:26,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:26,746 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:26,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-06-12 22:09:26,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:26,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:26,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:26,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 37 [2021-06-12 22:09:26,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:27,049 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2021-06-12 22:09:27,050 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.7 percent of original size [2021-06-12 22:09:27,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:27,068 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:09:27,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:09:27,070 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:27,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:27,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:27,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:09:27,087 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:27,216 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-12 22:09:27,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:27,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:27,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:27,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:09:27,237 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:27,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:27,251 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:09:27,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:09:27,253 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:27,487 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-06-12 22:09:27,488 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-06-12 22:09:27,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:09:27,503 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:385, output treesize:286 [2021-06-12 22:09:27,693 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-12 22:09:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:27,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936722212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:27,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:27,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:09:27,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947512592] [2021-06-12 22:09:27,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:09:27,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:27,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:09:27,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:09:27,781 INFO L87 Difference]: Start difference. First operand 1851 states and 6315 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:28,032 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-06-12 22:09:28,285 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-06-12 22:09:28,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:28,712 INFO L93 Difference]: Finished difference Result 2442 states and 8174 transitions. [2021-06-12 22:09:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:09:28,712 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:28,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:28,715 INFO L225 Difference]: With dead ends: 2442 [2021-06-12 22:09:28,715 INFO L226 Difference]: Without dead ends: 2427 [2021-06-12 22:09:28,716 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1461.3ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:09:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-06-12 22:09:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1869. [2021-06-12 22:09:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 3.4095289079229123) internal successors, (6369), 1868 states have internal predecessors, (6369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 6369 transitions. [2021-06-12 22:09:28,737 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 6369 transitions. Word has length 26 [2021-06-12 22:09:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:28,738 INFO L482 AbstractCegarLoop]: Abstraction has 1869 states and 6369 transitions. [2021-06-12 22:09:28,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 6369 transitions. [2021-06-12 22:09:28,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:28,740 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:28,740 INFO L472 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] [2021-06-12 22:09:28,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3046,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:28,940 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:28,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:28,940 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 45 times [2021-06-12 22:09:28,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:28,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880578439] [2021-06-12 22:09:28,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:29,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:29,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880578439] [2021-06-12 22:09:29,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880578439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:29,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995505061] [2021-06-12 22:09:29,163 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:29,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:09:29,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:29,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:09:29,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:29,589 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 22:09:29,832 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-06-12 22:09:29,906 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_256, v_prenex_257], 2=[A, v_prenex_258]} [2021-06-12 22:09:29,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:29,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:09:29,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:29,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:29,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:29,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,044 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-12 22:09:30,044 INFO L628 ElimStorePlain]: treesize reduction 130, result has 54.7 percent of original size [2021-06-12 22:09:30,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:09:30,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:30,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:30,102 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:30,106 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:30,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:30,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:30,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:30,151 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:30,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:30,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:09:30,188 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:317, output treesize:51 [2021-06-12 22:09:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:30,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995505061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:30,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:30,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:09:30,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826375579] [2021-06-12 22:09:30,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:09:30,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:30,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:09:30,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:09:30,240 INFO L87 Difference]: Start difference. First operand 1869 states and 6369 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:30,852 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-12 22:09:31,087 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2021-06-12 22:09:31,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:31,209 INFO L93 Difference]: Finished difference Result 1982 states and 6684 transitions. [2021-06-12 22:09:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:09:31,209 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:31,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:31,212 INFO L225 Difference]: With dead ends: 1982 [2021-06-12 22:09:31,212 INFO L226 Difference]: Without dead ends: 1967 [2021-06-12 22:09:31,212 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1376.0ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:09:31,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-06-12 22:09:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1890. [2021-06-12 22:09:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.4060349391212283) internal successors, (6434), 1889 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:31,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6434 transitions. [2021-06-12 22:09:31,232 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6434 transitions. Word has length 26 [2021-06-12 22:09:31,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:31,232 INFO L482 AbstractCegarLoop]: Abstraction has 1890 states and 6434 transitions. [2021-06-12 22:09:31,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:31,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6434 transitions. [2021-06-12 22:09:31,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:31,234 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:31,234 INFO L472 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] [2021-06-12 22:09:31,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3107 [2021-06-12 22:09:31,434 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:31,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:31,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1962618678, now seen corresponding path program 46 times [2021-06-12 22:09:31,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:31,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736856397] [2021-06-12 22:09:31,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:31,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:31,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736856397] [2021-06-12 22:09:31,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736856397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:31,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966184354] [2021-06-12 22:09:31,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:31,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:09:31,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:31,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:09:31,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:32,064 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 22:09:32,110 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_270, v_prenex_264, v_prenex_266], 3=[v_prenex_271, v_prenex_273, v_prenex_265, v_prenex_268]} [2021-06-12 22:09:32,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:32,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:32,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:09:32,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:32,236 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-12 22:09:32,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:32,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:32,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:32,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:09:32,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:32,375 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-12 22:09:32,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:32,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:32,387 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:32,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:09:32,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:32,496 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-12 22:09:32,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:32,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:32,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:32,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:09:32,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:32,613 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-12 22:09:32,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:32,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:32,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:32,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:32,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-12 22:09:32,627 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:32,728 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-12 22:09:32,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:32,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:32,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:32,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:32,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:09:32,742 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:32,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:32,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:32,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:32,847 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:09:32,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 22:09:32,848 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:32,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:32,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:32,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:32,949 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:09:32,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-06-12 22:09:32,950 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:33,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:33,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:09:33,051 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:345, output treesize:194 [2021-06-12 22:09:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:33,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966184354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:33,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:33,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:09:33,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271681330] [2021-06-12 22:09:33,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:09:33,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:33,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:09:33,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:09:33,236 INFO L87 Difference]: Start difference. First operand 1890 states and 6434 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:33,889 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-12 22:09:34,251 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-06-12 22:09:34,444 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-06-12 22:09:34,634 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2021-06-12 22:09:34,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:34,720 INFO L93 Difference]: Finished difference Result 2744 states and 9064 transitions. [2021-06-12 22:09:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:09:34,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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 26 [2021-06-12 22:09:34,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:34,724 INFO L225 Difference]: With dead ends: 2744 [2021-06-12 22:09:34,724 INFO L226 Difference]: Without dead ends: 2714 [2021-06-12 22:09:34,724 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1840.3ms TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:09:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-06-12 22:09:34,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1888. [2021-06-12 22:09:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.408055113937467) internal successors, (6431), 1887 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6431 transitions. [2021-06-12 22:09:34,748 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6431 transitions. Word has length 26 [2021-06-12 22:09:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:34,748 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6431 transitions. [2021-06-12 22:09:34,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6431 transitions. [2021-06-12 22:09:34,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:34,750 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:34,750 INFO L472 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] [2021-06-12 22:09:34,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3122 [2021-06-12 22:09:34,951 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:34,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:34,951 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-06-12 22:09:34,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:34,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319970689] [2021-06-12 22:09:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:35,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:35,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319970689] [2021-06-12 22:09:35,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319970689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:35,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753360615] [2021-06-12 22:09:35,250 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:35,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:09:35,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:35,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:09:35,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:35,662 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-12 22:09:35,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:35,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:35,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:09:35,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:35,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:35,792 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:35,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:09:35,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:35,906 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 22:09:35,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:35,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:35,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:35,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:09:35,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:35,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:35,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:35,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:09:35,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:36,038 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 22:09:36,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:36,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:36,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:36,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:09:36,053 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:36,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:36,062 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:36,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:09:36,063 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:36,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:36,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:36,172 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:36,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:09:36,173 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:36,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:36,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:36,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:09:36,182 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:36,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:36,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:09:36,276 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:333, output treesize:174 [2021-06-12 22:09:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:36,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753360615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:36,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:36,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:09:36,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502625864] [2021-06-12 22:09:36,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:09:36,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:36,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:09:36,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:09:36,459 INFO L87 Difference]: Start difference. First operand 1888 states and 6431 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:37,248 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-06-12 22:09:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:37,301 INFO L93 Difference]: Finished difference Result 2422 states and 8105 transitions. [2021-06-12 22:09:37,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:09:37,301 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-06-12 22:09:37,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:37,304 INFO L225 Difference]: With dead ends: 2422 [2021-06-12 22:09:37,304 INFO L226 Difference]: Without dead ends: 2397 [2021-06-12 22:09:37,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1256.0ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:09:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-06-12 22:09:37,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 1888. [2021-06-12 22:09:37,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.4101748807631163) internal successors, (6435), 1887 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:37,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6435 transitions. [2021-06-12 22:09:37,327 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6435 transitions. Word has length 26 [2021-06-12 22:09:37,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:37,327 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6435 transitions. [2021-06-12 22:09:37,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:37,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6435 transitions. [2021-06-12 22:09:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:37,329 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:37,330 INFO L472 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] [2021-06-12 22:09:37,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3139 [2021-06-12 22:09:37,532 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:37,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:37,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-06-12 22:09:37,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:37,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960485113] [2021-06-12 22:09:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:37,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:37,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960485113] [2021-06-12 22:09:37,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960485113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:37,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662788913] [2021-06-12 22:09:37,816 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:37,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:09:37,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:37,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:09:37,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:38,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:38,029 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:38,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:09:38,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:38,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:38,037 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:38,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:09:38,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:38,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:38,045 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:38,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:38,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:38,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:38,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:38,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:09:38,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:38,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:38,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:38,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:09:38,072 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:38,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:38,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:38,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:09:38,084 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:38,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:38,092 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:38,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:38,093 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:38,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:38,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:38,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:09:38,105 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:38,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:38,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:38,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:09:38,119 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:38,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:38,128 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:38,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:09:38,129 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:38,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:38,137 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:38,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:09:38,138 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:38,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:38,146 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:38,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:38,147 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:38,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:38,157 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:38,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:09:38,159 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:38,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:38,175 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:38,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:09:38,177 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:38,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:38,187 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:09:38,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:09:38,189 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:38,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:38,194 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:09:38,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:09:38,195 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:38,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:38,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:09:38,264 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-12 22:09:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:38,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662788913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:38,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:38,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:09:38,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338994161] [2021-06-12 22:09:38,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:09:38,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:38,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:09:38,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:09:38,452 INFO L87 Difference]: Start difference. First operand 1888 states and 6435 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:39,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:39,220 INFO L93 Difference]: Finished difference Result 2430 states and 8144 transitions. [2021-06-12 22:09:39,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:09:39,221 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-06-12 22:09:39,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:39,224 INFO L225 Difference]: With dead ends: 2430 [2021-06-12 22:09:39,224 INFO L226 Difference]: Without dead ends: 2415 [2021-06-12 22:09:39,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 998.6ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:09:39,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-06-12 22:09:39,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1888. [2021-06-12 22:09:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.4101748807631163) internal successors, (6435), 1887 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6435 transitions. [2021-06-12 22:09:39,246 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6435 transitions. Word has length 26 [2021-06-12 22:09:39,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:39,246 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6435 transitions. [2021-06-12 22:09:39,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:39,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6435 transitions. [2021-06-12 22:09:39,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:39,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:39,249 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:09:39,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3172,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:39,449 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:39,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 55 times [2021-06-12 22:09:39,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:39,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446269970] [2021-06-12 22:09:39,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:39,851 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-06-12 22:09:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:39,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:39,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446269970] [2021-06-12 22:09:39,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446269970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:39,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8834862] [2021-06-12 22:09:39,936 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:39,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:09:39,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:40,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:40,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,431 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 41 treesize of output 16 [2021-06-12 22:09:40,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:40,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:40,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,438 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 41 treesize of output 13 [2021-06-12 22:09:40,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:40,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:40,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,446 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 39 treesize of output 19 [2021-06-12 22:09:40,447 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:40,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:40,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,453 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 39 treesize of output 13 [2021-06-12 22:09:40,454 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:40,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:40,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,461 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 39 treesize of output 16 [2021-06-12 22:09:40,462 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:40,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:40,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,469 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 28 treesize of output 13 [2021-06-12 22:09:40,469 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:40,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:40,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,476 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 35 treesize of output 19 [2021-06-12 22:09:40,477 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:40,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:40,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,484 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 28 treesize of output 13 [2021-06-12 22:09:40,484 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:40,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:40,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,491 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 34 treesize of output 16 [2021-06-12 22:09:40,491 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:40,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:40,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,498 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 35 treesize of output 19 [2021-06-12 22:09:40,499 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:40,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:40,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:09:40,506 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:40,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:40,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 22:09:40,513 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:40,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:40,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,519 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 30 treesize of output 16 [2021-06-12 22:09:40,519 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:40,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:40,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,525 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 32 treesize of output 16 [2021-06-12 22:09:40,526 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:40,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:40,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:40,529 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 30 treesize of output 16 [2021-06-12 22:09:40,530 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:40,553 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-06-12 22:09:40,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:09:40,554 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-12 22:09:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:40,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8834862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:40,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:40,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:09:40,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496525981] [2021-06-12 22:09:40,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:09:40,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:40,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:09:40,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:09:40,581 INFO L87 Difference]: Start difference. First operand 1888 states and 6435 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:41,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:41,228 INFO L93 Difference]: Finished difference Result 2457 states and 7898 transitions. [2021-06-12 22:09:41,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:09:41,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:41,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:41,232 INFO L225 Difference]: With dead ends: 2457 [2021-06-12 22:09:41,232 INFO L226 Difference]: Without dead ends: 2420 [2021-06-12 22:09:41,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1009.7ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:09:41,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2021-06-12 22:09:41,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 1914. [2021-06-12 22:09:41,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.410350235232619) internal successors, (6524), 1913 states have internal predecessors, (6524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:41,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6524 transitions. [2021-06-12 22:09:41,263 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6524 transitions. Word has length 26 [2021-06-12 22:09:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:41,263 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 6524 transitions. [2021-06-12 22:09:41,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:41,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6524 transitions. [2021-06-12 22:09:41,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:41,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:41,266 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:09:41,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3189,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:41,466 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:41,467 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 56 times [2021-06-12 22:09:41,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:41,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519508586] [2021-06-12 22:09:41,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:41,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:41,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519508586] [2021-06-12 22:09:41,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519508586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:41,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270944916] [2021-06-12 22:09:41,710 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:41,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:09:41,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:41,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:09:41,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:41,965 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-06-12 22:09:42,013 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_283, v_prenex_285], 6=[A, v_prenex_287]} [2021-06-12 22:09:42,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:42,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:42,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:42,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-06-12 22:09:42,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:42,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:42,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:42,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 22:09:42,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:42,122 INFO L628 ElimStorePlain]: treesize reduction 166, result has 44.9 percent of original size [2021-06-12 22:09:42,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:42,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-12 22:09:42,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:42,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:42,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:42,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:42,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 22:09:42,163 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:42,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:42,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:42,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:42,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:42,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 22:09:42,196 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:42,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:42,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:09:42,223 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:365, output treesize:33 [2021-06-12 22:09:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:42,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270944916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:42,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:42,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 22:09:42,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326598198] [2021-06-12 22:09:42,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:09:42,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:42,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:09:42,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:09:42,265 INFO L87 Difference]: Start difference. First operand 1914 states and 6524 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:43,106 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-12 22:09:43,258 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-06-12 22:09:43,396 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-12 22:09:43,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:43,504 INFO L93 Difference]: Finished difference Result 2392 states and 7936 transitions. [2021-06-12 22:09:43,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:09:43,504 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 26 [2021-06-12 22:09:43,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:43,508 INFO L225 Difference]: With dead ends: 2392 [2021-06-12 22:09:43,508 INFO L226 Difference]: Without dead ends: 2346 [2021-06-12 22:09:43,508 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1312.1ms TimeCoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:09:43,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-06-12 22:09:43,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1910. [2021-06-12 22:09:43,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 3.4038763750654795) internal successors, (6498), 1909 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 6498 transitions. [2021-06-12 22:09:43,529 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 6498 transitions. Word has length 26 [2021-06-12 22:09:43,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:43,529 INFO L482 AbstractCegarLoop]: Abstraction has 1910 states and 6498 transitions. [2021-06-12 22:09:43,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 6498 transitions. [2021-06-12 22:09:43,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:43,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:43,531 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:09:43,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3303 [2021-06-12 22:09:43,732 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:43,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:43,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 57 times [2021-06-12 22:09:43,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:43,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351296242] [2021-06-12 22:09:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:44,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:44,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351296242] [2021-06-12 22:09:44,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351296242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:44,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940293167] [2021-06-12 22:09:44,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:44,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:09:44,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:44,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:09:44,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:44,504 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 22:09:44,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:44,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:44,816 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-12 22:09:44,816 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 33 treesize of output 43 [2021-06-12 22:09:44,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:44,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:44,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:44,851 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 22:09:44,851 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 28 treesize of output 30 [2021-06-12 22:09:44,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:45,216 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-06-12 22:09:45,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:45,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:45,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:45,246 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:09:45,246 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 32 treesize of output 28 [2021-06-12 22:09:45,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:45,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:45,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:45,274 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:09:45,274 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 37 treesize of output 35 [2021-06-12 22:09:45,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:45,616 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-12 22:09:45,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:45,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:45,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:45,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:45,648 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 41 treesize of output 47 [2021-06-12 22:09:45,653 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:45,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:45,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:45,668 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:09:45,668 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 41 treesize of output 1 [2021-06-12 22:09:45,669 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:45,973 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-06-12 22:09:45,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:45,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:45,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:46,004 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:09:46,004 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 39 treesize of output 35 [2021-06-12 22:09:46,006 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:46,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:46,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:46,028 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:09:46,028 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 34 treesize of output 28 [2021-06-12 22:09:46,030 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:46,316 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-12 22:09:46,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:46,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:46,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:46,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:46,345 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 39 treesize of output 47 [2021-06-12 22:09:46,350 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:46,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:46,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:46,376 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:09:46,376 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 39 treesize of output 35 [2021-06-12 22:09:46,379 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:47,153 WARN L205 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 124 [2021-06-12 22:09:47,153 INFO L628 ElimStorePlain]: treesize reduction 40, result has 93.4 percent of original size [2021-06-12 22:09:47,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:47,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:47,183 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:09:47,183 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 35 treesize of output 35 [2021-06-12 22:09:47,187 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:47,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:47,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:47,199 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:09:47,199 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 35 treesize of output 1 [2021-06-12 22:09:47,200 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:47,407 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-12 22:09:47,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:47,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:47,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:47,448 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:09:47,448 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 30 treesize of output 28 [2021-06-12 22:09:47,450 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:47,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:47,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:47,472 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:09:47,473 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 30 treesize of output 32 [2021-06-12 22:09:47,477 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:47,834 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 99 [2021-06-12 22:09:47,835 INFO L628 ElimStorePlain]: treesize reduction 33, result has 92.7 percent of original size [2021-06-12 22:09:47,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:47,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:47,858 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-12 22:09:47,858 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 28 treesize of output 26 [2021-06-12 22:09:47,860 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:47,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:47,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:47,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:47,878 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 23 treesize of output 41 [2021-06-12 22:09:47,885 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:48,045 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 22:09:48,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:48,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-12 22:09:48,066 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:348 [2021-06-12 22:09:48,215 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-06-12 22:09:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:48,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940293167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:48,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:48,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:09:48,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475730353] [2021-06-12 22:09:48,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:09:48,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:48,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:09:48,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:09:48,241 INFO L87 Difference]: Start difference. First operand 1910 states and 6498 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:49,333 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-12 22:09:49,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:49,607 INFO L93 Difference]: Finished difference Result 2172 states and 7282 transitions. [2021-06-12 22:09:49,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:09:49,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 26 [2021-06-12 22:09:49,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:49,610 INFO L225 Difference]: With dead ends: 2172 [2021-06-12 22:09:49,610 INFO L226 Difference]: Without dead ends: 2157 [2021-06-12 22:09:49,611 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1617.4ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:09:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-06-12 22:09:49,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1922. [2021-06-12 22:09:49,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1921 states have (on average 3.407600208224883) internal successors, (6546), 1921 states have internal predecessors, (6546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 6546 transitions. [2021-06-12 22:09:49,634 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 6546 transitions. Word has length 26 [2021-06-12 22:09:49,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:49,634 INFO L482 AbstractCegarLoop]: Abstraction has 1922 states and 6546 transitions. [2021-06-12 22:09:49,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:49,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 6546 transitions. [2021-06-12 22:09:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:49,645 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:49,645 INFO L472 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] [2021-06-12 22:09:49,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3317,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:49,846 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:49,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:49,846 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-06-12 22:09:49,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:49,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383783726] [2021-06-12 22:09:49,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:50,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:50,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383783726] [2021-06-12 22:09:50,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383783726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:50,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073783230] [2021-06-12 22:09:50,336 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:50,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:09:50,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:50,685 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-12 22:09:50,715 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_307, v_prenex_309]} [2021-06-12 22:09:50,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:50,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,819 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-06-12 22:09:50,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:50,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:09:50,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:50,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:50,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:50,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:09:50,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:50,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:50,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:09:50,904 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-06-12 22:09:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:50,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073783230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:50,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:50,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:09:50,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699959858] [2021-06-12 22:09:50,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:09:50,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:50,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:09:50,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:09:50,955 INFO L87 Difference]: Start difference. First operand 1922 states and 6546 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:09:51,494 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-12 22:09:51,812 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-12 22:09:51,963 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-06-12 22:09:52,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:52,123 INFO L93 Difference]: Finished difference Result 2493 states and 8257 transitions. [2021-06-12 22:09:52,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:09:52,123 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:09:52,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:52,126 INFO L225 Difference]: With dead ends: 2493 [2021-06-12 22:09:52,127 INFO L226 Difference]: Without dead ends: 2478 [2021-06-12 22:09:52,127 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1491.7ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:09:52,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-06-12 22:09:52,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 1933. [2021-06-12 22:09:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 3.4078674948240164) internal successors, (6584), 1932 states have internal predecessors, (6584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:52,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 6584 transitions. [2021-06-12 22:09:52,149 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 6584 transitions. Word has length 26 [2021-06-12 22:09:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:52,149 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 6584 transitions. [2021-06-12 22:09:52,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:09:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 6584 transitions. [2021-06-12 22:09:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:52,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:52,151 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:09:52,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3386,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:52,352 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:52,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:52,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 58 times [2021-06-12 22:09:52,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:52,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049986037] [2021-06-12 22:09:52,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:52,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:52,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049986037] [2021-06-12 22:09:52,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049986037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:52,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853023821] [2021-06-12 22:09:52,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:52,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:09:52,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:52,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:09:52,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:53,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:53,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,102 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 32 treesize of output 16 [2021-06-12 22:09:53,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:53,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:53,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,108 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 30 treesize of output 16 [2021-06-12 22:09:53,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:53,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:53,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,115 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 39 treesize of output 19 [2021-06-12 22:09:53,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:53,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:53,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,122 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 35 treesize of output 19 [2021-06-12 22:09:53,123 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:53,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:53,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,129 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 30 treesize of output 16 [2021-06-12 22:09:53,129 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:53,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:53,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,135 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 39 treesize of output 13 [2021-06-12 22:09:53,136 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:53,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:53,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,143 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 41 treesize of output 13 [2021-06-12 22:09:53,144 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:53,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:53,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,150 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 28 treesize of output 13 [2021-06-12 22:09:53,151 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:53,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:53,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,158 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 41 treesize of output 16 [2021-06-12 22:09:53,158 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:53,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:53,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,164 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 35 treesize of output 19 [2021-06-12 22:09:53,165 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:53,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:53,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,171 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 39 treesize of output 16 [2021-06-12 22:09:53,172 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:53,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:53,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,177 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 34 treesize of output 16 [2021-06-12 22:09:53,178 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:53,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:53,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:09:53,184 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:53,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:53,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,190 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 28 treesize of output 13 [2021-06-12 22:09:53,190 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:53,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:53,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:09:53,193 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 33 treesize of output 13 [2021-06-12 22:09:53,194 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:53,217 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-06-12 22:09:53,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:09:53,218 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-12 22:09:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:53,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853023821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:53,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:53,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 22:09:53,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556695650] [2021-06-12 22:09:53,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:09:53,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:53,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:09:53,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:09:53,245 INFO L87 Difference]: Start difference. First operand 1933 states and 6584 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:54,013 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-12 22:09:54,511 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-12 22:09:54,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:09:54,881 INFO L93 Difference]: Finished difference Result 3085 states and 9838 transitions. [2021-06-12 22:09:54,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:09:54,881 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 26 [2021-06-12 22:09:54,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:09:54,885 INFO L225 Difference]: With dead ends: 3085 [2021-06-12 22:09:54,885 INFO L226 Difference]: Without dead ends: 3042 [2021-06-12 22:09:54,885 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1579.6ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:09:54,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2021-06-12 22:09:54,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 2025. [2021-06-12 22:09:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 3.4234189723320156) internal successors, (6929), 2024 states have internal predecessors, (6929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:54,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 6929 transitions. [2021-06-12 22:09:54,911 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 6929 transitions. Word has length 26 [2021-06-12 22:09:54,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:09:54,911 INFO L482 AbstractCegarLoop]: Abstraction has 2025 states and 6929 transitions. [2021-06-12 22:09:54,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:54,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 6929 transitions. [2021-06-12 22:09:54,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:09:54,913 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:09:54,913 INFO L472 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] [2021-06-12 22:09:55,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3395 [2021-06-12 22:09:55,114 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:09:55,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:09:55,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 50 times [2021-06-12 22:09:55,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:09:55,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312545207] [2021-06-12 22:09:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:09:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:09:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:55,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:09:55,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312545207] [2021-06-12 22:09:55,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312545207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:55,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757093015] [2021-06-12 22:09:55,506 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:09:55,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:09:55,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:09:55,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:09:55,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:09:55,997 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-12 22:09:56,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:56,597 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:09:56,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:09:56,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:56,749 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-12 22:09:56,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:56,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:56,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:56,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:09:56,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:56,928 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-12 22:09:56,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:56,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:56,952 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:56,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:09:56,969 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:57,113 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-06-12 22:09:57,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:57,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:57,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:57,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:09:57,134 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:57,279 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-06-12 22:09:57,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:57,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:57,299 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:09:57,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:09:57,300 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:57,443 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-12 22:09:57,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:57,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:57,465 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:57,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 22:09:57,469 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:57,606 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 22:09:57,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:57,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:57,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:57,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:09:57,629 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:57,759 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-12 22:09:57,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:57,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:09:57,781 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:09:57,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:09:57,783 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:09:57,912 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-12 22:09:57,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:09:57,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:09:57,934 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:381, output treesize:513 [2021-06-12 22:09:58,287 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-06-12 22:09:58,543 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-12 22:09:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:09:58,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757093015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:09:58,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:09:58,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:09:58,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25725003] [2021-06-12 22:09:58,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:09:58,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:09:58,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:09:58,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:09:58,648 INFO L87 Difference]: Start difference. First operand 2025 states and 6929 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:09:59,049 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-12 22:09:59,522 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2021-06-12 22:10:00,231 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2021-06-12 22:10:00,847 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2021-06-12 22:10:01,088 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-06-12 22:10:01,583 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 120 [2021-06-12 22:10:02,099 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 94 [2021-06-12 22:10:02,584 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2021-06-12 22:10:03,190 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 138 [2021-06-12 22:10:03,600 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-06-12 22:10:04,135 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 140 [2021-06-12 22:10:04,464 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 84 [2021-06-12 22:10:04,922 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2021-06-12 22:10:05,380 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2021-06-12 22:10:05,681 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-06-12 22:10:06,276 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 91 [2021-06-12 22:10:06,577 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 42 [2021-06-12 22:10:07,014 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 57 [2021-06-12 22:10:07,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:07,130 INFO L93 Difference]: Finished difference Result 2870 states and 9420 transitions. [2021-06-12 22:10:07,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:10:07,131 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-06-12 22:10:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:07,134 INFO L225 Difference]: With dead ends: 2870 [2021-06-12 22:10:07,134 INFO L226 Difference]: Without dead ends: 2855 [2021-06-12 22:10:07,135 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 8744.8ms TimeCoverageRelationStatistics Valid=408, Invalid=2142, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:10:07,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2021-06-12 22:10:07,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2033. [2021-06-12 22:10:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.4247047244094486) internal successors, (6959), 2032 states have internal predecessors, (6959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:07,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 6959 transitions. [2021-06-12 22:10:07,159 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 6959 transitions. Word has length 26 [2021-06-12 22:10:07,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:07,159 INFO L482 AbstractCegarLoop]: Abstraction has 2033 states and 6959 transitions. [2021-06-12 22:10:07,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:07,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 6959 transitions. [2021-06-12 22:10:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:07,162 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:07,162 INFO L472 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] [2021-06-12 22:10:07,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3501,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:07,363 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:07,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:07,363 INFO L82 PathProgramCache]: Analyzing trace with hash 719147274, now seen corresponding path program 51 times [2021-06-12 22:10:07,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:07,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599758090] [2021-06-12 22:10:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:07,645 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-06-12 22:10:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:07,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:07,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599758090] [2021-06-12 22:10:07,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599758090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:07,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532544341] [2021-06-12 22:10:07,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:07,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:10:07,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:07,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:10:07,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:08,150 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-12 22:10:08,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:08,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:08,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:10:08,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:08,314 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-12 22:10:08,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:08,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:08,327 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:08,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:10:08,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:08,449 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-12 22:10:08,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:08,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:08,462 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:08,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:10:08,463 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:08,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:08,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:08,575 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:08,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:10:08,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:08,678 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-12 22:10:08,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:08,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:08,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:08,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:10:08,691 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:08,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:08,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:08,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:08,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:10:08,815 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:08,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:08,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:08,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:08,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:10:08,923 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:09,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:09,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:09,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:09,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:10:09,033 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:09,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:09,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:10:09,126 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-06-12 22:10:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:09,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532544341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:09,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:09,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:10:09,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273044079] [2021-06-12 22:10:09,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:10:09,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:09,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:10:09,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:10:09,298 INFO L87 Difference]: Start difference. First operand 2033 states and 6959 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:10:09,688 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-06-12 22:10:10,692 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-12 22:10:10,839 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-06-12 22:10:11,041 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-12 22:10:11,210 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2021-06-12 22:10:11,567 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-12 22:10:11,756 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-06-12 22:10:11,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:11,872 INFO L93 Difference]: Finished difference Result 2982 states and 9848 transitions. [2021-06-12 22:10:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:10:11,872 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:11,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:11,876 INFO L225 Difference]: With dead ends: 2982 [2021-06-12 22:10:11,876 INFO L226 Difference]: Without dead ends: 2967 [2021-06-12 22:10:11,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2673.9ms TimeCoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:10:11,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-06-12 22:10:11,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2028. [2021-06-12 22:10:11,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 3.4257523433645782) internal successors, (6944), 2027 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 6944 transitions. [2021-06-12 22:10:11,903 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 6944 transitions. Word has length 26 [2021-06-12 22:10:11,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:11,903 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 6944 transitions. [2021-06-12 22:10:11,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:10:11,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 6944 transitions. [2021-06-12 22:10:11,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:11,905 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:11,905 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:10:12,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3567 [2021-06-12 22:10:12,106 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:12,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:12,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 59 times [2021-06-12 22:10:12,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:12,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189251484] [2021-06-12 22:10:12,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:12,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:12,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189251484] [2021-06-12 22:10:12,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189251484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:12,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875298157] [2021-06-12 22:10:12,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:10:12,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:10:12,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:12,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:10:12,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:12,796 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-12 22:10:13,151 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 116 [2021-06-12 22:10:13,371 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 66 [2021-06-12 22:10:13,585 INFO L446 ElimStorePlain]: Different costs {20=[v_prenex_385], 27=[A]} [2021-06-12 22:10:13,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:13,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:13,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:13,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:13,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:13,594 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 30 treesize of output 16 [2021-06-12 22:10:13,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:13,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:13,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:13,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:13,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:13,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 22:10:13,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:13,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:13,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:13,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:13,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:13,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:10:13,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:13,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:13,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:13,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:13,620 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 30 treesize of output 13 [2021-06-12 22:10:13,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:13,745 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-06-12 22:10:13,746 INFO L628 ElimStorePlain]: treesize reduction 114, result has 56.3 percent of original size [2021-06-12 22:10:13,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:13,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 22:10:13,752 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:13,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:13,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:13,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:10:13,756 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:13,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:13,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:10:13,812 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 11 variables, input treesize:399, output treesize:89 [2021-06-12 22:10:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:13,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875298157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:13,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:13,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-12 22:10:13,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288109905] [2021-06-12 22:10:13,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:10:13,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:13,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:10:13,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:10:13,886 INFO L87 Difference]: Start difference. First operand 2028 states and 6944 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:14,632 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 22:10:15,083 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 97 [2021-06-12 22:10:15,279 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-12 22:10:15,636 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 71 [2021-06-12 22:10:16,006 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-06-12 22:10:16,295 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2021-06-12 22:10:16,682 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 102 [2021-06-12 22:10:17,066 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 125 [2021-06-12 22:10:17,336 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 47 [2021-06-12 22:10:17,767 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2021-06-12 22:10:17,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:17,877 INFO L93 Difference]: Finished difference Result 3633 states and 11658 transitions. [2021-06-12 22:10:17,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:10:17,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:17,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:17,883 INFO L225 Difference]: With dead ends: 3633 [2021-06-12 22:10:17,883 INFO L226 Difference]: Without dead ends: 3546 [2021-06-12 22:10:17,883 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 4293.9ms TimeCoverageRelationStatistics Valid=391, Invalid=1679, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:10:17,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-06-12 22:10:17,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2151. [2021-06-12 22:10:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 3.4288372093023254) internal successors, (7372), 2150 states have internal predecessors, (7372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 7372 transitions. [2021-06-12 22:10:17,914 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 7372 transitions. Word has length 26 [2021-06-12 22:10:17,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:17,914 INFO L482 AbstractCegarLoop]: Abstraction has 2151 states and 7372 transitions. [2021-06-12 22:10:17,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:17,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 7372 transitions. [2021-06-12 22:10:17,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:17,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:17,916 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:10:18,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3582 [2021-06-12 22:10:18,117 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:18,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:18,117 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 60 times [2021-06-12 22:10:18,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:18,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760923432] [2021-06-12 22:10:18,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:18,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:18,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760923432] [2021-06-12 22:10:18,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760923432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:18,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736865556] [2021-06-12 22:10:18,360 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:18,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:10:18,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:18,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:10:18,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:18,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:18,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 53 [2021-06-12 22:10:18,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:10:18,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,685 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-12 22:10:18,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 44 [2021-06-12 22:10:18,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,724 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-12 22:10:18,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 40 [2021-06-12 22:10:18,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,746 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:10:18,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 22:10:18,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,773 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-12 22:10:18,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 27 [2021-06-12 22:10:18,774 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,800 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-12 22:10:18,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:10:18,801 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,819 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:10:18,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-06-12 22:10:18,820 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,837 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:10:18,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 1 [2021-06-12 22:10:18,838 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,855 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:10:18,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 22:10:18,856 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,874 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:10:18,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-06-12 22:10:18,875 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,892 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:10:18,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-06-12 22:10:18,892 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,909 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:10:18,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 1 [2021-06-12 22:10:18,909 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,926 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:10:18,926 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 34 treesize of output 1 [2021-06-12 22:10:18,926 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,962 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-12 22:10:18,963 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 27 treesize of output 20 [2021-06-12 22:10:18,964 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:18,981 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:10:18,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 1 [2021-06-12 22:10:18,982 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:18,985 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 22:10:18,986 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:19,094 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2021-06-12 22:10:19,095 INFO L628 ElimStorePlain]: treesize reduction 115, result has 45.2 percent of original size [2021-06-12 22:10:19,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:10:19,096 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:95 [2021-06-12 22:10:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:19,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736865556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:19,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:19,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 22:10:19,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71842492] [2021-06-12 22:10:19,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:10:19,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:19,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:10:19,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:10:19,260 INFO L87 Difference]: Start difference. First operand 2151 states and 7372 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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) [2021-06-12 22:10:20,527 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2021-06-12 22:10:20,898 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-12 22:10:21,108 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-06-12 22:10:21,425 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-06-12 22:10:21,698 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-06-12 22:10:22,112 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-06-12 22:10:22,308 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2021-06-12 22:10:22,631 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 36 [2021-06-12 22:10:22,806 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-06-12 22:10:23,141 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2021-06-12 22:10:23,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:23,259 INFO L93 Difference]: Finished difference Result 3952 states and 12614 transitions. [2021-06-12 22:10:23,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:10:23,259 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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 26 [2021-06-12 22:10:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:23,264 INFO L225 Difference]: With dead ends: 3952 [2021-06-12 22:10:23,264 INFO L226 Difference]: Without dead ends: 3864 [2021-06-12 22:10:23,264 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 3612.9ms TimeCoverageRelationStatistics Valid=560, Invalid=2980, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:10:23,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-06-12 22:10:23,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 2137. [2021-06-12 22:10:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.431179775280899) internal successors, (7329), 2136 states have internal predecessors, (7329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:23,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 7329 transitions. [2021-06-12 22:10:23,296 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 7329 transitions. Word has length 26 [2021-06-12 22:10:23,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:23,296 INFO L482 AbstractCegarLoop]: Abstraction has 2137 states and 7329 transitions. [2021-06-12 22:10:23,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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) [2021-06-12 22:10:23,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 7329 transitions. [2021-06-12 22:10:23,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:23,298 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:23,298 INFO L472 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] [2021-06-12 22:10:23,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3604 [2021-06-12 22:10:23,501 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:23,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1912368818, now seen corresponding path program 52 times [2021-06-12 22:10:23,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:23,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311576269] [2021-06-12 22:10:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:23,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:23,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311576269] [2021-06-12 22:10:23,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311576269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:23,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283146718] [2021-06-12 22:10:23,890 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:23,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:10:23,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:23,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:10:23,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:24,238 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-12 22:10:24,458 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_397, v_prenex_398]} [2021-06-12 22:10:24,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:24,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:10:24,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:24,562 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-06-12 22:10:24,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:24,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:24,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:24,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:24,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:24,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:24,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:24,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:24,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:24,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:24,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:24,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:24,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:10:24,617 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:24,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:24,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:10:24,652 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-06-12 22:10:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:24,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283146718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:24,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:24,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:10:24,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357625877] [2021-06-12 22:10:24,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:10:24,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:24,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:10:24,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:10:24,705 INFO L87 Difference]: Start difference. First operand 2137 states and 7329 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:10:25,549 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-06-12 22:10:25,713 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-12 22:10:26,087 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-12 22:10:26,295 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-06-12 22:10:26,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:26,441 INFO L93 Difference]: Finished difference Result 2703 states and 9088 transitions. [2021-06-12 22:10:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:10:26,442 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:26,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:26,445 INFO L225 Difference]: With dead ends: 2703 [2021-06-12 22:10:26,445 INFO L226 Difference]: Without dead ends: 2688 [2021-06-12 22:10:26,445 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2016.5ms TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:10:26,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-06-12 22:10:26,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2150. [2021-06-12 22:10:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 3.4290367612843182) internal successors, (7369), 2149 states have internal predecessors, (7369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:26,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 7369 transitions. [2021-06-12 22:10:26,471 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 7369 transitions. Word has length 26 [2021-06-12 22:10:26,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:26,471 INFO L482 AbstractCegarLoop]: Abstraction has 2150 states and 7369 transitions. [2021-06-12 22:10:26,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:10:26,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 7369 transitions. [2021-06-12 22:10:26,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:26,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:26,473 INFO L472 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] [2021-06-12 22:10:26,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3636,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:26,689 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:26,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:26,689 INFO L82 PathProgramCache]: Analyzing trace with hash 294836038, now seen corresponding path program 53 times [2021-06-12 22:10:26,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:26,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634452390] [2021-06-12 22:10:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:26,940 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-06-12 22:10:27,055 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-12 22:10:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:27,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:27,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634452390] [2021-06-12 22:10:27,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634452390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:27,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181178544] [2021-06-12 22:10:27,159 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:27,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:10:27,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:27,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:10:27,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:27,711 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-12 22:10:27,807 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_421, v_prenex_410, v_prenex_412], 6=[v_prenex_415, v_prenex_405, v_prenex_418, v_prenex_408]} [2021-06-12 22:10:27,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:27,834 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:10:27,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-12 22:10:27,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,172 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 156 [2021-06-12 22:10:28,173 INFO L628 ElimStorePlain]: treesize reduction 226, result has 61.6 percent of original size [2021-06-12 22:10:28,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,196 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:10:28,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:10:28,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,336 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-12 22:10:28,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:28,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,361 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:10:28,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:10:28,364 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,503 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-06-12 22:10:28,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:28,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:28,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:10:28,527 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,785 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 142 [2021-06-12 22:10:28,786 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.3 percent of original size [2021-06-12 22:10:28,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:28,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:10:28,808 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:28,929 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-12 22:10:28,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:28,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:28,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:28,947 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:10:28,962 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:29,208 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 125 [2021-06-12 22:10:29,208 INFO L628 ElimStorePlain]: treesize reduction 12, result has 96.0 percent of original size [2021-06-12 22:10:29,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:29,226 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:10:29,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:10:29,228 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:29,336 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-12 22:10:29,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:29,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:29,362 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:10:29,362 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:10:29,363 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:29,477 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-12 22:10:29,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:29,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:10:29,494 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:599, output treesize:334 [2021-06-12 22:10:29,704 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-12 22:10:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:29,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181178544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:29,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:29,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:10:29,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032374478] [2021-06-12 22:10:29,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:10:29,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:29,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:10:29,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:10:29,800 INFO L87 Difference]: Start difference. First operand 2150 states and 7369 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:30,420 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 32 [2021-06-12 22:10:30,848 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-06-12 22:10:31,055 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-12 22:10:31,375 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-06-12 22:10:31,578 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-06-12 22:10:31,928 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-06-12 22:10:32,166 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-12 22:10:32,563 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 103 [2021-06-12 22:10:32,911 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-06-12 22:10:32,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:32,979 INFO L93 Difference]: Finished difference Result 3064 states and 10226 transitions. [2021-06-12 22:10:32,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:10:32,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-06-12 22:10:32,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:32,983 INFO L225 Difference]: With dead ends: 3064 [2021-06-12 22:10:32,983 INFO L226 Difference]: Without dead ends: 3049 [2021-06-12 22:10:32,984 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 3576.6ms TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 22:10:32,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-06-12 22:10:33,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2147. [2021-06-12 22:10:33,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.428238583410997) internal successors, (7357), 2146 states have internal predecessors, (7357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 7357 transitions. [2021-06-12 22:10:33,010 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 7357 transitions. Word has length 26 [2021-06-12 22:10:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:33,010 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 7357 transitions. [2021-06-12 22:10:33,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:33,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 7357 transitions. [2021-06-12 22:10:33,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:33,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:33,012 INFO L472 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] [2021-06-12 22:10:33,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3646,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:33,213 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:33,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:33,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 54 times [2021-06-12 22:10:33,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:33,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426495621] [2021-06-12 22:10:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:33,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:33,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426495621] [2021-06-12 22:10:33,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426495621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:33,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517612880] [2021-06-12 22:10:33,588 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:33,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:10:33,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:33,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:10:33,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:33,945 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-12 22:10:33,995 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_426, v_prenex_425], 6=[A, v_prenex_427]} [2021-06-12 22:10:34,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:34,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-06-12 22:10:34,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:34,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,022 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:10:34,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 22:10:34,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:34,156 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-12 22:10:34,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:34,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:34,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-06-12 22:10:34,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:34,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,184 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:10:34,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-06-12 22:10:34,185 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:34,305 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-12 22:10:34,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:34,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:34,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:34,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:34,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 22:10:34,323 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:34,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:34,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,335 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:10:34,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-06-12 22:10:34,336 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:34,442 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 22:10:34,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:34,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:34,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:34,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:34,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 22:10:34,459 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:34,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:34,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:34,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:34,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 22:10:34,472 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:34,575 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-06-12 22:10:34,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:34,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:10:34,582 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:409, output treesize:246 [2021-06-12 22:10:34,734 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-06-12 22:10:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:34,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517612880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:34,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:34,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:10:34,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006831090] [2021-06-12 22:10:34,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:10:34,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:34,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:10:34,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:10:34,819 INFO L87 Difference]: Start difference. First operand 2147 states and 7357 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:10:35,507 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-12 22:10:36,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:36,293 INFO L93 Difference]: Finished difference Result 2844 states and 9528 transitions. [2021-06-12 22:10:36,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:10:36,293 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:36,298 INFO L225 Difference]: With dead ends: 2844 [2021-06-12 22:10:36,298 INFO L226 Difference]: Without dead ends: 2819 [2021-06-12 22:10:36,298 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1789.4ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:10:36,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2021-06-12 22:10:36,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2143. [2021-06-12 22:10:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.429971988795518) internal successors, (7347), 2142 states have internal predecessors, (7347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7347 transitions. [2021-06-12 22:10:36,327 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7347 transitions. Word has length 26 [2021-06-12 22:10:36,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:36,327 INFO L482 AbstractCegarLoop]: Abstraction has 2143 states and 7347 transitions. [2021-06-12 22:10:36,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:10:36,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7347 transitions. [2021-06-12 22:10:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:36,329 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:36,329 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:10:36,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3692,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:36,530 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:36,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:36,530 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 61 times [2021-06-12 22:10:36,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:36,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568887156] [2021-06-12 22:10:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:36,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:36,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568887156] [2021-06-12 22:10:36,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568887156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:36,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520727321] [2021-06-12 22:10:36,861 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:36,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:10:36,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:37,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:37,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,353 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 35 treesize of output 19 [2021-06-12 22:10:37,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:37,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:37,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:10:37,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:37,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:37,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,366 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 35 treesize of output 19 [2021-06-12 22:10:37,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:37,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:37,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,373 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 30 treesize of output 16 [2021-06-12 22:10:37,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:37,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:37,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,380 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 41 treesize of output 13 [2021-06-12 22:10:37,381 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:37,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:37,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,387 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 28 treesize of output 13 [2021-06-12 22:10:37,388 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:37,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:37,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,394 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 34 treesize of output 16 [2021-06-12 22:10:37,395 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:37,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:37,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,401 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 39 treesize of output 13 [2021-06-12 22:10:37,402 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:37,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:37,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,408 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 33 treesize of output 13 [2021-06-12 22:10:37,409 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:37,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:37,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,415 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 30 treesize of output 16 [2021-06-12 22:10:37,415 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:37,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:37,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,422 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 41 treesize of output 16 [2021-06-12 22:10:37,422 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:37,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:37,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,433 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 32 treesize of output 16 [2021-06-12 22:10:37,433 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:37,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:37,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,440 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 28 treesize of output 13 [2021-06-12 22:10:37,440 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:37,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:37,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,446 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 39 treesize of output 16 [2021-06-12 22:10:37,447 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:37,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:37,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:37,450 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 39 treesize of output 19 [2021-06-12 22:10:37,451 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:37,475 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-06-12 22:10:37,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:10:37,476 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-12 22:10:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:37,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520727321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:37,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:37,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 22:10:37,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436392559] [2021-06-12 22:10:37,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:10:37,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:37,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:10:37,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:10:37,493 INFO L87 Difference]: Start difference. First operand 2143 states and 7347 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:38,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:38,801 INFO L93 Difference]: Finished difference Result 2873 states and 9612 transitions. [2021-06-12 22:10:38,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:10:38,801 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:38,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:38,804 INFO L225 Difference]: With dead ends: 2873 [2021-06-12 22:10:38,804 INFO L226 Difference]: Without dead ends: 2851 [2021-06-12 22:10:38,805 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1319.1ms TimeCoverageRelationStatistics Valid=334, Invalid=1148, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:10:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-06-12 22:10:38,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2169. [2021-06-12 22:10:38,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 3.4321955719557193) internal successors, (7441), 2168 states have internal predecessors, (7441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 7441 transitions. [2021-06-12 22:10:38,830 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 7441 transitions. Word has length 26 [2021-06-12 22:10:38,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:38,830 INFO L482 AbstractCegarLoop]: Abstraction has 2169 states and 7441 transitions. [2021-06-12 22:10:38,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 7441 transitions. [2021-06-12 22:10:38,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:38,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:38,833 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:10:39,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3713 [2021-06-12 22:10:39,033 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:39,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:39,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1861203518, now seen corresponding path program 62 times [2021-06-12 22:10:39,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:39,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151768657] [2021-06-12 22:10:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:39,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:39,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151768657] [2021-06-12 22:10:39,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151768657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:39,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526552597] [2021-06-12 22:10:39,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:39,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:10:39,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:39,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:10:39,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:39,589 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-12 22:10:39,639 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_428, v_prenex_432], 5=[A, v_prenex_430]} [2021-06-12 22:10:39,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:39,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:39,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:39,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:39,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:10:39,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:39,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:39,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:39,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:39,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:10:39,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:39,738 INFO L628 ElimStorePlain]: treesize reduction 147, result has 42.6 percent of original size [2021-06-12 22:10:39,738 INFO L518 ElimStorePlain]: Eliminatee v_prenex_432 vanished before elimination [2021-06-12 22:10:39,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:39,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:39,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:39,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:39,743 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 25 treesize of output 13 [2021-06-12 22:10:39,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:39,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:39,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:39,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:39,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:39,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 22:10:39,774 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:39,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:39,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:10:39,799 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:314, output treesize:33 [2021-06-12 22:10:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:39,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526552597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:39,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:39,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:10:39,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641769843] [2021-06-12 22:10:39,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:10:39,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:39,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:10:39,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:10:39,850 INFO L87 Difference]: Start difference. First operand 2169 states and 7441 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 22:10:41,276 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-12 22:10:41,395 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-12 22:10:41,535 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-12 22:10:41,684 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-12 22:10:41,813 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-12 22:10:42,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:42,035 INFO L93 Difference]: Finished difference Result 3222 states and 10652 transitions. [2021-06-12 22:10:42,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:10:42,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:42,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:42,040 INFO L225 Difference]: With dead ends: 3222 [2021-06-12 22:10:42,040 INFO L226 Difference]: Without dead ends: 3182 [2021-06-12 22:10:42,040 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 2231.1ms TimeCoverageRelationStatistics Valid=527, Invalid=1825, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:10:42,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-06-12 22:10:42,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 2156. [2021-06-12 22:10:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.432018561484919) internal successors, (7396), 2155 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 7396 transitions. [2021-06-12 22:10:42,066 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 7396 transitions. Word has length 26 [2021-06-12 22:10:42,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:42,066 INFO L482 AbstractCegarLoop]: Abstraction has 2156 states and 7396 transitions. [2021-06-12 22:10:42,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 22:10:42,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 7396 transitions. [2021-06-12 22:10:42,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:42,069 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:42,069 INFO L472 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] [2021-06-12 22:10:42,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3819 [2021-06-12 22:10:42,270 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:42,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:42,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1633671286, now seen corresponding path program 55 times [2021-06-12 22:10:42,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:42,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372182170] [2021-06-12 22:10:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:42,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:42,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372182170] [2021-06-12 22:10:42,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372182170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:42,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924997104] [2021-06-12 22:10:42,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:42,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:10:42,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:43,063 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 22:10:43,294 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-06-12 22:10:43,346 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_443, v_prenex_444], 2=[A, v_prenex_445]} [2021-06-12 22:10:43,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:43,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 22:10:43,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:43,456 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-12 22:10:43,457 INFO L628 ElimStorePlain]: treesize reduction 54, result has 72.3 percent of original size [2021-06-12 22:10:43,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:43,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:10:43,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:43,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:43,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:43,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:43,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:43,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:43,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:43,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:43,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:43,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:43,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:10:43,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:43,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:43,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:10:43,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:10:43,559 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:43,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:43,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:10:43,593 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:207, output treesize:51 [2021-06-12 22:10:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:43,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924997104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:43,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:43,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:10:43,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338782836] [2021-06-12 22:10:43,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:10:43,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:43,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:10:43,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:10:43,645 INFO L87 Difference]: Start difference. First operand 2156 states and 7396 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:10:44,444 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-12 22:10:44,823 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2021-06-12 22:10:44,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:44,930 INFO L93 Difference]: Finished difference Result 2279 states and 7717 transitions. [2021-06-12 22:10:44,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:10:44,930 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:44,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:44,933 INFO L225 Difference]: With dead ends: 2279 [2021-06-12 22:10:44,933 INFO L226 Difference]: Without dead ends: 2264 [2021-06-12 22:10:44,933 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1841.6ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:10:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-12 22:10:44,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2159. [2021-06-12 22:10:44,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2158 states have (on average 3.4300278035217793) internal successors, (7402), 2158 states have internal predecessors, (7402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:44,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 7402 transitions. [2021-06-12 22:10:44,955 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 7402 transitions. Word has length 26 [2021-06-12 22:10:44,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:44,955 INFO L482 AbstractCegarLoop]: Abstraction has 2159 states and 7402 transitions. [2021-06-12 22:10:44,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:10:44,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 7402 transitions. [2021-06-12 22:10:44,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:44,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:44,958 INFO L472 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] [2021-06-12 22:10:45,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3833,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:45,158 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:45,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:45,158 INFO L82 PathProgramCache]: Analyzing trace with hash 16138506, now seen corresponding path program 56 times [2021-06-12 22:10:45,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:45,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488562772] [2021-06-12 22:10:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:45,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:45,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488562772] [2021-06-12 22:10:45,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488562772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:45,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357634503] [2021-06-12 22:10:45,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:45,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:10:45,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:45,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:10:45,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:45,897 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-12 22:10:45,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:45,953 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:45,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:10:45,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:46,060 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-12 22:10:46,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:46,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:46,073 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:46,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:10:46,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:46,176 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-12 22:10:46,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:46,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:46,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:46,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:10:46,191 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:46,292 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-12 22:10:46,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:46,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:46,304 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:46,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:10:46,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:46,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:46,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:46,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:46,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:10:46,413 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:46,514 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-12 22:10:46,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:46,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:46,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:46,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:10:46,527 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:46,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:46,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:46,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:46,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:10:46,634 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:46,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:46,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:46,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:46,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:10:46,735 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:46,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:46,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:10:46,828 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-06-12 22:10:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:47,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357634503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:47,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:47,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:10:47,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020230551] [2021-06-12 22:10:47,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:10:47,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:47,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:10:47,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:10:47,006 INFO L87 Difference]: Start difference. First operand 2159 states and 7402 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:10:47,310 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-12 22:10:48,062 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-12 22:10:48,519 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-12 22:10:48,824 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-12 22:10:49,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:49,016 INFO L93 Difference]: Finished difference Result 3021 states and 10110 transitions. [2021-06-12 22:10:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:10:49,017 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:49,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:49,021 INFO L225 Difference]: With dead ends: 3021 [2021-06-12 22:10:49,021 INFO L226 Difference]: Without dead ends: 3006 [2021-06-12 22:10:49,021 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2306.0ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:10:49,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2021-06-12 22:10:49,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 2153. [2021-06-12 22:10:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.427973977695167) internal successors, (7377), 2152 states have internal predecessors, (7377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:49,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7377 transitions. [2021-06-12 22:10:49,047 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7377 transitions. Word has length 26 [2021-06-12 22:10:49,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:49,047 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 7377 transitions. [2021-06-12 22:10:49,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:10:49,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7377 transitions. [2021-06-12 22:10:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:49,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:49,049 INFO L472 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] [2021-06-12 22:10:49,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3845 [2021-06-12 22:10:49,251 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:49,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:49,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 57 times [2021-06-12 22:10:49,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:49,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397685565] [2021-06-12 22:10:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:49,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:49,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397685565] [2021-06-12 22:10:49,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397685565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:49,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616215666] [2021-06-12 22:10:49,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:49,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:10:49,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:49,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:10:49,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:50,022 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_469], 3=[v_prenex_467, v_prenex_468]} [2021-06-12 22:10:50,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:50,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:50,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:10:50,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:50,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:50,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:50,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:10:50,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:50,184 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 22:10:50,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:50,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:50,197 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:50,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:10:50,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:50,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:50,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:50,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:10:50,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:50,330 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-12 22:10:50,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:50,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:50,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:50,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:50,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:10:50,346 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:50,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:50,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:50,356 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:10:50,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-06-12 22:10:50,357 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:50,469 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-12 22:10:50,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:50,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:50,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:50,482 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:10:50,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 22:10:50,484 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:50,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:50,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:50,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:50,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-12 22:10:50,496 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:50,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:50,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:10:50,599 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:365, output treesize:194 [2021-06-12 22:10:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:50,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616215666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:50,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:50,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:10:50,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059546719] [2021-06-12 22:10:50,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:10:50,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:50,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:10:50,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:10:50,776 INFO L87 Difference]: Start difference. First operand 2153 states and 7377 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:10:51,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:51,917 INFO L93 Difference]: Finished difference Result 2848 states and 9544 transitions. [2021-06-12 22:10:51,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:10:51,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:51,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:51,921 INFO L225 Difference]: With dead ends: 2848 [2021-06-12 22:10:51,921 INFO L226 Difference]: Without dead ends: 2823 [2021-06-12 22:10:51,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1443.8ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:10:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-06-12 22:10:51,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2129. [2021-06-12 22:10:51,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2128 states have (on average 3.425751879699248) internal successors, (7290), 2128 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:51,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 7290 transitions. [2021-06-12 22:10:51,947 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 7290 transitions. Word has length 26 [2021-06-12 22:10:51,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:51,947 INFO L482 AbstractCegarLoop]: Abstraction has 2129 states and 7290 transitions. [2021-06-12 22:10:51,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:10:51,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 7290 transitions. [2021-06-12 22:10:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:51,949 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:51,950 INFO L472 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] [2021-06-12 22:10:52,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3862,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:52,151 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:52,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:52,151 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-06-12 22:10:52,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:52,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162667105] [2021-06-12 22:10:52,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:52,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:52,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162667105] [2021-06-12 22:10:52,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162667105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:52,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126995676] [2021-06-12 22:10:52,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:52,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:10:52,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:52,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:10:52,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:52,866 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-12 22:10:52,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:52,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:10:52,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:52,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:52,990 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:52,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:10:52,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:53,112 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 22:10:53,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:53,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:53,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:53,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:10:53,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:53,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:53,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:53,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:10:53,137 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:53,249 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-12 22:10:53,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:53,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:53,261 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:53,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:10:53,262 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:53,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:53,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:53,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:10:53,274 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:53,375 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-12 22:10:53,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:53,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:53,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:53,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:10:53,389 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:53,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:53,397 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:10:53,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:10:53,398 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:53,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:53,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:10:53,494 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:341, output treesize:174 [2021-06-12 22:10:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:53,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126995676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:53,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:53,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:10:53,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45660307] [2021-06-12 22:10:53,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:10:53,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:53,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:10:53,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:10:53,665 INFO L87 Difference]: Start difference. First operand 2129 states and 7290 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:10:54,669 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-06-12 22:10:54,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:54,736 INFO L93 Difference]: Finished difference Result 2750 states and 9269 transitions. [2021-06-12 22:10:54,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:10:54,736 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:10:54,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:54,740 INFO L225 Difference]: With dead ends: 2750 [2021-06-12 22:10:54,740 INFO L226 Difference]: Without dead ends: 2735 [2021-06-12 22:10:54,740 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1375.3ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:10:54,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2021-06-12 22:10:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2129. [2021-06-12 22:10:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2128 states have (on average 3.425751879699248) internal successors, (7290), 2128 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 7290 transitions. [2021-06-12 22:10:54,765 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 7290 transitions. Word has length 26 [2021-06-12 22:10:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:54,765 INFO L482 AbstractCegarLoop]: Abstraction has 2129 states and 7290 transitions. [2021-06-12 22:10:54,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:10:54,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 7290 transitions. [2021-06-12 22:10:54,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:10:54,767 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:54,768 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:10:54,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3895,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:54,968 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:54,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:54,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1496131378, now seen corresponding path program 63 times [2021-06-12 22:10:54,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:54,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233172002] [2021-06-12 22:10:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:55,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:55,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233172002] [2021-06-12 22:10:55,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233172002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:55,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102849551] [2021-06-12 22:10:55,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:55,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:10:55,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:55,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:10:55,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:55,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:55,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:55,804 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:10:55,804 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 30 treesize of output 32 [2021-06-12 22:10:55,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:55,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:55,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:55,846 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:10:55,846 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 35 treesize of output 31 [2021-06-12 22:10:55,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:55,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:55,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:55,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:55,873 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 39 treesize of output 47 [2021-06-12 22:10:55,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:55,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:55,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:55,907 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 22:10:55,908 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 39 treesize of output 33 [2021-06-12 22:10:55,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:55,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:55,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:55,936 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-12 22:10:55,937 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 39 treesize of output 28 [2021-06-12 22:10:55,938 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:55,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:55,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:55,962 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:10:55,962 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 32 treesize of output 28 [2021-06-12 22:10:55,964 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:55,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:55,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:55,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:56,000 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 41 treesize of output 47 [2021-06-12 22:10:56,007 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:56,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,034 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 22:10:56,034 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 28 treesize of output 30 [2021-06-12 22:10:56,038 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:56,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,054 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:10:56,054 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 30 treesize of output 1 [2021-06-12 22:10:56,054 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:56,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:10:56,077 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 23 treesize of output 41 [2021-06-12 22:10:56,084 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:56,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,100 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:10:56,100 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 33 treesize of output 1 [2021-06-12 22:10:56,102 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:56,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,117 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:10:56,117 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 35 treesize of output 1 [2021-06-12 22:10:56,118 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:56,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,133 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:10:56,133 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 41 treesize of output 1 [2021-06-12 22:10:56,133 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:56,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,147 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:10:56,147 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 37 treesize of output 1 [2021-06-12 22:10:56,148 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:56,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,160 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:10:56,160 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 34 treesize of output 1 [2021-06-12 22:10:56,161 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:56,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:10:56,169 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:10:56,169 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 28 treesize of output 1 [2021-06-12 22:10:56,169 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:10:56,307 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2021-06-12 22:10:56,308 INFO L628 ElimStorePlain]: treesize reduction 181, result has 33.9 percent of original size [2021-06-12 22:10:56,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:10:56,310 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:83 [2021-06-12 22:10:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:56,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102849551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:56,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:56,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:10:56,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060762592] [2021-06-12 22:10:56,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:10:56,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:56,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:10:56,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:10:56,403 INFO L87 Difference]: Start difference. First operand 2129 states and 7290 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:58,574 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-12 22:10:59,029 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-12 22:10:59,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:10:59,117 INFO L93 Difference]: Finished difference Result 3313 states and 10903 transitions. [2021-06-12 22:10:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:10:59,118 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 26 [2021-06-12 22:10:59,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:10:59,122 INFO L225 Difference]: With dead ends: 3313 [2021-06-12 22:10:59,122 INFO L226 Difference]: Without dead ends: 3269 [2021-06-12 22:10:59,122 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 2691.7ms TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:10:59,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3269 states. [2021-06-12 22:10:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3269 to 2147. [2021-06-12 22:10:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.4221808014911463) internal successors, (7344), 2146 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:59,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 7344 transitions. [2021-06-12 22:10:59,152 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 7344 transitions. Word has length 26 [2021-06-12 22:10:59,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:10:59,152 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 7344 transitions. [2021-06-12 22:10:59,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:10:59,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 7344 transitions. [2021-06-12 22:10:59,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:10:59,154 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:10:59,154 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:10:59,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3928 [2021-06-12 22:10:59,355 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:10:59,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:10:59,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-06-12 22:10:59,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:10:59,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560679679] [2021-06-12 22:10:59,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:10:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:10:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:59,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:10:59,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560679679] [2021-06-12 22:10:59,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560679679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:59,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044210792] [2021-06-12 22:10:59,392 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:10:59,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:10:59,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:10:59,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:10:59,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:10:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:10:59,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044210792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:10:59,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:10:59,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:10:59,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587162961] [2021-06-12 22:10:59,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:10:59,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:10:59,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:10:59,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:10:59,507 INFO L87 Difference]: Start difference. First operand 2147 states and 7344 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:00,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:00,389 INFO L93 Difference]: Finished difference Result 5131 states and 15966 transitions. [2021-06-12 22:11:00,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:11:00,390 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 28 [2021-06-12 22:11:00,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:00,396 INFO L225 Difference]: With dead ends: 5131 [2021-06-12 22:11:00,396 INFO L226 Difference]: Without dead ends: 5131 [2021-06-12 22:11:00,396 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 484.7ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:11:00,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2021-06-12 22:11:00,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 2340. [2021-06-12 22:11:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2340 states, 2339 states have (on average 3.469431380932022) internal successors, (8115), 2339 states have internal predecessors, (8115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:00,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 8115 transitions. [2021-06-12 22:11:00,437 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 8115 transitions. Word has length 28 [2021-06-12 22:11:00,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:00,437 INFO L482 AbstractCegarLoop]: Abstraction has 2340 states and 8115 transitions. [2021-06-12 22:11:00,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:00,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 8115 transitions. [2021-06-12 22:11:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:00,439 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:00,439 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:00,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4064,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:00,640 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:00,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:00,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-06-12 22:11:00,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:00,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333419787] [2021-06-12 22:11:00,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:00,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:00,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333419787] [2021-06-12 22:11:00,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333419787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:00,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32934073] [2021-06-12 22:11:00,677 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:00,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:11:00,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:00,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:00,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:00,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32934073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:00,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:00,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:11:00,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306055111] [2021-06-12 22:11:00,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:11:00,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:00,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:11:00,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:11:00,810 INFO L87 Difference]: Start difference. First operand 2340 states and 8115 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:01,922 INFO L93 Difference]: Finished difference Result 6763 states and 20717 transitions. [2021-06-12 22:11:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:11:01,922 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:01,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:01,931 INFO L225 Difference]: With dead ends: 6763 [2021-06-12 22:11:01,931 INFO L226 Difference]: Without dead ends: 6763 [2021-06-12 22:11:01,931 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 670.9ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 22:11:01,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-06-12 22:11:01,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 2351. [2021-06-12 22:11:01,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 3.4761702127659575) internal successors, (8169), 2350 states have internal predecessors, (8169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:01,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 8169 transitions. [2021-06-12 22:11:01,980 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 8169 transitions. Word has length 28 [2021-06-12 22:11:01,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:01,980 INFO L482 AbstractCegarLoop]: Abstraction has 2351 states and 8169 transitions. [2021-06-12 22:11:01,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:01,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 8169 transitions. [2021-06-12 22:11:01,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:01,983 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:01,983 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:02,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4065 [2021-06-12 22:11:02,183 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:02,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:02,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-06-12 22:11:02,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:02,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61677537] [2021-06-12 22:11:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:02,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:02,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61677537] [2021-06-12 22:11:02,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61677537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:02,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858031516] [2021-06-12 22:11:02,220 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:02,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:02,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:02,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858031516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:02,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:02,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:11:02,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563411583] [2021-06-12 22:11:02,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:11:02,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:02,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:11:02,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:11:02,339 INFO L87 Difference]: Start difference. First operand 2351 states and 8169 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:03,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:03,445 INFO L93 Difference]: Finished difference Result 6150 states and 19231 transitions. [2021-06-12 22:11:03,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 22:11:03,446 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:03,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:03,455 INFO L225 Difference]: With dead ends: 6150 [2021-06-12 22:11:03,455 INFO L226 Difference]: Without dead ends: 6150 [2021-06-12 22:11:03,455 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 662.3ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 22:11:03,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6150 states. [2021-06-12 22:11:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6150 to 2299. [2021-06-12 22:11:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 3.4538729329852047) internal successors, (7937), 2298 states have internal predecessors, (7937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 7937 transitions. [2021-06-12 22:11:03,501 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 7937 transitions. Word has length 28 [2021-06-12 22:11:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:03,501 INFO L482 AbstractCegarLoop]: Abstraction has 2299 states and 7937 transitions. [2021-06-12 22:11:03,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 7937 transitions. [2021-06-12 22:11:03,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:03,504 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:03,504 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:03,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-06-12 22:11:03,709 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:03,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:03,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-06-12 22:11:03,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:03,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794940217] [2021-06-12 22:11:03,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:03,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:03,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794940217] [2021-06-12 22:11:03,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794940217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:03,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822262734] [2021-06-12 22:11:03,747 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:03,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:03,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:03,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:03,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:03,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822262734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:03,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:03,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:11:03,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526226599] [2021-06-12 22:11:03,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:11:03,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:03,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:11:03,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:11:03,858 INFO L87 Difference]: Start difference. First operand 2299 states and 7937 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:04,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:04,862 INFO L93 Difference]: Finished difference Result 5206 states and 16106 transitions. [2021-06-12 22:11:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:11:04,863 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:04,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:04,869 INFO L225 Difference]: With dead ends: 5206 [2021-06-12 22:11:04,870 INFO L226 Difference]: Without dead ends: 5206 [2021-06-12 22:11:04,870 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 584.7ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:11:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2021-06-12 22:11:04,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 2309. [2021-06-12 22:11:04,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 3.450173310225303) internal successors, (7963), 2308 states have internal predecessors, (7963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:04,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 7963 transitions. [2021-06-12 22:11:04,910 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 7963 transitions. Word has length 28 [2021-06-12 22:11:04,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:04,910 INFO L482 AbstractCegarLoop]: Abstraction has 2309 states and 7963 transitions. [2021-06-12 22:11:04,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:04,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 7963 transitions. [2021-06-12 22:11:04,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:04,913 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:04,913 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:05,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-06-12 22:11:05,125 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:05,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 64 times [2021-06-12 22:11:05,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:05,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774820374] [2021-06-12 22:11:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:05,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:05,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774820374] [2021-06-12 22:11:05,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774820374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:05,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726691422] [2021-06-12 22:11:05,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:05,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:11:05,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:05,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:05,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:05,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726691422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:05,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:05,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:11:05,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539060327] [2021-06-12 22:11:05,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:11:05,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:05,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:11:05,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:11:05,265 INFO L87 Difference]: Start difference. First operand 2309 states and 7963 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:05,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:05,758 INFO L93 Difference]: Finished difference Result 4633 states and 14522 transitions. [2021-06-12 22:11:05,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:11:05,758 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:05,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:05,765 INFO L225 Difference]: With dead ends: 4633 [2021-06-12 22:11:05,765 INFO L226 Difference]: Without dead ends: 4633 [2021-06-12 22:11:05,765 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:11:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-06-12 22:11:05,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 2379. [2021-06-12 22:11:05,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 3.433978132884777) internal successors, (8166), 2378 states have internal predecessors, (8166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 8166 transitions. [2021-06-12 22:11:05,815 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 8166 transitions. Word has length 28 [2021-06-12 22:11:05,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:05,815 INFO L482 AbstractCegarLoop]: Abstraction has 2379 states and 8166 transitions. [2021-06-12 22:11:05,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 8166 transitions. [2021-06-12 22:11:05,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:05,818 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:05,818 INFO L472 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] [2021-06-12 22:11:06,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4068 [2021-06-12 22:11:06,018 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:06,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-06-12 22:11:06,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:06,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920828353] [2021-06-12 22:11:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:06,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:06,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920828353] [2021-06-12 22:11:06,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920828353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:06,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859996265] [2021-06-12 22:11:06,044 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:06,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:11:06,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:06,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:06,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:06,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859996265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:06,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:06,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:11:06,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372105227] [2021-06-12 22:11:06,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:11:06,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:06,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:11:06,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:11:06,121 INFO L87 Difference]: Start difference. First operand 2379 states and 8166 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:06,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:06,276 INFO L93 Difference]: Finished difference Result 3856 states and 12614 transitions. [2021-06-12 22:11:06,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:11:06,276 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 28 [2021-06-12 22:11:06,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:06,281 INFO L225 Difference]: With dead ends: 3856 [2021-06-12 22:11:06,281 INFO L226 Difference]: Without dead ends: 3832 [2021-06-12 22:11:06,281 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:11:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3832 states. [2021-06-12 22:11:06,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3832 to 2739. [2021-06-12 22:11:06,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 3.50036523009496) internal successors, (9584), 2738 states have internal predecessors, (9584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:06,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 9584 transitions. [2021-06-12 22:11:06,318 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 9584 transitions. Word has length 28 [2021-06-12 22:11:06,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:06,319 INFO L482 AbstractCegarLoop]: Abstraction has 2739 states and 9584 transitions. [2021-06-12 22:11:06,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:06,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 9584 transitions. [2021-06-12 22:11:06,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:06,322 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:06,322 INFO L472 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] [2021-06-12 22:11:06,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:06,522 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:06,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:06,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-06-12 22:11:06,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:06,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891935922] [2021-06-12 22:11:06,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:06,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:06,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891935922] [2021-06-12 22:11:06,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891935922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:06,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445529885] [2021-06-12 22:11:06,553 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:06,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:11:06,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:06,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:11:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:06,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445529885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:06,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:06,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:11:06,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501435772] [2021-06-12 22:11:06,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:11:06,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:06,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:11:06,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:11:06,651 INFO L87 Difference]: Start difference. First operand 2739 states and 9584 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:07,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:07,187 INFO L93 Difference]: Finished difference Result 4478 states and 14368 transitions. [2021-06-12 22:11:07,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:11:07,187 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:11:07,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:07,193 INFO L225 Difference]: With dead ends: 4478 [2021-06-12 22:11:07,193 INFO L226 Difference]: Without dead ends: 4431 [2021-06-12 22:11:07,194 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 322.2ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:11:07,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4431 states. [2021-06-12 22:11:07,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4431 to 2904. [2021-06-12 22:11:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 3.5177402686875645) internal successors, (10212), 2903 states have internal predecessors, (10212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 10212 transitions. [2021-06-12 22:11:07,247 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 10212 transitions. Word has length 28 [2021-06-12 22:11:07,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:07,247 INFO L482 AbstractCegarLoop]: Abstraction has 2904 states and 10212 transitions. [2021-06-12 22:11:07,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:07,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 10212 transitions. [2021-06-12 22:11:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:07,251 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:07,251 INFO L472 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] [2021-06-12 22:11:07,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4070 [2021-06-12 22:11:07,465 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:07,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-06-12 22:11:07,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:07,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004374534] [2021-06-12 22:11:07,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:07,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:07,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004374534] [2021-06-12 22:11:07,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004374534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:07,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841912601] [2021-06-12 22:11:07,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:07,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:11:07,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:07,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:11:07,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:07,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841912601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:07,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:07,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:11:07,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841690824] [2021-06-12 22:11:07,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:11:07,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:07,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:11:07,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:11:07,616 INFO L87 Difference]: Start difference. First operand 2904 states and 10212 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:08,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:08,226 INFO L93 Difference]: Finished difference Result 4785 states and 15055 transitions. [2021-06-12 22:11:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:11:08,226 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:08,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:08,232 INFO L225 Difference]: With dead ends: 4785 [2021-06-12 22:11:08,232 INFO L226 Difference]: Without dead ends: 4759 [2021-06-12 22:11:08,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:11:08,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4759 states. [2021-06-12 22:11:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4759 to 2922. [2021-06-12 22:11:08,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.5217391304347827) internal successors, (10287), 2921 states have internal predecessors, (10287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:08,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 10287 transitions. [2021-06-12 22:11:08,277 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 10287 transitions. Word has length 28 [2021-06-12 22:11:08,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:08,277 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 10287 transitions. [2021-06-12 22:11:08,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:08,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 10287 transitions. [2021-06-12 22:11:08,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:08,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:08,281 INFO L472 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] [2021-06-12 22:11:08,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4071 [2021-06-12 22:11:08,501 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:08,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:08,501 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-06-12 22:11:08,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:08,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934927187] [2021-06-12 22:11:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:08,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:08,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934927187] [2021-06-12 22:11:08,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934927187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:08,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787191392] [2021-06-12 22:11:08,529 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:08,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:11:08,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:08,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:11:08,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:08,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787191392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:08,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:08,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:11:08,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392670371] [2021-06-12 22:11:08,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:11:08,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:08,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:11:08,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:11:08,632 INFO L87 Difference]: Start difference. First operand 2922 states and 10287 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:09,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:09,267 INFO L93 Difference]: Finished difference Result 4783 states and 15074 transitions. [2021-06-12 22:11:09,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:11:09,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:09,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:09,273 INFO L225 Difference]: With dead ends: 4783 [2021-06-12 22:11:09,273 INFO L226 Difference]: Without dead ends: 4771 [2021-06-12 22:11:09,273 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 397.8ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:11:09,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4771 states. [2021-06-12 22:11:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4771 to 2922. [2021-06-12 22:11:09,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.515576857240671) internal successors, (10269), 2921 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 10269 transitions. [2021-06-12 22:11:09,319 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 10269 transitions. Word has length 28 [2021-06-12 22:11:09,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:09,319 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 10269 transitions. [2021-06-12 22:11:09,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:09,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 10269 transitions. [2021-06-12 22:11:09,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:09,322 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:09,322 INFO L472 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] [2021-06-12 22:11:09,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4072,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:09,523 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:09,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-06-12 22:11:09,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:09,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531280816] [2021-06-12 22:11:09,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:09,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:09,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531280816] [2021-06-12 22:11:09,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531280816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:09,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808425991] [2021-06-12 22:11:09,553 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:09,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:11:09,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:09,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808425991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:09,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:09,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:11:09,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953588628] [2021-06-12 22:11:09,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:09,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:09,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:09,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:09,638 INFO L87 Difference]: Start difference. First operand 2922 states and 10269 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:10,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:10,123 INFO L93 Difference]: Finished difference Result 5554 states and 17878 transitions. [2021-06-12 22:11:10,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:11:10,124 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:11:10,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:10,131 INFO L225 Difference]: With dead ends: 5554 [2021-06-12 22:11:10,132 INFO L226 Difference]: Without dead ends: 5507 [2021-06-12 22:11:10,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 290.3ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:11:10,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-06-12 22:11:10,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 3068. [2021-06-12 22:11:10,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 3067 states have (on average 3.5598304532116076) internal successors, (10918), 3067 states have internal predecessors, (10918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:10,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 10918 transitions. [2021-06-12 22:11:10,186 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 10918 transitions. Word has length 28 [2021-06-12 22:11:10,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:10,186 INFO L482 AbstractCegarLoop]: Abstraction has 3068 states and 10918 transitions. [2021-06-12 22:11:10,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:10,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 10918 transitions. [2021-06-12 22:11:10,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:10,190 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:10,190 INFO L472 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] [2021-06-12 22:11:10,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4073 [2021-06-12 22:11:10,401 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:10,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:10,401 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 68 times [2021-06-12 22:11:10,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:10,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816620467] [2021-06-12 22:11:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:10,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:10,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816620467] [2021-06-12 22:11:10,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816620467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:10,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170071009] [2021-06-12 22:11:10,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:10,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:10,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:10,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:10,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:10,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170071009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:10,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:10,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:11:10,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236171868] [2021-06-12 22:11:10,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:11:10,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:10,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:11:10,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:11:10,498 INFO L87 Difference]: Start difference. First operand 3068 states and 10918 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:10,643 INFO L93 Difference]: Finished difference Result 4356 states and 14401 transitions. [2021-06-12 22:11:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:11:10,643 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:10,648 INFO L225 Difference]: With dead ends: 4356 [2021-06-12 22:11:10,648 INFO L226 Difference]: Without dead ends: 4356 [2021-06-12 22:11:10,649 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:11:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2021-06-12 22:11:10,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 2879. [2021-06-12 22:11:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 3.5295343988881167) internal successors, (10158), 2878 states have internal predecessors, (10158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:10,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 10158 transitions. [2021-06-12 22:11:10,689 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 10158 transitions. Word has length 28 [2021-06-12 22:11:10,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:10,689 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 10158 transitions. [2021-06-12 22:11:10,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:10,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 10158 transitions. [2021-06-12 22:11:10,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:10,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:10,693 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:10,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4074 [2021-06-12 22:11:10,893 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:10,893 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 69 times [2021-06-12 22:11:10,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:10,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822123624] [2021-06-12 22:11:10,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:10,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:10,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822123624] [2021-06-12 22:11:10,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822123624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:10,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240346438] [2021-06-12 22:11:10,925 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:10,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:11:10,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:10,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:10,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:11,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240346438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:11,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:11,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:11:11,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863725544] [2021-06-12 22:11:11,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:11,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:11,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:11,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:11,017 INFO L87 Difference]: Start difference. First operand 2879 states and 10158 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:11,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:11,633 INFO L93 Difference]: Finished difference Result 6267 states and 19847 transitions. [2021-06-12 22:11:11,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:11:11,633 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-12 22:11:11,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:11,641 INFO L225 Difference]: With dead ends: 6267 [2021-06-12 22:11:11,641 INFO L226 Difference]: Without dead ends: 6267 [2021-06-12 22:11:11,641 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:11:11,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6267 states. [2021-06-12 22:11:11,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6267 to 2897. [2021-06-12 22:11:11,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2897 states, 2896 states have (on average 3.5293508287292816) internal successors, (10221), 2896 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 10221 transitions. [2021-06-12 22:11:11,694 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 10221 transitions. Word has length 28 [2021-06-12 22:11:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:11,694 INFO L482 AbstractCegarLoop]: Abstraction has 2897 states and 10221 transitions. [2021-06-12 22:11:11,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:11,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 10221 transitions. [2021-06-12 22:11:11,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:11,698 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:11,698 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:11,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4075 [2021-06-12 22:11:11,898 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:11,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:11,898 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 70 times [2021-06-12 22:11:11,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:11,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562560104] [2021-06-12 22:11:11,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:11,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:11,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562560104] [2021-06-12 22:11:11,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562560104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:11,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37640802] [2021-06-12 22:11:11,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:11,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:11:11,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:11,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:11,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:12,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37640802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:12,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:12,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:11:12,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197573848] [2021-06-12 22:11:12,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:12,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:12,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:12,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:12,020 INFO L87 Difference]: Start difference. First operand 2897 states and 10221 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:12,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:12,727 INFO L93 Difference]: Finished difference Result 6510 states and 20600 transitions. [2021-06-12 22:11:12,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:11:12,727 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-12 22:11:12,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:12,735 INFO L225 Difference]: With dead ends: 6510 [2021-06-12 22:11:12,735 INFO L226 Difference]: Without dead ends: 6510 [2021-06-12 22:11:12,735 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 22:11:12,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6510 states. [2021-06-12 22:11:12,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6510 to 2991. [2021-06-12 22:11:12,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.5210702341137123) internal successors, (10528), 2990 states have internal predecessors, (10528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:12,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 10528 transitions. [2021-06-12 22:11:12,790 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 10528 transitions. Word has length 28 [2021-06-12 22:11:12,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:12,790 INFO L482 AbstractCegarLoop]: Abstraction has 2991 states and 10528 transitions. [2021-06-12 22:11:12,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:12,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 10528 transitions. [2021-06-12 22:11:12,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:12,794 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:12,794 INFO L472 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] [2021-06-12 22:11:12,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4076,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:12,994 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:12,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:12,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 71 times [2021-06-12 22:11:12,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:12,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987557997] [2021-06-12 22:11:12,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:13,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:13,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987557997] [2021-06-12 22:11:13,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987557997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:13,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659747032] [2021-06-12 22:11:13,023 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:13,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:11:13,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:13,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:11:13,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:13,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659747032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:13,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:13,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:11:13,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176882977] [2021-06-12 22:11:13,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:13,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:13,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:13,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:13,108 INFO L87 Difference]: Start difference. First operand 2991 states and 10528 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:13,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:13,648 INFO L93 Difference]: Finished difference Result 6652 states and 21097 transitions. [2021-06-12 22:11:13,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:11:13,648 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:11:13,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:13,658 INFO L225 Difference]: With dead ends: 6652 [2021-06-12 22:11:13,658 INFO L226 Difference]: Without dead ends: 6616 [2021-06-12 22:11:13,658 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 312.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:11:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6616 states. [2021-06-12 22:11:13,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6616 to 3393. [2021-06-12 22:11:13,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 3392 states have (on average 3.5474646226415096) internal successors, (12033), 3392 states have internal predecessors, (12033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:13,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 12033 transitions. [2021-06-12 22:11:13,724 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 12033 transitions. Word has length 28 [2021-06-12 22:11:13,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:13,724 INFO L482 AbstractCegarLoop]: Abstraction has 3393 states and 12033 transitions. [2021-06-12 22:11:13,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:13,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 12033 transitions. [2021-06-12 22:11:13,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:13,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:13,728 INFO L472 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] [2021-06-12 22:11:13,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4077 [2021-06-12 22:11:13,929 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:13,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:13,929 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 72 times [2021-06-12 22:11:13,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:13,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042306521] [2021-06-12 22:11:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:13,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:13,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042306521] [2021-06-12 22:11:13,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042306521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:13,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717035677] [2021-06-12 22:11:13,958 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:13,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:11:13,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:13,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:11:13,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:14,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717035677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:14,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:14,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:11:14,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859927165] [2021-06-12 22:11:14,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:14,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:14,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:14,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:14,061 INFO L87 Difference]: Start difference. First operand 3393 states and 12033 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:14,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:14,579 INFO L93 Difference]: Finished difference Result 6827 states and 21583 transitions. [2021-06-12 22:11:14,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:11:14,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:11:14,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:14,589 INFO L225 Difference]: With dead ends: 6827 [2021-06-12 22:11:14,589 INFO L226 Difference]: Without dead ends: 6827 [2021-06-12 22:11:14,589 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 318.0ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:11:14,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6827 states. [2021-06-12 22:11:14,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6827 to 3104. [2021-06-12 22:11:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3103 states have (on average 3.5078955849178213) internal successors, (10885), 3103 states have internal predecessors, (10885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:14,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 10885 transitions. [2021-06-12 22:11:14,653 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 10885 transitions. Word has length 28 [2021-06-12 22:11:14,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:14,653 INFO L482 AbstractCegarLoop]: Abstraction has 3104 states and 10885 transitions. [2021-06-12 22:11:14,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:14,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 10885 transitions. [2021-06-12 22:11:14,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:14,656 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:14,656 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:14,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-06-12 22:11:14,857 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:14,857 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 73 times [2021-06-12 22:11:14,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:14,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986066967] [2021-06-12 22:11:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:14,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:14,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986066967] [2021-06-12 22:11:14,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986066967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:14,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141242965] [2021-06-12 22:11:14,888 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:14,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:14,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:14,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141242965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:14,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:14,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:11:14,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194536404] [2021-06-12 22:11:14,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:14,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:14,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:14,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:14,978 INFO L87 Difference]: Start difference. First operand 3104 states and 10885 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:15,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:15,597 INFO L93 Difference]: Finished difference Result 5999 states and 19332 transitions. [2021-06-12 22:11:15,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 22:11:15,597 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-12 22:11:15,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:15,605 INFO L225 Difference]: With dead ends: 5999 [2021-06-12 22:11:15,606 INFO L226 Difference]: Without dead ends: 5995 [2021-06-12 22:11:15,606 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 346.4ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 22:11:15,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5995 states. [2021-06-12 22:11:15,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5995 to 2864. [2021-06-12 22:11:15,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2863 states have (on average 3.5337059028990567) internal successors, (10117), 2863 states have internal predecessors, (10117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 10117 transitions. [2021-06-12 22:11:15,658 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 10117 transitions. Word has length 28 [2021-06-12 22:11:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:15,658 INFO L482 AbstractCegarLoop]: Abstraction has 2864 states and 10117 transitions. [2021-06-12 22:11:15,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 10117 transitions. [2021-06-12 22:11:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:15,661 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:15,661 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:15,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4079 [2021-06-12 22:11:15,862 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:15,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:15,862 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 74 times [2021-06-12 22:11:15,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:15,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529730922] [2021-06-12 22:11:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:15,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:15,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529730922] [2021-06-12 22:11:15,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529730922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:15,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73401413] [2021-06-12 22:11:15,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:15,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:15,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:15,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:15,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:16,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73401413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:16,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:16,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:11:16,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753425342] [2021-06-12 22:11:16,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:11:16,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:16,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:11:16,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:11:16,004 INFO L87 Difference]: Start difference. First operand 2864 states and 10117 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:16,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:16,926 INFO L93 Difference]: Finished difference Result 9242 states and 30126 transitions. [2021-06-12 22:11:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:11:16,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:16,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:16,940 INFO L225 Difference]: With dead ends: 9242 [2021-06-12 22:11:16,940 INFO L226 Difference]: Without dead ends: 9242 [2021-06-12 22:11:16,941 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 536.8ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:11:16,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2021-06-12 22:11:17,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 3043. [2021-06-12 22:11:17,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 3.6058514135437214) internal successors, (10969), 3042 states have internal predecessors, (10969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 10969 transitions. [2021-06-12 22:11:17,016 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 10969 transitions. Word has length 28 [2021-06-12 22:11:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:17,016 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 10969 transitions. [2021-06-12 22:11:17,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 10969 transitions. [2021-06-12 22:11:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:17,020 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:17,020 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:17,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4080,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:17,220 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:17,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:17,220 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 75 times [2021-06-12 22:11:17,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:17,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290472624] [2021-06-12 22:11:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:17,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:17,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290472624] [2021-06-12 22:11:17,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290472624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:17,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014766372] [2021-06-12 22:11:17,260 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:17,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:11:17,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:17,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:17,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:17,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014766372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:17,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:17,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:11:17,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89148984] [2021-06-12 22:11:17,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:11:17,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:17,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:11:17,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:11:17,368 INFO L87 Difference]: Start difference. First operand 3043 states and 10969 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:18,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:18,280 INFO L93 Difference]: Finished difference Result 9069 states and 29656 transitions. [2021-06-12 22:11:18,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:11:18,280 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:18,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:18,294 INFO L225 Difference]: With dead ends: 9069 [2021-06-12 22:11:18,294 INFO L226 Difference]: Without dead ends: 9069 [2021-06-12 22:11:18,294 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:11:18,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9069 states. [2021-06-12 22:11:18,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9069 to 3012. [2021-06-12 22:11:18,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3012 states, 3011 states have (on average 3.5888409166389903) internal successors, (10806), 3011 states have internal predecessors, (10806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:18,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 10806 transitions. [2021-06-12 22:11:18,378 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 10806 transitions. Word has length 28 [2021-06-12 22:11:18,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:18,378 INFO L482 AbstractCegarLoop]: Abstraction has 3012 states and 10806 transitions. [2021-06-12 22:11:18,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 10806 transitions. [2021-06-12 22:11:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:18,383 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:18,383 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:18,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:18,583 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:18,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:18,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 76 times [2021-06-12 22:11:18,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:18,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47404027] [2021-06-12 22:11:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:18,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:18,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47404027] [2021-06-12 22:11:18,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47404027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:18,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172582671] [2021-06-12 22:11:18,614 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:18,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:11:18,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:18,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:18,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:18,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172582671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:18,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:18,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:11:18,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398631524] [2021-06-12 22:11:18,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:11:18,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:18,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:11:18,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:11:18,713 INFO L87 Difference]: Start difference. First operand 3012 states and 10806 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:19,542 INFO L93 Difference]: Finished difference Result 8513 states and 26929 transitions. [2021-06-12 22:11:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 22:11:19,542 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-12 22:11:19,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:19,555 INFO L225 Difference]: With dead ends: 8513 [2021-06-12 22:11:19,555 INFO L226 Difference]: Without dead ends: 8513 [2021-06-12 22:11:19,555 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 459.9ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:11:19,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8513 states. [2021-06-12 22:11:19,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8513 to 3032. [2021-06-12 22:11:19,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 3031 states have (on average 3.5922137908281093) internal successors, (10888), 3031 states have internal predecessors, (10888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:19,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 10888 transitions. [2021-06-12 22:11:19,635 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 10888 transitions. Word has length 28 [2021-06-12 22:11:19,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:19,635 INFO L482 AbstractCegarLoop]: Abstraction has 3032 states and 10888 transitions. [2021-06-12 22:11:19,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:19,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 10888 transitions. [2021-06-12 22:11:19,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:19,639 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:19,639 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:19,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4082,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:19,840 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:19,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 77 times [2021-06-12 22:11:19,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:19,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300374818] [2021-06-12 22:11:19,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:19,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:19,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300374818] [2021-06-12 22:11:19,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300374818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:19,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536803435] [2021-06-12 22:11:19,871 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:19,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:11:19,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:19,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:19,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:19,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536803435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:19,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:19,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:11:19,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239419704] [2021-06-12 22:11:19,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:11:19,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:19,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:11:19,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:11:19,977 INFO L87 Difference]: Start difference. First operand 3032 states and 10888 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:20,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:20,780 INFO L93 Difference]: Finished difference Result 8020 states and 25736 transitions. [2021-06-12 22:11:20,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:11:20,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-12 22:11:20,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:20,793 INFO L225 Difference]: With dead ends: 8020 [2021-06-12 22:11:20,793 INFO L226 Difference]: Without dead ends: 8012 [2021-06-12 22:11:20,793 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 431.9ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:11:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2021-06-12 22:11:20,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 3014. [2021-06-12 22:11:20,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3013 states have (on average 3.5881181546631264) internal successors, (10811), 3013 states have internal predecessors, (10811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 10811 transitions. [2021-06-12 22:11:20,869 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 10811 transitions. Word has length 28 [2021-06-12 22:11:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:20,869 INFO L482 AbstractCegarLoop]: Abstraction has 3014 states and 10811 transitions. [2021-06-12 22:11:20,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 10811 transitions. [2021-06-12 22:11:20,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:20,873 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:20,873 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:21,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4083 [2021-06-12 22:11:21,073 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:21,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:21,074 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 78 times [2021-06-12 22:11:21,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:21,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317767701] [2021-06-12 22:11:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:21,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:21,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317767701] [2021-06-12 22:11:21,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317767701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:21,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864637335] [2021-06-12 22:11:21,107 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:21,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:11:21,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:21,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:21,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:21,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864637335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:21,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:21,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:11:21,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343083931] [2021-06-12 22:11:21,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:11:21,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:21,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:11:21,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:11:21,215 INFO L87 Difference]: Start difference. First operand 3014 states and 10811 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:22,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:22,051 INFO L93 Difference]: Finished difference Result 7945 states and 25505 transitions. [2021-06-12 22:11:22,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 22:11:22,052 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:22,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:22,063 INFO L225 Difference]: With dead ends: 7945 [2021-06-12 22:11:22,063 INFO L226 Difference]: Without dead ends: 7945 [2021-06-12 22:11:22,063 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 485.7ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:11:22,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-06-12 22:11:22,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 3030. [2021-06-12 22:11:22,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3029 states have (on average 3.5902938263453286) internal successors, (10875), 3029 states have internal predecessors, (10875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 10875 transitions. [2021-06-12 22:11:22,131 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 10875 transitions. Word has length 28 [2021-06-12 22:11:22,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:22,132 INFO L482 AbstractCegarLoop]: Abstraction has 3030 states and 10875 transitions. [2021-06-12 22:11:22,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:22,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 10875 transitions. [2021-06-12 22:11:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:22,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:22,135 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:22,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4084 [2021-06-12 22:11:22,336 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:22,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 79 times [2021-06-12 22:11:22,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:22,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229839316] [2021-06-12 22:11:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:22,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:22,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:22,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229839316] [2021-06-12 22:11:22,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229839316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:22,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210501248] [2021-06-12 22:11:22,375 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:22,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:22,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:22,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210501248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:22,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:22,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:11:22,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014243] [2021-06-12 22:11:22,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:11:22,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:22,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:11:22,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:11:22,477 INFO L87 Difference]: Start difference. First operand 3030 states and 10875 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:23,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:23,308 INFO L93 Difference]: Finished difference Result 7613 states and 24721 transitions. [2021-06-12 22:11:23,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:11:23,309 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:23,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:23,319 INFO L225 Difference]: With dead ends: 7613 [2021-06-12 22:11:23,320 INFO L226 Difference]: Without dead ends: 7605 [2021-06-12 22:11:23,320 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 453.7ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:11:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7605 states. [2021-06-12 22:11:23,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7605 to 2787. [2021-06-12 22:11:23,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 3.5078966259870783) internal successors, (9773), 2786 states have internal predecessors, (9773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 9773 transitions. [2021-06-12 22:11:23,382 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 9773 transitions. Word has length 28 [2021-06-12 22:11:23,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:23,382 INFO L482 AbstractCegarLoop]: Abstraction has 2787 states and 9773 transitions. [2021-06-12 22:11:23,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:23,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 9773 transitions. [2021-06-12 22:11:23,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:23,385 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:23,385 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:23,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4085,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:23,589 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:23,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:23,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 80 times [2021-06-12 22:11:23,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:23,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035042610] [2021-06-12 22:11:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:23,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:23,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035042610] [2021-06-12 22:11:23,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035042610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:23,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056828855] [2021-06-12 22:11:23,620 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:23,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:23,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:23,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:23,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:23,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056828855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:23,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:23,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:11:23,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731485490] [2021-06-12 22:11:23,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:11:23,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:23,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:11:23,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:11:23,727 INFO L87 Difference]: Start difference. First operand 2787 states and 9773 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:24,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:24,504 INFO L93 Difference]: Finished difference Result 5810 states and 18592 transitions. [2021-06-12 22:11:24,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:11:24,505 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-12 22:11:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:24,512 INFO L225 Difference]: With dead ends: 5810 [2021-06-12 22:11:24,512 INFO L226 Difference]: Without dead ends: 5810 [2021-06-12 22:11:24,513 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 468.5ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:11:24,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5810 states. [2021-06-12 22:11:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5810 to 2799. [2021-06-12 22:11:24,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2799 states, 2798 states have (on average 3.506433166547534) internal successors, (9811), 2798 states have internal predecessors, (9811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2799 states to 2799 states and 9811 transitions. [2021-06-12 22:11:24,562 INFO L78 Accepts]: Start accepts. Automaton has 2799 states and 9811 transitions. Word has length 28 [2021-06-12 22:11:24,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:24,562 INFO L482 AbstractCegarLoop]: Abstraction has 2799 states and 9811 transitions. [2021-06-12 22:11:24,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:24,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2799 states and 9811 transitions. [2021-06-12 22:11:24,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:24,565 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:24,565 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:24,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4086 [2021-06-12 22:11:24,766 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:24,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:24,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 81 times [2021-06-12 22:11:24,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:24,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867411971] [2021-06-12 22:11:24,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:24,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:24,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867411971] [2021-06-12 22:11:24,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867411971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:24,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58252465] [2021-06-12 22:11:24,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:24,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:11:24,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:24,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:24,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:24,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58252465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:24,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:24,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:11:24,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43248098] [2021-06-12 22:11:24,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:11:24,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:24,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:11:24,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:11:24,919 INFO L87 Difference]: Start difference. First operand 2799 states and 9811 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:25,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:25,888 INFO L93 Difference]: Finished difference Result 6586 states and 20579 transitions. [2021-06-12 22:11:25,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:11:25,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:25,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:25,897 INFO L225 Difference]: With dead ends: 6586 [2021-06-12 22:11:25,897 INFO L226 Difference]: Without dead ends: 6586 [2021-06-12 22:11:25,897 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 618.6ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 22:11:25,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6586 states. [2021-06-12 22:11:25,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6586 to 2865. [2021-06-12 22:11:25,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 3.5013966480446927) internal successors, (10028), 2864 states have internal predecessors, (10028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:25,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 10028 transitions. [2021-06-12 22:11:25,956 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 10028 transitions. Word has length 28 [2021-06-12 22:11:25,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:25,956 INFO L482 AbstractCegarLoop]: Abstraction has 2865 states and 10028 transitions. [2021-06-12 22:11:25,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:25,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 10028 transitions. [2021-06-12 22:11:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:25,959 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:25,959 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:26,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4087 [2021-06-12 22:11:26,160 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:26,160 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 82 times [2021-06-12 22:11:26,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:26,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253800977] [2021-06-12 22:11:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:26,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:26,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253800977] [2021-06-12 22:11:26,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253800977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:26,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960739203] [2021-06-12 22:11:26,192 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:26,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:11:26,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:26,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:26,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:26,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960739203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:26,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:26,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:11:26,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999028349] [2021-06-12 22:11:26,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:11:26,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:26,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:11:26,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:11:26,303 INFO L87 Difference]: Start difference. First operand 2865 states and 10028 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:27,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:27,207 INFO L93 Difference]: Finished difference Result 6152 states and 19441 transitions. [2021-06-12 22:11:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:11:27,207 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:27,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:27,215 INFO L225 Difference]: With dead ends: 6152 [2021-06-12 22:11:27,215 INFO L226 Difference]: Without dead ends: 6148 [2021-06-12 22:11:27,216 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 539.1ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:11:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6148 states. [2021-06-12 22:11:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6148 to 2791. [2021-06-12 22:11:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.4974910394265235) internal successors, (9758), 2790 states have internal predecessors, (9758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:27,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 9758 transitions. [2021-06-12 22:11:27,270 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 9758 transitions. Word has length 28 [2021-06-12 22:11:27,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:27,270 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 9758 transitions. [2021-06-12 22:11:27,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:27,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 9758 transitions. [2021-06-12 22:11:27,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:27,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:27,273 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:27,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4088 [2021-06-12 22:11:27,474 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:27,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:27,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 65 times [2021-06-12 22:11:27,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:27,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009591904] [2021-06-12 22:11:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:27,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:27,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009591904] [2021-06-12 22:11:27,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009591904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:27,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206774573] [2021-06-12 22:11:27,514 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:27,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:11:27,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:27,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:27,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:27,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206774573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:27,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:27,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:11:27,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112266019] [2021-06-12 22:11:27,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:11:27,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:27,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:11:27,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:11:27,605 INFO L87 Difference]: Start difference. First operand 2791 states and 9758 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:28,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:28,096 INFO L93 Difference]: Finished difference Result 5291 states and 17008 transitions. [2021-06-12 22:11:28,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:11:28,096 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:28,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:28,103 INFO L225 Difference]: With dead ends: 5291 [2021-06-12 22:11:28,103 INFO L226 Difference]: Without dead ends: 5291 [2021-06-12 22:11:28,104 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 289.0ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:11:28,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2021-06-12 22:11:28,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 2791. [2021-06-12 22:11:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.499641577060932) internal successors, (9764), 2790 states have internal predecessors, (9764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:28,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 9764 transitions. [2021-06-12 22:11:28,168 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 9764 transitions. Word has length 28 [2021-06-12 22:11:28,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:28,168 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 9764 transitions. [2021-06-12 22:11:28,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:28,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 9764 transitions. [2021-06-12 22:11:28,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:28,171 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:28,171 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:28,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-06-12 22:11:28,371 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:28,372 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 66 times [2021-06-12 22:11:28,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:28,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240346014] [2021-06-12 22:11:28,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:28,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:28,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240346014] [2021-06-12 22:11:28,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240346014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:28,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962008897] [2021-06-12 22:11:28,408 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:28,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:11:28,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:28,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:28,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:28,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962008897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:28,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:28,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:11:28,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919825618] [2021-06-12 22:11:28,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:11:28,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:28,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:11:28,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:11:28,503 INFO L87 Difference]: Start difference. First operand 2791 states and 9764 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:29,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:29,167 INFO L93 Difference]: Finished difference Result 5642 states and 18000 transitions. [2021-06-12 22:11:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:11:29,168 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:29,175 INFO L225 Difference]: With dead ends: 5642 [2021-06-12 22:11:29,175 INFO L226 Difference]: Without dead ends: 5642 [2021-06-12 22:11:29,175 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 391.5ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 22:11:29,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5642 states. [2021-06-12 22:11:29,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5642 to 2782. [2021-06-12 22:11:29,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2782 states, 2781 states have (on average 3.4998202085580727) internal successors, (9733), 2781 states have internal predecessors, (9733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:29,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2782 states to 2782 states and 9733 transitions. [2021-06-12 22:11:29,224 INFO L78 Accepts]: Start accepts. Automaton has 2782 states and 9733 transitions. Word has length 28 [2021-06-12 22:11:29,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:29,224 INFO L482 AbstractCegarLoop]: Abstraction has 2782 states and 9733 transitions. [2021-06-12 22:11:29,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:29,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2782 states and 9733 transitions. [2021-06-12 22:11:29,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:29,227 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:29,227 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:29,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4090,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:29,428 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:29,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:29,428 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 67 times [2021-06-12 22:11:29,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:29,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464669248] [2021-06-12 22:11:29,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:29,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:29,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464669248] [2021-06-12 22:11:29,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464669248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:29,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636131819] [2021-06-12 22:11:29,464 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:29,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:29,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:29,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636131819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:29,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:29,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:11:29,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765642051] [2021-06-12 22:11:29,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:11:29,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:29,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:11:29,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:11:29,558 INFO L87 Difference]: Start difference. First operand 2782 states and 9733 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:30,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:30,360 INFO L93 Difference]: Finished difference Result 6106 states and 19261 transitions. [2021-06-12 22:11:30,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 22:11:30,360 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:30,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:30,369 INFO L225 Difference]: With dead ends: 6106 [2021-06-12 22:11:30,369 INFO L226 Difference]: Without dead ends: 6106 [2021-06-12 22:11:30,369 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 456.1ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:11:30,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2021-06-12 22:11:30,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 2844. [2021-06-12 22:11:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2844 states, 2843 states have (on average 3.4956032360182907) internal successors, (9938), 2843 states have internal predecessors, (9938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:30,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 9938 transitions. [2021-06-12 22:11:30,424 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 9938 transitions. Word has length 28 [2021-06-12 22:11:30,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:30,424 INFO L482 AbstractCegarLoop]: Abstraction has 2844 states and 9938 transitions. [2021-06-12 22:11:30,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:30,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 9938 transitions. [2021-06-12 22:11:30,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:30,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:30,427 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:30,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4091 [2021-06-12 22:11:30,628 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:30,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:30,628 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 68 times [2021-06-12 22:11:30,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:30,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979517928] [2021-06-12 22:11:30,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:30,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:30,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979517928] [2021-06-12 22:11:30,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979517928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:30,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124447309] [2021-06-12 22:11:30,658 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:30,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:30,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:30,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:30,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:30,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124447309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:30,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:30,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 22:11:30,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821438032] [2021-06-12 22:11:30,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:11:30,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:30,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:11:30,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:11:30,763 INFO L87 Difference]: Start difference. First operand 2844 states and 9938 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:31,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:31,237 INFO L93 Difference]: Finished difference Result 6899 states and 23235 transitions. [2021-06-12 22:11:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:11:31,237 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:31,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:31,247 INFO L225 Difference]: With dead ends: 6899 [2021-06-12 22:11:31,247 INFO L226 Difference]: Without dead ends: 6899 [2021-06-12 22:11:31,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 333.4ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:11:31,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-06-12 22:11:31,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 4080. [2021-06-12 22:11:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4080 states, 4079 states have (on average 3.613875949987742) internal successors, (14741), 4079 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:31,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4080 states to 4080 states and 14741 transitions. [2021-06-12 22:11:31,321 INFO L78 Accepts]: Start accepts. Automaton has 4080 states and 14741 transitions. Word has length 28 [2021-06-12 22:11:31,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:31,321 INFO L482 AbstractCegarLoop]: Abstraction has 4080 states and 14741 transitions. [2021-06-12 22:11:31,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:31,321 INFO L276 IsEmpty]: Start isEmpty. Operand 4080 states and 14741 transitions. [2021-06-12 22:11:31,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:31,326 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:31,326 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:31,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4092,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:31,526 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:31,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:31,527 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 69 times [2021-06-12 22:11:31,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:31,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150363422] [2021-06-12 22:11:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:31,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:31,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150363422] [2021-06-12 22:11:31,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150363422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:31,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179604051] [2021-06-12 22:11:31,562 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:31,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:11:31,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:31,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:31,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:31,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179604051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:31,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:31,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:11:31,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751480779] [2021-06-12 22:11:31,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:11:31,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:31,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:11:31,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:11:31,649 INFO L87 Difference]: Start difference. First operand 4080 states and 14741 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:32,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:32,356 INFO L93 Difference]: Finished difference Result 7418 states and 25100 transitions. [2021-06-12 22:11:32,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:11:32,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:32,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:32,367 INFO L225 Difference]: With dead ends: 7418 [2021-06-12 22:11:32,367 INFO L226 Difference]: Without dead ends: 7414 [2021-06-12 22:11:32,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 414.9ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:11:32,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7414 states. [2021-06-12 22:11:32,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7414 to 3968. [2021-06-12 22:11:32,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 3.623140912528359) internal successors, (14373), 3967 states have internal predecessors, (14373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 14373 transitions. [2021-06-12 22:11:32,440 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 14373 transitions. Word has length 28 [2021-06-12 22:11:32,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:32,440 INFO L482 AbstractCegarLoop]: Abstraction has 3968 states and 14373 transitions. [2021-06-12 22:11:32,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 14373 transitions. [2021-06-12 22:11:32,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:32,445 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:32,445 INFO L472 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] [2021-06-12 22:11:32,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4093 [2021-06-12 22:11:32,645 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:32,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:32,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 83 times [2021-06-12 22:11:32,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:32,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919627303] [2021-06-12 22:11:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:32,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:32,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919627303] [2021-06-12 22:11:32,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919627303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:32,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887105653] [2021-06-12 22:11:32,671 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:32,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:11:32,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:32,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:11:32,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:32,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887105653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:32,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:32,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:11:32,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781482279] [2021-06-12 22:11:32,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:11:32,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:32,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:11:32,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:11:32,769 INFO L87 Difference]: Start difference. First operand 3968 states and 14373 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:33,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:33,518 INFO L93 Difference]: Finished difference Result 8219 states and 27545 transitions. [2021-06-12 22:11:33,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:11:33,519 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:11:33,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:33,531 INFO L225 Difference]: With dead ends: 8219 [2021-06-12 22:11:33,531 INFO L226 Difference]: Without dead ends: 8207 [2021-06-12 22:11:33,532 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:11:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8207 states. [2021-06-12 22:11:33,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8207 to 4409. [2021-06-12 22:11:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 3.713475499092559) internal successors, (16369), 4408 states have internal predecessors, (16369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 16369 transitions. [2021-06-12 22:11:33,622 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 16369 transitions. Word has length 28 [2021-06-12 22:11:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:33,622 INFO L482 AbstractCegarLoop]: Abstraction has 4409 states and 16369 transitions. [2021-06-12 22:11:33,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:33,622 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 16369 transitions. [2021-06-12 22:11:33,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:33,628 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:33,628 INFO L472 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] [2021-06-12 22:11:33,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4094,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:33,829 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:33,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:33,829 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 84 times [2021-06-12 22:11:33,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:33,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701356686] [2021-06-12 22:11:33,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:33,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:33,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701356686] [2021-06-12 22:11:33,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701356686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:33,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690266036] [2021-06-12 22:11:33,854 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:33,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:11:33,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:33,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:11:33,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:33,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690266036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:33,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:33,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:11:33,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843072068] [2021-06-12 22:11:33,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:11:33,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:33,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:11:33,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:11:33,952 INFO L87 Difference]: Start difference. First operand 4409 states and 16369 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:34,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:34,715 INFO L93 Difference]: Finished difference Result 8511 states and 28462 transitions. [2021-06-12 22:11:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:11:34,715 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:11:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:34,727 INFO L225 Difference]: With dead ends: 8511 [2021-06-12 22:11:34,727 INFO L226 Difference]: Without dead ends: 8511 [2021-06-12 22:11:34,727 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:11:34,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8511 states. [2021-06-12 22:11:34,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8511 to 4429. [2021-06-12 22:11:34,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4429 states, 4428 states have (on average 3.7007678410117433) internal successors, (16387), 4428 states have internal predecessors, (16387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4429 states to 4429 states and 16387 transitions. [2021-06-12 22:11:34,809 INFO L78 Accepts]: Start accepts. Automaton has 4429 states and 16387 transitions. Word has length 28 [2021-06-12 22:11:34,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:34,809 INFO L482 AbstractCegarLoop]: Abstraction has 4429 states and 16387 transitions. [2021-06-12 22:11:34,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:34,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4429 states and 16387 transitions. [2021-06-12 22:11:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:34,815 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:34,815 INFO L472 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] [2021-06-12 22:11:35,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4095,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:35,016 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:35,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 85 times [2021-06-12 22:11:35,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:35,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41441476] [2021-06-12 22:11:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:35,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:35,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41441476] [2021-06-12 22:11:35,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41441476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:35,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826844411] [2021-06-12 22:11:35,045 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:35,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:11:35,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:35,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826844411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:35,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:35,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:11:35,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901488519] [2021-06-12 22:11:35,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:11:35,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:35,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:11:35,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:11:35,122 INFO L87 Difference]: Start difference. First operand 4429 states and 16387 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:35,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:35,521 INFO L93 Difference]: Finished difference Result 7882 states and 27809 transitions. [2021-06-12 22:11:35,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:11:35,521 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-12 22:11:35,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:35,534 INFO L225 Difference]: With dead ends: 7882 [2021-06-12 22:11:35,534 INFO L226 Difference]: Without dead ends: 7799 [2021-06-12 22:11:35,534 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:11:35,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7799 states. [2021-06-12 22:11:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7799 to 5872. [2021-06-12 22:11:35,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5872 states, 5871 states have (on average 3.7629024016351558) internal successors, (22092), 5871 states have internal predecessors, (22092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5872 states to 5872 states and 22092 transitions. [2021-06-12 22:11:35,663 INFO L78 Accepts]: Start accepts. Automaton has 5872 states and 22092 transitions. Word has length 28 [2021-06-12 22:11:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:35,664 INFO L482 AbstractCegarLoop]: Abstraction has 5872 states and 22092 transitions. [2021-06-12 22:11:35,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:35,664 INFO L276 IsEmpty]: Start isEmpty. Operand 5872 states and 22092 transitions. [2021-06-12 22:11:35,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:35,671 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:35,671 INFO L472 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] [2021-06-12 22:11:35,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4096 [2021-06-12 22:11:35,872 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:35,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:35,872 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 86 times [2021-06-12 22:11:35,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:35,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801334723] [2021-06-12 22:11:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:35,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:35,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801334723] [2021-06-12 22:11:35,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801334723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:35,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76172701] [2021-06-12 22:11:35,896 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:35,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:35,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:35,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:35,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:35,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76172701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:35,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:35,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-12 22:11:35,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717326042] [2021-06-12 22:11:35,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:11:35,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:35,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:11:35,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:11:35,983 INFO L87 Difference]: Start difference. First operand 5872 states and 22092 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:36,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:36,145 INFO L93 Difference]: Finished difference Result 8160 states and 28714 transitions. [2021-06-12 22:11:36,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:11:36,145 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:36,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:36,157 INFO L225 Difference]: With dead ends: 8160 [2021-06-12 22:11:36,158 INFO L226 Difference]: Without dead ends: 8160 [2021-06-12 22:11:36,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:11:36,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8160 states. [2021-06-12 22:11:36,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8160 to 6012. [2021-06-12 22:11:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 6011 states have (on average 3.7394776243553487) internal successors, (22478), 6011 states have internal predecessors, (22478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 22478 transitions. [2021-06-12 22:11:36,254 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 22478 transitions. Word has length 28 [2021-06-12 22:11:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:36,254 INFO L482 AbstractCegarLoop]: Abstraction has 6012 states and 22478 transitions. [2021-06-12 22:11:36,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 22478 transitions. [2021-06-12 22:11:36,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:36,262 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:36,262 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:36,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4097,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:36,463 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:36,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:36,463 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 87 times [2021-06-12 22:11:36,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:36,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887155174] [2021-06-12 22:11:36,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:36,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:36,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887155174] [2021-06-12 22:11:36,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887155174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:36,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658701799] [2021-06-12 22:11:36,499 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:36,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:11:36,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:36,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:36,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:36,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658701799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:36,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:36,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:11:36,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157482604] [2021-06-12 22:11:36,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:36,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:36,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:36,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:36,584 INFO L87 Difference]: Start difference. First operand 6012 states and 22478 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:37,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:37,234 INFO L93 Difference]: Finished difference Result 12545 states and 43647 transitions. [2021-06-12 22:11:37,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 22:11:37,234 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-06-12 22:11:37,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:37,256 INFO L225 Difference]: With dead ends: 12545 [2021-06-12 22:11:37,257 INFO L226 Difference]: Without dead ends: 12545 [2021-06-12 22:11:37,257 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 393.1ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:11:37,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12545 states. [2021-06-12 22:11:37,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12545 to 6665. [2021-06-12 22:11:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6664 states have (on average 3.7554021608643455) internal successors, (25026), 6664 states have internal predecessors, (25026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:37,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 25026 transitions. [2021-06-12 22:11:37,404 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 25026 transitions. Word has length 28 [2021-06-12 22:11:37,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:37,404 INFO L482 AbstractCegarLoop]: Abstraction has 6665 states and 25026 transitions. [2021-06-12 22:11:37,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:37,404 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 25026 transitions. [2021-06-12 22:11:37,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:37,414 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:37,414 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:37,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4098 [2021-06-12 22:11:37,615 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:37,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:37,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 88 times [2021-06-12 22:11:37,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:37,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728854144] [2021-06-12 22:11:37,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:37,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:37,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728854144] [2021-06-12 22:11:37,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728854144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:37,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561066335] [2021-06-12 22:11:37,646 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:37,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:11:37,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:37,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:37,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:37,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561066335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:37,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:37,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 22:11:37,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456216557] [2021-06-12 22:11:37,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:11:37,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:37,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:11:37,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:11:37,728 INFO L87 Difference]: Start difference. First operand 6665 states and 25026 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) [2021-06-12 22:11:38,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:38,374 INFO L93 Difference]: Finished difference Result 12678 states and 44148 transitions. [2021-06-12 22:11:38,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:11:38,374 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 28 [2021-06-12 22:11:38,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:38,397 INFO L225 Difference]: With dead ends: 12678 [2021-06-12 22:11:38,397 INFO L226 Difference]: Without dead ends: 12678 [2021-06-12 22:11:38,398 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:11:38,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12678 states. [2021-06-12 22:11:38,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12678 to 6895. [2021-06-12 22:11:38,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6895 states, 6894 states have (on average 3.7358572671888597) internal successors, (25755), 6894 states have internal predecessors, (25755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:38,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6895 states to 6895 states and 25755 transitions. [2021-06-12 22:11:38,547 INFO L78 Accepts]: Start accepts. Automaton has 6895 states and 25755 transitions. Word has length 28 [2021-06-12 22:11:38,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:38,547 INFO L482 AbstractCegarLoop]: Abstraction has 6895 states and 25755 transitions. [2021-06-12 22:11:38,547 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) [2021-06-12 22:11:38,548 INFO L276 IsEmpty]: Start isEmpty. Operand 6895 states and 25755 transitions. [2021-06-12 22:11:38,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:38,558 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:38,558 INFO L472 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] [2021-06-12 22:11:38,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4099 [2021-06-12 22:11:38,758 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:38,759 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 89 times [2021-06-12 22:11:38,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:38,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150426652] [2021-06-12 22:11:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:38,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:38,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150426652] [2021-06-12 22:11:38,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150426652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:38,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980335451] [2021-06-12 22:11:38,784 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:38,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:11:38,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:38,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:11:38,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:38,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980335451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:38,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:38,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:11:38,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065862247] [2021-06-12 22:11:38,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:11:38,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:38,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:11:38,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:11:38,862 INFO L87 Difference]: Start difference. First operand 6895 states and 25755 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:39,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:39,205 INFO L93 Difference]: Finished difference Result 9371 states and 33680 transitions. [2021-06-12 22:11:39,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:11:39,206 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-06-12 22:11:39,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:39,221 INFO L225 Difference]: With dead ends: 9371 [2021-06-12 22:11:39,222 INFO L226 Difference]: Without dead ends: 9341 [2021-06-12 22:11:39,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:11:39,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-06-12 22:11:39,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 7751. [2021-06-12 22:11:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7751 states, 7750 states have (on average 3.7625806451612904) internal successors, (29160), 7750 states have internal predecessors, (29160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:39,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7751 states to 7751 states and 29160 transitions. [2021-06-12 22:11:39,369 INFO L78 Accepts]: Start accepts. Automaton has 7751 states and 29160 transitions. Word has length 28 [2021-06-12 22:11:39,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:39,369 INFO L482 AbstractCegarLoop]: Abstraction has 7751 states and 29160 transitions. [2021-06-12 22:11:39,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:39,369 INFO L276 IsEmpty]: Start isEmpty. Operand 7751 states and 29160 transitions. [2021-06-12 22:11:39,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:39,379 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:39,379 INFO L472 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] [2021-06-12 22:11:39,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4100 [2021-06-12 22:11:39,580 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:39,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:39,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 90 times [2021-06-12 22:11:39,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:39,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641333445] [2021-06-12 22:11:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:39,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:39,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641333445] [2021-06-12 22:11:39,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641333445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:39,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579116866] [2021-06-12 22:11:39,608 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:39,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:11:39,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:39,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:11:39,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:39,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579116866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:39,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:39,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:11:39,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318503882] [2021-06-12 22:11:39,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:11:39,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:39,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:11:39,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:11:39,689 INFO L87 Difference]: Start difference. First operand 7751 states and 29160 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:40,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:40,003 INFO L93 Difference]: Finished difference Result 9993 states and 35743 transitions. [2021-06-12 22:11:40,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:11:40,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-06-12 22:11:40,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:40,020 INFO L225 Difference]: With dead ends: 9993 [2021-06-12 22:11:40,020 INFO L226 Difference]: Without dead ends: 9993 [2021-06-12 22:11:40,020 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:11:40,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9993 states. [2021-06-12 22:11:40,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9993 to 7791. [2021-06-12 22:11:40,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7791 states, 7790 states have (on average 3.7585365853658534) internal successors, (29279), 7790 states have internal predecessors, (29279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7791 states to 7791 states and 29279 transitions. [2021-06-12 22:11:40,157 INFO L78 Accepts]: Start accepts. Automaton has 7791 states and 29279 transitions. Word has length 28 [2021-06-12 22:11:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:40,157 INFO L482 AbstractCegarLoop]: Abstraction has 7791 states and 29279 transitions. [2021-06-12 22:11:40,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 7791 states and 29279 transitions. [2021-06-12 22:11:40,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:40,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:40,168 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:40,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4101 [2021-06-12 22:11:40,368 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:40,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:40,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 91 times [2021-06-12 22:11:40,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:40,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048794265] [2021-06-12 22:11:40,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:40,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:40,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048794265] [2021-06-12 22:11:40,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048794265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:40,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770526885] [2021-06-12 22:11:40,442 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:40,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:40,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:40,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770526885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:40,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:40,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 22:11:40,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29770428] [2021-06-12 22:11:40,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:11:40,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:40,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:11:40,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:11:40,517 INFO L87 Difference]: Start difference. First operand 7791 states and 29279 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) [2021-06-12 22:11:41,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:41,065 INFO L93 Difference]: Finished difference Result 13376 states and 47489 transitions. [2021-06-12 22:11:41,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:11:41,065 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 28 [2021-06-12 22:11:41,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:41,090 INFO L225 Difference]: With dead ends: 13376 [2021-06-12 22:11:41,090 INFO L226 Difference]: Without dead ends: 13372 [2021-06-12 22:11:41,091 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 287.4ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:11:41,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13372 states. [2021-06-12 22:11:41,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13372 to 7707. [2021-06-12 22:11:41,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 7706 states have (on average 3.7608357124318714) internal successors, (28981), 7706 states have internal predecessors, (28981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:41,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 28981 transitions. [2021-06-12 22:11:41,258 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 28981 transitions. Word has length 28 [2021-06-12 22:11:41,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:41,258 INFO L482 AbstractCegarLoop]: Abstraction has 7707 states and 28981 transitions. [2021-06-12 22:11:41,258 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) [2021-06-12 22:11:41,258 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 28981 transitions. [2021-06-12 22:11:41,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:41,269 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:41,269 INFO L472 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] [2021-06-12 22:11:41,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4102,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:41,469 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:41,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:41,469 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 92 times [2021-06-12 22:11:41,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:41,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415157693] [2021-06-12 22:11:41,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:41,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:41,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415157693] [2021-06-12 22:11:41,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415157693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:41,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544871443] [2021-06-12 22:11:41,499 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:41,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:41,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:41,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:11:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:41,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544871443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:41,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:41,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:11:41,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913527957] [2021-06-12 22:11:41,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:11:41,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:41,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:11:41,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:11:41,618 INFO L87 Difference]: Start difference. First operand 7707 states and 28981 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:41,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:41,987 INFO L93 Difference]: Finished difference Result 10234 states and 36622 transitions. [2021-06-12 22:11:41,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:11:41,988 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-12 22:11:41,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:42,005 INFO L225 Difference]: With dead ends: 10234 [2021-06-12 22:11:42,005 INFO L226 Difference]: Without dead ends: 10234 [2021-06-12 22:11:42,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 247.1ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:11:42,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10234 states. [2021-06-12 22:11:42,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10234 to 7653. [2021-06-12 22:11:42,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7653 states, 7652 states have (on average 3.753659174072138) internal successors, (28723), 7652 states have internal predecessors, (28723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:42,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7653 states to 7653 states and 28723 transitions. [2021-06-12 22:11:42,141 INFO L78 Accepts]: Start accepts. Automaton has 7653 states and 28723 transitions. Word has length 28 [2021-06-12 22:11:42,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:42,141 INFO L482 AbstractCegarLoop]: Abstraction has 7653 states and 28723 transitions. [2021-06-12 22:11:42,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 7653 states and 28723 transitions. [2021-06-12 22:11:42,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:42,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:42,152 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:42,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4103,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:42,352 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:42,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:42,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 93 times [2021-06-12 22:11:42,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:42,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230109321] [2021-06-12 22:11:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:42,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:42,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230109321] [2021-06-12 22:11:42,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230109321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:42,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429444903] [2021-06-12 22:11:42,400 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:42,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:11:42,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:42,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:42,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:42,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429444903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:42,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:42,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:11:42,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378548767] [2021-06-12 22:11:42,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:42,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:42,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:42,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:42,483 INFO L87 Difference]: Start difference. First operand 7653 states and 28723 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:43,125 INFO L93 Difference]: Finished difference Result 13259 states and 46986 transitions. [2021-06-12 22:11:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:11:43,126 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-06-12 22:11:43,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:43,152 INFO L225 Difference]: With dead ends: 13259 [2021-06-12 22:11:43,152 INFO L226 Difference]: Without dead ends: 13247 [2021-06-12 22:11:43,152 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 357.1ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:11:43,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13247 states. [2021-06-12 22:11:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13247 to 7653. [2021-06-12 22:11:43,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7653 states, 7652 states have (on average 3.7526136957658127) internal successors, (28715), 7652 states have internal predecessors, (28715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:43,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7653 states to 7653 states and 28715 transitions. [2021-06-12 22:11:43,337 INFO L78 Accepts]: Start accepts. Automaton has 7653 states and 28715 transitions. Word has length 28 [2021-06-12 22:11:43,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:43,337 INFO L482 AbstractCegarLoop]: Abstraction has 7653 states and 28715 transitions. [2021-06-12 22:11:43,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:43,337 INFO L276 IsEmpty]: Start isEmpty. Operand 7653 states and 28715 transitions. [2021-06-12 22:11:43,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:43,347 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:43,347 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:43,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4104,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:43,548 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:43,548 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 94 times [2021-06-12 22:11:43,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:43,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588810469] [2021-06-12 22:11:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:43,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:43,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588810469] [2021-06-12 22:11:43,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588810469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:43,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441516155] [2021-06-12 22:11:43,584 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:43,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:11:43,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:43,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:43,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:43,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:43,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441516155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:43,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:43,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:11:43,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397929756] [2021-06-12 22:11:43,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:11:43,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:43,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:11:43,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:11:43,693 INFO L87 Difference]: Start difference. First operand 7653 states and 28715 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:44,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:44,737 INFO L93 Difference]: Finished difference Result 20233 states and 70540 transitions. [2021-06-12 22:11:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 22:11:44,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:11:44,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:44,774 INFO L225 Difference]: With dead ends: 20233 [2021-06-12 22:11:44,774 INFO L226 Difference]: Without dead ends: 20233 [2021-06-12 22:11:44,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 648.9ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 22:11:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20233 states. [2021-06-12 22:11:45,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20233 to 10480. [2021-06-12 22:11:45,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10480 states, 10479 states have (on average 3.7973089035213285) internal successors, (39792), 10479 states have internal predecessors, (39792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:45,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10480 states to 10480 states and 39792 transitions. [2021-06-12 22:11:45,053 INFO L78 Accepts]: Start accepts. Automaton has 10480 states and 39792 transitions. Word has length 28 [2021-06-12 22:11:45,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:45,053 INFO L482 AbstractCegarLoop]: Abstraction has 10480 states and 39792 transitions. [2021-06-12 22:11:45,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:45,054 INFO L276 IsEmpty]: Start isEmpty. Operand 10480 states and 39792 transitions. [2021-06-12 22:11:45,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:45,068 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:45,068 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:45,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4105 [2021-06-12 22:11:45,269 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:45,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:45,269 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 95 times [2021-06-12 22:11:45,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:45,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207589273] [2021-06-12 22:11:45,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:45,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:45,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207589273] [2021-06-12 22:11:45,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207589273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:45,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984618969] [2021-06-12 22:11:45,305 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:45,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:11:45,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:45,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:45,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:45,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984618969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:45,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:45,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:11:45,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352665529] [2021-06-12 22:11:45,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:11:45,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:45,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:11:45,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:11:45,389 INFO L87 Difference]: Start difference. First operand 10480 states and 39792 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:46,338 INFO L93 Difference]: Finished difference Result 19460 states and 68525 transitions. [2021-06-12 22:11:46,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:11:46,339 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:11:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:46,374 INFO L225 Difference]: With dead ends: 19460 [2021-06-12 22:11:46,375 INFO L226 Difference]: Without dead ends: 19448 [2021-06-12 22:11:46,375 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 571.3ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:11:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19448 states. [2021-06-12 22:11:46,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19448 to 10294. [2021-06-12 22:11:46,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10294 states, 10293 states have (on average 3.8036529680365296) internal successors, (39151), 10293 states have internal predecessors, (39151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10294 states to 10294 states and 39151 transitions. [2021-06-12 22:11:46,642 INFO L78 Accepts]: Start accepts. Automaton has 10294 states and 39151 transitions. Word has length 28 [2021-06-12 22:11:46,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:46,642 INFO L482 AbstractCegarLoop]: Abstraction has 10294 states and 39151 transitions. [2021-06-12 22:11:46,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:46,642 INFO L276 IsEmpty]: Start isEmpty. Operand 10294 states and 39151 transitions. [2021-06-12 22:11:46,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:46,656 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:46,656 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:46,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4106,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:46,857 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:46,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:46,857 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 96 times [2021-06-12 22:11:46,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:46,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448049337] [2021-06-12 22:11:46,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:46,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:46,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448049337] [2021-06-12 22:11:46,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448049337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:46,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067106232] [2021-06-12 22:11:46,893 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:46,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:11:46,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:46,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:46,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:46,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067106232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:46,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:46,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:11:46,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151987904] [2021-06-12 22:11:46,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:11:46,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:46,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:11:46,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:11:46,978 INFO L87 Difference]: Start difference. First operand 10294 states and 39151 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:47,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:47,879 INFO L93 Difference]: Finished difference Result 19263 states and 67830 transitions. [2021-06-12 22:11:47,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:11:47,879 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:11:47,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:47,915 INFO L225 Difference]: With dead ends: 19263 [2021-06-12 22:11:47,915 INFO L226 Difference]: Without dead ends: 19227 [2021-06-12 22:11:47,915 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 534.4ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 22:11:47,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19227 states. [2021-06-12 22:11:48,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19227 to 10338. [2021-06-12 22:11:48,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10338 states, 10337 states have (on average 3.8017800135435813) internal successors, (39299), 10337 states have internal predecessors, (39299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10338 states to 10338 states and 39299 transitions. [2021-06-12 22:11:48,176 INFO L78 Accepts]: Start accepts. Automaton has 10338 states and 39299 transitions. Word has length 28 [2021-06-12 22:11:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:48,176 INFO L482 AbstractCegarLoop]: Abstraction has 10338 states and 39299 transitions. [2021-06-12 22:11:48,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:48,176 INFO L276 IsEmpty]: Start isEmpty. Operand 10338 states and 39299 transitions. [2021-06-12 22:11:48,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:48,191 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:48,191 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:48,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4107,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:48,392 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:48,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:48,392 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 97 times [2021-06-12 22:11:48,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:48,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948171580] [2021-06-12 22:11:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:48,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:48,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948171580] [2021-06-12 22:11:48,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948171580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:48,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633355270] [2021-06-12 22:11:48,439 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:48,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:48,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:48,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633355270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:48,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:48,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:11:48,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647823783] [2021-06-12 22:11:48,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:11:48,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:48,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:11:48,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:11:48,578 INFO L87 Difference]: Start difference. First operand 10338 states and 39299 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:49,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:49,857 INFO L93 Difference]: Finished difference Result 19164 states and 67607 transitions. [2021-06-12 22:11:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 22:11:49,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:49,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:49,893 INFO L225 Difference]: With dead ends: 19164 [2021-06-12 22:11:49,893 INFO L226 Difference]: Without dead ends: 19164 [2021-06-12 22:11:49,894 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 828.6ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:11:49,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19164 states. [2021-06-12 22:11:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19164 to 10534. [2021-06-12 22:11:50,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10534 states, 10533 states have (on average 3.79274660590525) internal successors, (39949), 10533 states have internal predecessors, (39949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:50,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10534 states to 10534 states and 39949 transitions. [2021-06-12 22:11:50,148 INFO L78 Accepts]: Start accepts. Automaton has 10534 states and 39949 transitions. Word has length 28 [2021-06-12 22:11:50,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:50,148 INFO L482 AbstractCegarLoop]: Abstraction has 10534 states and 39949 transitions. [2021-06-12 22:11:50,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:50,148 INFO L276 IsEmpty]: Start isEmpty. Operand 10534 states and 39949 transitions. [2021-06-12 22:11:50,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:50,162 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:50,162 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:50,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4108 [2021-06-12 22:11:50,363 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:50,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:50,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 98 times [2021-06-12 22:11:50,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:50,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625389760] [2021-06-12 22:11:50,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:50,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:50,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625389760] [2021-06-12 22:11:50,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625389760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:50,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046030870] [2021-06-12 22:11:50,449 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:50,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:50,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:50,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:50,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:50,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046030870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:50,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:50,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:11:50,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202403275] [2021-06-12 22:11:50,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:11:50,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:50,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:11:50,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:11:50,551 INFO L87 Difference]: Start difference. First operand 10534 states and 39949 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:51,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:51,702 INFO L93 Difference]: Finished difference Result 18787 states and 66570 transitions. [2021-06-12 22:11:51,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:11:51,702 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:51,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:51,737 INFO L225 Difference]: With dead ends: 18787 [2021-06-12 22:11:51,737 INFO L226 Difference]: Without dead ends: 18775 [2021-06-12 22:11:51,738 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 728.8ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:11:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18775 states. [2021-06-12 22:11:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18775 to 10416. [2021-06-12 22:11:51,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10416 states, 10415 states have (on average 3.797215554488718) internal successors, (39548), 10415 states have internal predecessors, (39548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10416 states to 10416 states and 39548 transitions. [2021-06-12 22:11:52,061 INFO L78 Accepts]: Start accepts. Automaton has 10416 states and 39548 transitions. Word has length 28 [2021-06-12 22:11:52,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:52,061 INFO L482 AbstractCegarLoop]: Abstraction has 10416 states and 39548 transitions. [2021-06-12 22:11:52,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:52,061 INFO L276 IsEmpty]: Start isEmpty. Operand 10416 states and 39548 transitions. [2021-06-12 22:11:52,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:52,075 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:52,075 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:52,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4109,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:52,276 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:52,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:52,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 99 times [2021-06-12 22:11:52,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:52,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441125239] [2021-06-12 22:11:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:52,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:52,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441125239] [2021-06-12 22:11:52,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441125239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:52,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376119501] [2021-06-12 22:11:52,367 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:52,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:11:52,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:52,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:52,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:52,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376119501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:52,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:52,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 22:11:52,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125241937] [2021-06-12 22:11:52,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:11:52,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:52,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:11:52,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:11:52,472 INFO L87 Difference]: Start difference. First operand 10416 states and 39548 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:53,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:53,428 INFO L93 Difference]: Finished difference Result 18027 states and 64486 transitions. [2021-06-12 22:11:53,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:11:53,429 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-12 22:11:53,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:53,460 INFO L225 Difference]: With dead ends: 18027 [2021-06-12 22:11:53,460 INFO L226 Difference]: Without dead ends: 17991 [2021-06-12 22:11:53,461 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 543.8ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:11:53,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17991 states. [2021-06-12 22:11:53,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17991 to 10440. [2021-06-12 22:11:53,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10440 states, 10439 states have (on average 3.796149056423029) internal successors, (39628), 10439 states have internal predecessors, (39628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10440 states to 10440 states and 39628 transitions. [2021-06-12 22:11:53,700 INFO L78 Accepts]: Start accepts. Automaton has 10440 states and 39628 transitions. Word has length 28 [2021-06-12 22:11:53,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:53,700 INFO L482 AbstractCegarLoop]: Abstraction has 10440 states and 39628 transitions. [2021-06-12 22:11:53,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:53,701 INFO L276 IsEmpty]: Start isEmpty. Operand 10440 states and 39628 transitions. [2021-06-12 22:11:53,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:53,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:53,715 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:53,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4110 [2021-06-12 22:11:53,916 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:53,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:53,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 100 times [2021-06-12 22:11:53,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:53,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278012028] [2021-06-12 22:11:53,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:53,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:53,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278012028] [2021-06-12 22:11:53,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278012028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:53,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264758422] [2021-06-12 22:11:53,947 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:53,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:11:53,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:53,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:53,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:54,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264758422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:54,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:54,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:11:54,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15877478] [2021-06-12 22:11:54,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:11:54,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:54,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:11:54,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:11:54,066 INFO L87 Difference]: Start difference. First operand 10440 states and 39628 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:55,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:55,379 INFO L93 Difference]: Finished difference Result 26119 states and 92958 transitions. [2021-06-12 22:11:55,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 22:11:55,380 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:55,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:55,434 INFO L225 Difference]: With dead ends: 26119 [2021-06-12 22:11:55,434 INFO L226 Difference]: Without dead ends: 26119 [2021-06-12 22:11:55,434 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 782.4ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 22:11:55,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26119 states. [2021-06-12 22:11:55,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26119 to 10727. [2021-06-12 22:11:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10727 states, 10726 states have (on average 3.821928025358941) internal successors, (40994), 10726 states have internal predecessors, (40994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10727 states to 10727 states and 40994 transitions. [2021-06-12 22:11:55,749 INFO L78 Accepts]: Start accepts. Automaton has 10727 states and 40994 transitions. Word has length 28 [2021-06-12 22:11:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:55,749 INFO L482 AbstractCegarLoop]: Abstraction has 10727 states and 40994 transitions. [2021-06-12 22:11:55,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:55,749 INFO L276 IsEmpty]: Start isEmpty. Operand 10727 states and 40994 transitions. [2021-06-12 22:11:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:55,765 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:55,765 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:55,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4111 [2021-06-12 22:11:55,965 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:55,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:55,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 101 times [2021-06-12 22:11:55,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:55,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096521807] [2021-06-12 22:11:55,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:55,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:55,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096521807] [2021-06-12 22:11:55,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096521807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:55,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040065196] [2021-06-12 22:11:55,997 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:56,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:11:56,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:56,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:56,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:56,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040065196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:56,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:56,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:11:56,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267650026] [2021-06-12 22:11:56,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:11:56,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:56,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:11:56,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:11:56,117 INFO L87 Difference]: Start difference. First operand 10727 states and 40994 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:57,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:57,343 INFO L93 Difference]: Finished difference Result 25550 states and 91560 transitions. [2021-06-12 22:11:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 22:11:57,343 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:57,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:57,398 INFO L225 Difference]: With dead ends: 25550 [2021-06-12 22:11:57,398 INFO L226 Difference]: Without dead ends: 25550 [2021-06-12 22:11:57,399 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 746.7ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:11:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25550 states. [2021-06-12 22:11:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25550 to 10629. [2021-06-12 22:11:57,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10629 states, 10628 states have (on average 3.8091832894241624) internal successors, (40484), 10628 states have internal predecessors, (40484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:57,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10629 states to 10629 states and 40484 transitions. [2021-06-12 22:11:57,707 INFO L78 Accepts]: Start accepts. Automaton has 10629 states and 40484 transitions. Word has length 28 [2021-06-12 22:11:57,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:57,707 INFO L482 AbstractCegarLoop]: Abstraction has 10629 states and 40484 transitions. [2021-06-12 22:11:57,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:57,707 INFO L276 IsEmpty]: Start isEmpty. Operand 10629 states and 40484 transitions. [2021-06-12 22:11:57,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:57,722 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:57,722 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:57,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-06-12 22:11:57,922 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:57,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:57,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 102 times [2021-06-12 22:11:57,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:57,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808132328] [2021-06-12 22:11:57,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:57,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:57,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808132328] [2021-06-12 22:11:57,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808132328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:57,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763476616] [2021-06-12 22:11:57,954 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:57,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:11:57,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:57,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:57,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:58,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763476616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:58,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:58,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:11:58,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161362507] [2021-06-12 22:11:58,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:11:58,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:58,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:11:58,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:11:58,065 INFO L87 Difference]: Start difference. First operand 10629 states and 40484 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:58,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:58,883 INFO L93 Difference]: Finished difference Result 20289 states and 72951 transitions. [2021-06-12 22:11:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:11:58,883 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:11:58,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:58,921 INFO L225 Difference]: With dead ends: 20289 [2021-06-12 22:11:58,921 INFO L226 Difference]: Without dead ends: 20289 [2021-06-12 22:11:58,921 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 458.3ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:11:58,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20289 states. [2021-06-12 22:11:59,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20289 to 10638. [2021-06-12 22:11:59,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10638 states, 10637 states have (on average 3.8081225909560965) internal successors, (40507), 10637 states have internal predecessors, (40507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10638 states to 10638 states and 40507 transitions. [2021-06-12 22:11:59,164 INFO L78 Accepts]: Start accepts. Automaton has 10638 states and 40507 transitions. Word has length 28 [2021-06-12 22:11:59,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:59,164 INFO L482 AbstractCegarLoop]: Abstraction has 10638 states and 40507 transitions. [2021-06-12 22:11:59,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:59,164 INFO L276 IsEmpty]: Start isEmpty. Operand 10638 states and 40507 transitions. [2021-06-12 22:11:59,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:11:59,179 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:59,179 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:59,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4113,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:59,379 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:59,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:59,380 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 103 times [2021-06-12 22:11:59,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:59,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873812325] [2021-06-12 22:11:59,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:59,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:59,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873812325] [2021-06-12 22:11:59,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873812325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:59,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057975735] [2021-06-12 22:11:59,418 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:59,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:11:59,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:59,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057975735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:59,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:59,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:11:59,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748486636] [2021-06-12 22:11:59,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:11:59,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:59,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:11:59,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:11:59,535 INFO L87 Difference]: Start difference. First operand 10638 states and 40507 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:00,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:00,210 INFO L93 Difference]: Finished difference Result 18838 states and 68311 transitions. [2021-06-12 22:12:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:12:00,211 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-12 22:12:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:00,247 INFO L225 Difference]: With dead ends: 18838 [2021-06-12 22:12:00,247 INFO L226 Difference]: Without dead ends: 18838 [2021-06-12 22:12:00,248 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 376.5ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:12:00,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18838 states. [2021-06-12 22:12:00,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18838 to 10650. [2021-06-12 22:12:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10650 states, 10649 states have (on average 3.807399755845619) internal successors, (40545), 10649 states have internal predecessors, (40545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:00,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10650 states to 10650 states and 40545 transitions. [2021-06-12 22:12:00,541 INFO L78 Accepts]: Start accepts. Automaton has 10650 states and 40545 transitions. Word has length 28 [2021-06-12 22:12:00,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:00,541 INFO L482 AbstractCegarLoop]: Abstraction has 10650 states and 40545 transitions. [2021-06-12 22:12:00,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:00,541 INFO L276 IsEmpty]: Start isEmpty. Operand 10650 states and 40545 transitions. [2021-06-12 22:12:00,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:00,556 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:00,556 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:00,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4114,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:00,757 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:00,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 104 times [2021-06-12 22:12:00,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:00,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095332168] [2021-06-12 22:12:00,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:00,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:00,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095332168] [2021-06-12 22:12:00,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095332168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:00,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837172517] [2021-06-12 22:12:00,788 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:00,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:00,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:00,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:00,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:00,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837172517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:00,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:00,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:12:00,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406557243] [2021-06-12 22:12:00,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:12:00,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:00,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:12:00,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:12:00,903 INFO L87 Difference]: Start difference. First operand 10650 states and 40545 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:01,918 INFO L93 Difference]: Finished difference Result 19442 states and 70046 transitions. [2021-06-12 22:12:01,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 22:12:01,918 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:12:01,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:01,955 INFO L225 Difference]: With dead ends: 19442 [2021-06-12 22:12:01,955 INFO L226 Difference]: Without dead ends: 19442 [2021-06-12 22:12:01,956 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 627.3ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 22:12:01,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19442 states. [2021-06-12 22:12:02,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19442 to 10758. [2021-06-12 22:12:02,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10758 states, 10757 states have (on average 3.8002231105326763) internal successors, (40879), 10757 states have internal predecessors, (40879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10758 states to 10758 states and 40879 transitions. [2021-06-12 22:12:02,215 INFO L78 Accepts]: Start accepts. Automaton has 10758 states and 40879 transitions. Word has length 28 [2021-06-12 22:12:02,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:02,215 INFO L482 AbstractCegarLoop]: Abstraction has 10758 states and 40879 transitions. [2021-06-12 22:12:02,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 10758 states and 40879 transitions. [2021-06-12 22:12:02,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:02,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:02,230 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:02,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4115,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:02,431 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:02,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:02,431 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 105 times [2021-06-12 22:12:02,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:02,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035736254] [2021-06-12 22:12:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:02,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:02,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035736254] [2021-06-12 22:12:02,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035736254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:02,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839755263] [2021-06-12 22:12:02,468 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:02,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:12:02,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:02,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:02,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:02,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839755263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:02,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:02,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:12:02,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807152109] [2021-06-12 22:12:02,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:12:02,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:02,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:12:02,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:12:02,652 INFO L87 Difference]: Start difference. First operand 10758 states and 40879 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:03,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:03,580 INFO L93 Difference]: Finished difference Result 19017 states and 68890 transitions. [2021-06-12 22:12:03,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:12:03,581 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:12:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:03,616 INFO L225 Difference]: With dead ends: 19017 [2021-06-12 22:12:03,616 INFO L226 Difference]: Without dead ends: 19013 [2021-06-12 22:12:03,616 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 576.1ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:12:03,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19013 states. [2021-06-12 22:12:03,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19013 to 10684. [2021-06-12 22:12:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10684 states, 10683 states have (on average 3.804174857249836) internal successors, (40640), 10683 states have internal predecessors, (40640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10684 states to 10684 states and 40640 transitions. [2021-06-12 22:12:03,865 INFO L78 Accepts]: Start accepts. Automaton has 10684 states and 40640 transitions. Word has length 28 [2021-06-12 22:12:03,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:03,865 INFO L482 AbstractCegarLoop]: Abstraction has 10684 states and 40640 transitions. [2021-06-12 22:12:03,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:03,865 INFO L276 IsEmpty]: Start isEmpty. Operand 10684 states and 40640 transitions. [2021-06-12 22:12:03,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:03,881 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:03,881 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:04,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4116,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:04,081 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:04,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:04,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 106 times [2021-06-12 22:12:04,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:04,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763058471] [2021-06-12 22:12:04,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:04,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:04,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763058471] [2021-06-12 22:12:04,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763058471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:04,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340101443] [2021-06-12 22:12:04,118 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:04,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:12:04,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:04,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:04,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:04,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340101443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:04,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:04,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:12:04,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178826445] [2021-06-12 22:12:04,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:12:04,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:04,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:12:04,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:12:04,226 INFO L87 Difference]: Start difference. First operand 10684 states and 40640 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:05,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:05,193 INFO L93 Difference]: Finished difference Result 18448 states and 66382 transitions. [2021-06-12 22:12:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:12:05,194 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-12 22:12:05,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:05,278 INFO L225 Difference]: With dead ends: 18448 [2021-06-12 22:12:05,278 INFO L226 Difference]: Without dead ends: 18448 [2021-06-12 22:12:05,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 600.9ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:12:05,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18448 states. [2021-06-12 22:12:05,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18448 to 10911. [2021-06-12 22:12:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10911 states, 10910 states have (on average 3.807332722273144) internal successors, (41538), 10910 states have internal predecessors, (41538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:05,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10911 states to 10911 states and 41538 transitions. [2021-06-12 22:12:05,514 INFO L78 Accepts]: Start accepts. Automaton has 10911 states and 41538 transitions. Word has length 28 [2021-06-12 22:12:05,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:05,514 INFO L482 AbstractCegarLoop]: Abstraction has 10911 states and 41538 transitions. [2021-06-12 22:12:05,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 10911 states and 41538 transitions. [2021-06-12 22:12:05,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:05,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:05,530 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:05,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4117 [2021-06-12 22:12:05,730 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:05,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:05,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 107 times [2021-06-12 22:12:05,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:05,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585619477] [2021-06-12 22:12:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:05,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:05,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585619477] [2021-06-12 22:12:05,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585619477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:05,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780657757] [2021-06-12 22:12:05,767 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:05,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:12:05,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:05,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:05,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:05,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780657757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:05,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:05,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:12:05,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539176869] [2021-06-12 22:12:05,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:12:05,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:05,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:12:05,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:12:05,870 INFO L87 Difference]: Start difference. First operand 10911 states and 41538 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:06,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:06,740 INFO L93 Difference]: Finished difference Result 18161 states and 65584 transitions. [2021-06-12 22:12:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:12:06,740 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-12 22:12:06,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:06,777 INFO L225 Difference]: With dead ends: 18161 [2021-06-12 22:12:06,777 INFO L226 Difference]: Without dead ends: 18149 [2021-06-12 22:12:06,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 509.1ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:12:06,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18149 states. [2021-06-12 22:12:07,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18149 to 11013. [2021-06-12 22:12:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11013 states, 11012 states have (on average 3.801398474391573) internal successors, (41861), 11012 states have internal predecessors, (41861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:07,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11013 states to 11013 states and 41861 transitions. [2021-06-12 22:12:07,039 INFO L78 Accepts]: Start accepts. Automaton has 11013 states and 41861 transitions. Word has length 28 [2021-06-12 22:12:07,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:07,039 INFO L482 AbstractCegarLoop]: Abstraction has 11013 states and 41861 transitions. [2021-06-12 22:12:07,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:07,039 INFO L276 IsEmpty]: Start isEmpty. Operand 11013 states and 41861 transitions. [2021-06-12 22:12:07,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:07,055 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:07,055 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:07,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4118,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:07,255 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:07,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:07,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 70 times [2021-06-12 22:12:07,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:07,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713590349] [2021-06-12 22:12:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:07,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:07,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713590349] [2021-06-12 22:12:07,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713590349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:07,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724342301] [2021-06-12 22:12:07,294 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:07,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:12:07,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:07,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:07,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:07,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724342301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:07,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:07,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:12:07,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900706222] [2021-06-12 22:12:07,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:12:07,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:07,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:12:07,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:12:07,380 INFO L87 Difference]: Start difference. First operand 11013 states and 41861 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:07,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:07,823 INFO L93 Difference]: Finished difference Result 15676 states and 57990 transitions. [2021-06-12 22:12:07,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:12:07,824 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-12 22:12:07,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:07,854 INFO L225 Difference]: With dead ends: 15676 [2021-06-12 22:12:07,854 INFO L226 Difference]: Without dead ends: 15676 [2021-06-12 22:12:07,855 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 265.2ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:12:07,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15676 states. [2021-06-12 22:12:08,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15676 to 11085. [2021-06-12 22:12:08,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11085 states, 11084 states have (on average 3.7969144713099965) internal successors, (42085), 11084 states have internal predecessors, (42085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:08,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11085 states to 11085 states and 42085 transitions. [2021-06-12 22:12:08,076 INFO L78 Accepts]: Start accepts. Automaton has 11085 states and 42085 transitions. Word has length 28 [2021-06-12 22:12:08,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:08,076 INFO L482 AbstractCegarLoop]: Abstraction has 11085 states and 42085 transitions. [2021-06-12 22:12:08,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:08,076 INFO L276 IsEmpty]: Start isEmpty. Operand 11085 states and 42085 transitions. [2021-06-12 22:12:08,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:08,092 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:08,092 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:08,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4119 [2021-06-12 22:12:08,293 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:08,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:08,293 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 71 times [2021-06-12 22:12:08,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:08,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622625712] [2021-06-12 22:12:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:08,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:08,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622625712] [2021-06-12 22:12:08,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622625712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:08,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986876507] [2021-06-12 22:12:08,325 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:08,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:12:08,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:08,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:08,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:08,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986876507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:08,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:08,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:12:08,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018084372] [2021-06-12 22:12:08,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:12:08,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:08,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:12:08,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:12:08,408 INFO L87 Difference]: Start difference. First operand 11085 states and 42085 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:08,881 INFO L93 Difference]: Finished difference Result 16651 states and 60827 transitions. [2021-06-12 22:12:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:12:08,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-12 22:12:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:08,913 INFO L225 Difference]: With dead ends: 16651 [2021-06-12 22:12:08,913 INFO L226 Difference]: Without dead ends: 16651 [2021-06-12 22:12:08,913 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:12:08,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16651 states. [2021-06-12 22:12:09,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16651 to 11413. [2021-06-12 22:12:09,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11413 states, 11412 states have (on average 3.7797932001402033) internal successors, (43135), 11412 states have internal predecessors, (43135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11413 states to 11413 states and 43135 transitions. [2021-06-12 22:12:09,145 INFO L78 Accepts]: Start accepts. Automaton has 11413 states and 43135 transitions. Word has length 28 [2021-06-12 22:12:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:09,145 INFO L482 AbstractCegarLoop]: Abstraction has 11413 states and 43135 transitions. [2021-06-12 22:12:09,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 11413 states and 43135 transitions. [2021-06-12 22:12:09,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:09,161 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:09,161 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:09,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4120 [2021-06-12 22:12:09,361 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:09,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:09,362 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 72 times [2021-06-12 22:12:09,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:09,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938517185] [2021-06-12 22:12:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:09,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:09,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938517185] [2021-06-12 22:12:09,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938517185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:09,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099668819] [2021-06-12 22:12:09,393 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:09,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:12:09,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:09,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:09,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:09,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099668819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:09,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:09,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:12:09,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540104247] [2021-06-12 22:12:09,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:12:09,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:09,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:12:09,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:12:09,474 INFO L87 Difference]: Start difference. First operand 11413 states and 43135 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:09,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:09,867 INFO L93 Difference]: Finished difference Result 16138 states and 59485 transitions. [2021-06-12 22:12:09,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:12:09,867 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-12 22:12:09,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:09,945 INFO L225 Difference]: With dead ends: 16138 [2021-06-12 22:12:09,945 INFO L226 Difference]: Without dead ends: 16130 [2021-06-12 22:12:09,945 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:12:09,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16130 states. [2021-06-12 22:12:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16130 to 11353. [2021-06-12 22:12:10,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11353 states, 11352 states have (on average 3.781800563777308) internal successors, (42931), 11352 states have internal predecessors, (42931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:10,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 42931 transitions. [2021-06-12 22:12:10,159 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 42931 transitions. Word has length 28 [2021-06-12 22:12:10,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:10,159 INFO L482 AbstractCegarLoop]: Abstraction has 11353 states and 42931 transitions. [2021-06-12 22:12:10,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:10,159 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 42931 transitions. [2021-06-12 22:12:10,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:10,176 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:10,176 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:10,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4121 [2021-06-12 22:12:10,377 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:10,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:10,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 73 times [2021-06-12 22:12:10,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:10,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20228762] [2021-06-12 22:12:10,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:10,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:10,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20228762] [2021-06-12 22:12:10,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20228762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:10,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597530884] [2021-06-12 22:12:10,432 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:10,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:10,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:10,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597530884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:10,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:10,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:12:10,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073871359] [2021-06-12 22:12:10,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:12:10,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:10,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:12:10,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:12:10,508 INFO L87 Difference]: Start difference. First operand 11353 states and 42931 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:10,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:10,922 INFO L93 Difference]: Finished difference Result 16038 states and 59197 transitions. [2021-06-12 22:12:10,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:12:10,922 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-12 22:12:10,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:10,953 INFO L225 Difference]: With dead ends: 16038 [2021-06-12 22:12:10,953 INFO L226 Difference]: Without dead ends: 16026 [2021-06-12 22:12:10,953 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:12:10,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16026 states. [2021-06-12 22:12:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16026 to 11325. [2021-06-12 22:12:11,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11325 states, 11324 states have (on average 3.7826739667961853) internal successors, (42835), 11324 states have internal predecessors, (42835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:11,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11325 states to 11325 states and 42835 transitions. [2021-06-12 22:12:11,175 INFO L78 Accepts]: Start accepts. Automaton has 11325 states and 42835 transitions. Word has length 28 [2021-06-12 22:12:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:11,175 INFO L482 AbstractCegarLoop]: Abstraction has 11325 states and 42835 transitions. [2021-06-12 22:12:11,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 11325 states and 42835 transitions. [2021-06-12 22:12:11,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:11,191 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:11,191 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:11,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4122 [2021-06-12 22:12:11,392 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:11,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:11,392 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 74 times [2021-06-12 22:12:11,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:11,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62228563] [2021-06-12 22:12:11,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:11,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:11,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62228563] [2021-06-12 22:12:11,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62228563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:11,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393046423] [2021-06-12 22:12:11,424 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:11,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:11,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:11,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:11,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:11,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393046423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:11,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:11,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:12:11,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94394586] [2021-06-12 22:12:11,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:12:11,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:11,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:12:11,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:12:11,532 INFO L87 Difference]: Start difference. First operand 11325 states and 42835 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:12,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:12,419 INFO L93 Difference]: Finished difference Result 21822 states and 77756 transitions. [2021-06-12 22:12:12,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:12:12,419 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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 28 [2021-06-12 22:12:12,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:12,459 INFO L225 Difference]: With dead ends: 21822 [2021-06-12 22:12:12,459 INFO L226 Difference]: Without dead ends: 21822 [2021-06-12 22:12:12,459 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 466.8ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:12:12,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21822 states. [2021-06-12 22:12:12,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21822 to 11307. [2021-06-12 22:12:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11307 states, 11306 states have (on average 3.7813550327259864) internal successors, (42752), 11306 states have internal predecessors, (42752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11307 states to 11307 states and 42752 transitions. [2021-06-12 22:12:12,707 INFO L78 Accepts]: Start accepts. Automaton has 11307 states and 42752 transitions. Word has length 28 [2021-06-12 22:12:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:12,707 INFO L482 AbstractCegarLoop]: Abstraction has 11307 states and 42752 transitions. [2021-06-12 22:12:12,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:12,707 INFO L276 IsEmpty]: Start isEmpty. Operand 11307 states and 42752 transitions. [2021-06-12 22:12:12,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:12,723 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:12,723 INFO L472 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] [2021-06-12 22:12:12,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4123 [2021-06-12 22:12:12,923 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:12,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:12,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 108 times [2021-06-12 22:12:12,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:12,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792183923] [2021-06-12 22:12:12,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:12,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:12,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792183923] [2021-06-12 22:12:12,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792183923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:12,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628750804] [2021-06-12 22:12:12,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:12,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:12:12,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:12,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:12:12,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:13,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628750804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:13,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:13,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:12:13,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574356019] [2021-06-12 22:12:13,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:12:13,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:13,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:12:13,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:12:13,048 INFO L87 Difference]: Start difference. First operand 11307 states and 42752 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:13,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:13,683 INFO L93 Difference]: Finished difference Result 17653 states and 63688 transitions. [2021-06-12 22:12:13,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:12:13,684 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:12:13,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:13,716 INFO L225 Difference]: With dead ends: 17653 [2021-06-12 22:12:13,716 INFO L226 Difference]: Without dead ends: 17640 [2021-06-12 22:12:13,716 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:12:13,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17640 states. [2021-06-12 22:12:13,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17640 to 12618. [2021-06-12 22:12:13,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12618 states, 12617 states have (on average 3.8484584291035904) internal successors, (48556), 12617 states have internal predecessors, (48556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12618 states to 12618 states and 48556 transitions. [2021-06-12 22:12:13,980 INFO L78 Accepts]: Start accepts. Automaton has 12618 states and 48556 transitions. Word has length 28 [2021-06-12 22:12:13,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:13,980 INFO L482 AbstractCegarLoop]: Abstraction has 12618 states and 48556 transitions. [2021-06-12 22:12:13,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 12618 states and 48556 transitions. [2021-06-12 22:12:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:13,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:13,999 INFO L472 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] [2021-06-12 22:12:14,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4124,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:14,201 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:14,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:14,201 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 109 times [2021-06-12 22:12:14,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:14,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846067248] [2021-06-12 22:12:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:14,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:14,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846067248] [2021-06-12 22:12:14,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846067248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:14,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994185665] [2021-06-12 22:12:14,225 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:14,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:12:14,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:14,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994185665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:14,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:14,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:12:14,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110127064] [2021-06-12 22:12:14,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:12:14,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:14,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:12:14,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:12:14,324 INFO L87 Difference]: Start difference. First operand 12618 states and 48556 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:15,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:15,037 INFO L93 Difference]: Finished difference Result 17754 states and 63945 transitions. [2021-06-12 22:12:15,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:12:15,037 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:12:15,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:15,069 INFO L225 Difference]: With dead ends: 17754 [2021-06-12 22:12:15,070 INFO L226 Difference]: Without dead ends: 17748 [2021-06-12 22:12:15,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 366.6ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:12:15,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17748 states. [2021-06-12 22:12:15,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17748 to 12591. [2021-06-12 22:12:15,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12591 states, 12590 states have (on average 3.8476568705321683) internal successors, (48442), 12590 states have internal predecessors, (48442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:15,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12591 states to 12591 states and 48442 transitions. [2021-06-12 22:12:15,347 INFO L78 Accepts]: Start accepts. Automaton has 12591 states and 48442 transitions. Word has length 28 [2021-06-12 22:12:15,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:15,347 INFO L482 AbstractCegarLoop]: Abstraction has 12591 states and 48442 transitions. [2021-06-12 22:12:15,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:15,347 INFO L276 IsEmpty]: Start isEmpty. Operand 12591 states and 48442 transitions. [2021-06-12 22:12:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:15,366 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:15,366 INFO L472 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] [2021-06-12 22:12:15,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4125,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:15,567 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:15,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:15,567 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 110 times [2021-06-12 22:12:15,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:15,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618708743] [2021-06-12 22:12:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:15,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:15,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618708743] [2021-06-12 22:12:15,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618708743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:15,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312086227] [2021-06-12 22:12:15,591 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:15,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:15,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:15,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:12:15,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:15,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312086227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:15,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:15,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:12:15,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854943171] [2021-06-12 22:12:15,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:12:15,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:15,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:12:15,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:12:15,684 INFO L87 Difference]: Start difference. First operand 12591 states and 48442 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:16,265 INFO L93 Difference]: Finished difference Result 19810 states and 71449 transitions. [2021-06-12 22:12:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:12:16,266 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-12 22:12:16,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:16,307 INFO L225 Difference]: With dead ends: 19810 [2021-06-12 22:12:16,307 INFO L226 Difference]: Without dead ends: 19797 [2021-06-12 22:12:16,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 292.3ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:12:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19797 states. [2021-06-12 22:12:16,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19797 to 12651. [2021-06-12 22:12:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12651 states, 12650 states have (on average 3.8523320158102767) internal successors, (48732), 12650 states have internal predecessors, (48732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12651 states to 12651 states and 48732 transitions. [2021-06-12 22:12:16,682 INFO L78 Accepts]: Start accepts. Automaton has 12651 states and 48732 transitions. Word has length 28 [2021-06-12 22:12:16,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:16,682 INFO L482 AbstractCegarLoop]: Abstraction has 12651 states and 48732 transitions. [2021-06-12 22:12:16,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:16,683 INFO L276 IsEmpty]: Start isEmpty. Operand 12651 states and 48732 transitions. [2021-06-12 22:12:16,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:16,702 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:16,702 INFO L472 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] [2021-06-12 22:12:16,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4126,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:16,902 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:16,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:16,902 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 111 times [2021-06-12 22:12:16,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:16,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54961209] [2021-06-12 22:12:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:16,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:16,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54961209] [2021-06-12 22:12:16,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54961209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:16,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612506028] [2021-06-12 22:12:16,927 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:16,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:12:16,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:16,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:12:16,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:17,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612506028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:17,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:17,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:12:17,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109094078] [2021-06-12 22:12:17,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:12:17,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:17,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:12:17,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:12:17,022 INFO L87 Difference]: Start difference. First operand 12651 states and 48732 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:17,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:17,640 INFO L93 Difference]: Finished difference Result 20959 states and 75039 transitions. [2021-06-12 22:12:17,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:12:17,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-12 22:12:17,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:17,679 INFO L225 Difference]: With dead ends: 20959 [2021-06-12 22:12:17,679 INFO L226 Difference]: Without dead ends: 20959 [2021-06-12 22:12:17,679 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 348.1ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:12:17,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20959 states. [2021-06-12 22:12:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20959 to 12667. [2021-06-12 22:12:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12667 states, 12666 states have (on average 3.849281541133744) internal successors, (48755), 12666 states have internal predecessors, (48755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12667 states to 12667 states and 48755 transitions. [2021-06-12 22:12:17,976 INFO L78 Accepts]: Start accepts. Automaton has 12667 states and 48755 transitions. Word has length 28 [2021-06-12 22:12:17,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:17,976 INFO L482 AbstractCegarLoop]: Abstraction has 12667 states and 48755 transitions. [2021-06-12 22:12:17,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:17,976 INFO L276 IsEmpty]: Start isEmpty. Operand 12667 states and 48755 transitions. [2021-06-12 22:12:17,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:17,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:17,995 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:18,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4127,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:18,195 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:18,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:18,195 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 75 times [2021-06-12 22:12:18,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:18,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185253853] [2021-06-12 22:12:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:18,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:18,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185253853] [2021-06-12 22:12:18,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185253853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:18,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392979969] [2021-06-12 22:12:18,226 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:18,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:12:18,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:18,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:18,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:18,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392979969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:18,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:18,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:12:18,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195986613] [2021-06-12 22:12:18,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:12:18,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:18,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:12:18,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:12:18,318 INFO L87 Difference]: Start difference. First operand 12667 states and 48755 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:19,233 INFO L93 Difference]: Finished difference Result 22039 states and 80934 transitions. [2021-06-12 22:12:19,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:12:19,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-06-12 22:12:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:19,280 INFO L225 Difference]: With dead ends: 22039 [2021-06-12 22:12:19,280 INFO L226 Difference]: Without dead ends: 22035 [2021-06-12 22:12:19,280 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 482.6ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:12:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22035 states. [2021-06-12 22:12:19,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22035 to 12921. [2021-06-12 22:12:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12921 states, 12920 states have (on average 3.8388544891640866) internal successors, (49598), 12920 states have internal predecessors, (49598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:19,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12921 states to 12921 states and 49598 transitions. [2021-06-12 22:12:19,622 INFO L78 Accepts]: Start accepts. Automaton has 12921 states and 49598 transitions. Word has length 28 [2021-06-12 22:12:19,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:19,622 INFO L482 AbstractCegarLoop]: Abstraction has 12921 states and 49598 transitions. [2021-06-12 22:12:19,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:19,622 INFO L276 IsEmpty]: Start isEmpty. Operand 12921 states and 49598 transitions. [2021-06-12 22:12:19,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:19,642 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:19,642 INFO L472 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] [2021-06-12 22:12:19,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4128,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:19,842 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:19,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:19,843 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 112 times [2021-06-12 22:12:19,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:19,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959660229] [2021-06-12 22:12:19,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:19,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:19,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959660229] [2021-06-12 22:12:19,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959660229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:19,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762111871] [2021-06-12 22:12:19,871 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:19,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:12:19,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:19,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:12:19,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:19,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762111871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:19,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:19,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:12:19,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224893372] [2021-06-12 22:12:19,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:12:19,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:19,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:12:19,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:12:19,959 INFO L87 Difference]: Start difference. First operand 12921 states and 49598 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:20,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:20,548 INFO L93 Difference]: Finished difference Result 18745 states and 68634 transitions. [2021-06-12 22:12:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:12:20,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-06-12 22:12:20,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:20,586 INFO L225 Difference]: With dead ends: 18745 [2021-06-12 22:12:20,586 INFO L226 Difference]: Without dead ends: 18722 [2021-06-12 22:12:20,586 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 304.0ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:12:20,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18722 states. [2021-06-12 22:12:20,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18722 to 13216. [2021-06-12 22:12:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13216 states, 13215 states have (on average 3.855996973136587) internal successors, (50957), 13215 states have internal predecessors, (50957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13216 states to 13216 states and 50957 transitions. [2021-06-12 22:12:20,866 INFO L78 Accepts]: Start accepts. Automaton has 13216 states and 50957 transitions. Word has length 28 [2021-06-12 22:12:20,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:20,866 INFO L482 AbstractCegarLoop]: Abstraction has 13216 states and 50957 transitions. [2021-06-12 22:12:20,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:20,866 INFO L276 IsEmpty]: Start isEmpty. Operand 13216 states and 50957 transitions. [2021-06-12 22:12:20,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:20,886 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:20,886 INFO L472 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] [2021-06-12 22:12:21,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4129,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:21,086 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:21,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:21,087 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 113 times [2021-06-12 22:12:21,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:21,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894401571] [2021-06-12 22:12:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:21,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:21,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894401571] [2021-06-12 22:12:21,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894401571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:21,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714807510] [2021-06-12 22:12:21,115 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:21,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:12:21,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:21,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:12:21,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:21,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714807510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:21,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:21,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:12:21,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156945254] [2021-06-12 22:12:21,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:12:21,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:21,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:12:21,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:12:21,205 INFO L87 Difference]: Start difference. First operand 13216 states and 50957 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:21,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:21,900 INFO L93 Difference]: Finished difference Result 18738 states and 67728 transitions. [2021-06-12 22:12:21,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:12:21,904 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-06-12 22:12:21,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:21,940 INFO L225 Difference]: With dead ends: 18738 [2021-06-12 22:12:21,940 INFO L226 Difference]: Without dead ends: 18738 [2021-06-12 22:12:21,940 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 414.3ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:12:21,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18738 states. [2021-06-12 22:12:22,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18738 to 13171. [2021-06-12 22:12:22,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13171 states, 13170 states have (on average 3.847835990888383) internal successors, (50676), 13170 states have internal predecessors, (50676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13171 states to 13171 states and 50676 transitions. [2021-06-12 22:12:22,221 INFO L78 Accepts]: Start accepts. Automaton has 13171 states and 50676 transitions. Word has length 28 [2021-06-12 22:12:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:22,222 INFO L482 AbstractCegarLoop]: Abstraction has 13171 states and 50676 transitions. [2021-06-12 22:12:22,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 13171 states and 50676 transitions. [2021-06-12 22:12:22,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:22,242 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:22,242 INFO L472 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] [2021-06-12 22:12:22,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4130,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:22,453 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:22,453 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 114 times [2021-06-12 22:12:22,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:22,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757599880] [2021-06-12 22:12:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:22,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:22,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757599880] [2021-06-12 22:12:22,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757599880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:22,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660429841] [2021-06-12 22:12:22,482 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:22,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:12:22,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:22,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:12:22,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:22,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660429841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:22,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:22,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:12:22,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367499006] [2021-06-12 22:12:22,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:12:22,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:22,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:12:22,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:12:22,571 INFO L87 Difference]: Start difference. First operand 13171 states and 50676 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:23,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:23,182 INFO L93 Difference]: Finished difference Result 20089 states and 73010 transitions. [2021-06-12 22:12:23,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:12:23,182 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-06-12 22:12:23,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:23,222 INFO L225 Difference]: With dead ends: 20089 [2021-06-12 22:12:23,223 INFO L226 Difference]: Without dead ends: 20089 [2021-06-12 22:12:23,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 329.8ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:12:23,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20089 states. [2021-06-12 22:12:23,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20089 to 13878. [2021-06-12 22:12:23,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13878 states, 13877 states have (on average 3.834186063270159) internal successors, (53207), 13877 states have internal predecessors, (53207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13878 states to 13878 states and 53207 transitions. [2021-06-12 22:12:23,593 INFO L78 Accepts]: Start accepts. Automaton has 13878 states and 53207 transitions. Word has length 28 [2021-06-12 22:12:23,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:23,594 INFO L482 AbstractCegarLoop]: Abstraction has 13878 states and 53207 transitions. [2021-06-12 22:12:23,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:23,594 INFO L276 IsEmpty]: Start isEmpty. Operand 13878 states and 53207 transitions. [2021-06-12 22:12:23,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:23,614 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:23,614 INFO L472 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] [2021-06-12 22:12:23,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4131 [2021-06-12 22:12:23,817 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:23,817 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 115 times [2021-06-12 22:12:23,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:23,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297722734] [2021-06-12 22:12:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:23,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:23,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297722734] [2021-06-12 22:12:23,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297722734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:23,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88794525] [2021-06-12 22:12:23,846 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:23,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:12:23,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:23,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88794525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:23,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:23,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:12:23,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713929520] [2021-06-12 22:12:23,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:12:23,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:23,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:12:23,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:12:23,942 INFO L87 Difference]: Start difference. First operand 13878 states and 53207 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:24,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:24,732 INFO L93 Difference]: Finished difference Result 22502 states and 80640 transitions. [2021-06-12 22:12:24,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:12:24,732 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-06-12 22:12:24,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:24,776 INFO L225 Difference]: With dead ends: 22502 [2021-06-12 22:12:24,776 INFO L226 Difference]: Without dead ends: 22502 [2021-06-12 22:12:24,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 434.2ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:12:24,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22502 states. [2021-06-12 22:12:25,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22502 to 14104. [2021-06-12 22:12:25,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14104 states, 14103 states have (on average 3.8464156562433525) internal successors, (54246), 14103 states have internal predecessors, (54246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:25,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14104 states to 14104 states and 54246 transitions. [2021-06-12 22:12:25,094 INFO L78 Accepts]: Start accepts. Automaton has 14104 states and 54246 transitions. Word has length 28 [2021-06-12 22:12:25,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:25,094 INFO L482 AbstractCegarLoop]: Abstraction has 14104 states and 54246 transitions. [2021-06-12 22:12:25,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:25,094 INFO L276 IsEmpty]: Start isEmpty. Operand 14104 states and 54246 transitions. [2021-06-12 22:12:25,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:25,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:25,115 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:25,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4132 [2021-06-12 22:12:25,315 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:25,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:25,315 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 76 times [2021-06-12 22:12:25,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:25,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765885160] [2021-06-12 22:12:25,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:25,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:25,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765885160] [2021-06-12 22:12:25,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765885160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:25,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390388889] [2021-06-12 22:12:25,348 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:25,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:12:25,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:25,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:25,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:25,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390388889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:25,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:25,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:12:25,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847494488] [2021-06-12 22:12:25,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:12:25,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:25,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:12:25,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:12:25,467 INFO L87 Difference]: Start difference. First operand 14104 states and 54246 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:26,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:26,854 INFO L93 Difference]: Finished difference Result 39134 states and 140671 transitions. [2021-06-12 22:12:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:12:26,854 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:12:26,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:26,943 INFO L225 Difference]: With dead ends: 39134 [2021-06-12 22:12:26,943 INFO L226 Difference]: Without dead ends: 39134 [2021-06-12 22:12:26,943 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 807.8ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:12:26,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39134 states. [2021-06-12 22:12:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39134 to 15340. [2021-06-12 22:12:27,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15340 states, 15339 states have (on average 3.892887411174131) internal successors, (59713), 15339 states have internal predecessors, (59713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15340 states to 15340 states and 59713 transitions. [2021-06-12 22:12:27,497 INFO L78 Accepts]: Start accepts. Automaton has 15340 states and 59713 transitions. Word has length 28 [2021-06-12 22:12:27,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:27,497 INFO L482 AbstractCegarLoop]: Abstraction has 15340 states and 59713 transitions. [2021-06-12 22:12:27,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:27,497 INFO L276 IsEmpty]: Start isEmpty. Operand 15340 states and 59713 transitions. [2021-06-12 22:12:27,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:27,522 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:27,522 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:27,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4133 [2021-06-12 22:12:27,737 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:27,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:27,737 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 77 times [2021-06-12 22:12:27,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:27,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850992853] [2021-06-12 22:12:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:27,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:27,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850992853] [2021-06-12 22:12:27,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850992853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:27,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116058252] [2021-06-12 22:12:27,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:27,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:12:27,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:27,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:27,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:27,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116058252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:27,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:27,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:12:27,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734906461] [2021-06-12 22:12:27,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:12:27,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:27,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:12:27,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:12:27,888 INFO L87 Difference]: Start difference. First operand 15340 states and 59713 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:29,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:29,288 INFO L93 Difference]: Finished difference Result 38160 states and 138109 transitions. [2021-06-12 22:12:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:12:29,288 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:12:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:29,379 INFO L225 Difference]: With dead ends: 38160 [2021-06-12 22:12:29,379 INFO L226 Difference]: Without dead ends: 38160 [2021-06-12 22:12:29,380 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 811.8ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:12:29,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38160 states. [2021-06-12 22:12:29,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38160 to 15314. [2021-06-12 22:12:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15314 states, 15313 states have (on average 3.88930973682492) internal successors, (59557), 15313 states have internal predecessors, (59557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15314 states to 15314 states and 59557 transitions. [2021-06-12 22:12:29,887 INFO L78 Accepts]: Start accepts. Automaton has 15314 states and 59557 transitions. Word has length 28 [2021-06-12 22:12:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:29,887 INFO L482 AbstractCegarLoop]: Abstraction has 15314 states and 59557 transitions. [2021-06-12 22:12:29,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:29,888 INFO L276 IsEmpty]: Start isEmpty. Operand 15314 states and 59557 transitions. [2021-06-12 22:12:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:29,910 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:29,910 INFO L472 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] [2021-06-12 22:12:30,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4134 [2021-06-12 22:12:30,110 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:30,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:30,111 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 116 times [2021-06-12 22:12:30,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:30,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492353716] [2021-06-12 22:12:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:30,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:30,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492353716] [2021-06-12 22:12:30,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492353716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:30,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991726354] [2021-06-12 22:12:30,141 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:30,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:30,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:30,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:12:30,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:30,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991726354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:30,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:30,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:12:30,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240260013] [2021-06-12 22:12:30,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:12:30,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:30,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:12:30,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:12:30,213 INFO L87 Difference]: Start difference. First operand 15314 states and 59557 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:30,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:30,543 INFO L93 Difference]: Finished difference Result 23675 states and 90680 transitions. [2021-06-12 22:12:30,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:12:30,544 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:12:30,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:30,587 INFO L225 Difference]: With dead ends: 23675 [2021-06-12 22:12:30,587 INFO L226 Difference]: Without dead ends: 23628 [2021-06-12 22:12:30,587 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:12:30,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23628 states. [2021-06-12 22:12:30,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23628 to 20433. [2021-06-12 22:12:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20433 states, 20432 states have (on average 3.903680501174628) internal successors, (79760), 20432 states have internal predecessors, (79760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:30,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20433 states to 20433 states and 79760 transitions. [2021-06-12 22:12:30,942 INFO L78 Accepts]: Start accepts. Automaton has 20433 states and 79760 transitions. Word has length 28 [2021-06-12 22:12:30,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:30,942 INFO L482 AbstractCegarLoop]: Abstraction has 20433 states and 79760 transitions. [2021-06-12 22:12:30,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:30,942 INFO L276 IsEmpty]: Start isEmpty. Operand 20433 states and 79760 transitions. [2021-06-12 22:12:30,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:30,971 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:30,971 INFO L472 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] [2021-06-12 22:12:31,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4135,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:31,172 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:31,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:31,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 117 times [2021-06-12 22:12:31,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:31,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285215882] [2021-06-12 22:12:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:31,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:31,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285215882] [2021-06-12 22:12:31,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285215882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:31,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188420876] [2021-06-12 22:12:31,198 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:31,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:12:31,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:31,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:12:31,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:31,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188420876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:31,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:31,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:12:31,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897559736] [2021-06-12 22:12:31,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:12:31,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:31,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:12:31,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:12:31,272 INFO L87 Difference]: Start difference. First operand 20433 states and 79760 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:31,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:31,492 INFO L93 Difference]: Finished difference Result 23187 states and 88130 transitions. [2021-06-12 22:12:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:12:31,493 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-06-12 22:12:31,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:31,542 INFO L225 Difference]: With dead ends: 23187 [2021-06-12 22:12:31,542 INFO L226 Difference]: Without dead ends: 23187 [2021-06-12 22:12:31,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:12:31,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23187 states. [2021-06-12 22:12:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23187 to 19936. [2021-06-12 22:12:31,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19936 states, 19935 states have (on average 3.89204915976925) internal successors, (77588), 19935 states have internal predecessors, (77588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19936 states to 19936 states and 77588 transitions. [2021-06-12 22:12:31,921 INFO L78 Accepts]: Start accepts. Automaton has 19936 states and 77588 transitions. Word has length 28 [2021-06-12 22:12:31,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:31,922 INFO L482 AbstractCegarLoop]: Abstraction has 19936 states and 77588 transitions. [2021-06-12 22:12:31,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:31,922 INFO L276 IsEmpty]: Start isEmpty. Operand 19936 states and 77588 transitions. [2021-06-12 22:12:32,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:32,070 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:32,071 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:32,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4136,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:32,285 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:32,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:32,285 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 118 times [2021-06-12 22:12:32,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:32,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332149177] [2021-06-12 22:12:32,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:32,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:32,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332149177] [2021-06-12 22:12:32,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332149177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:32,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399115536] [2021-06-12 22:12:32,319 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:32,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:12:32,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:32,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:32,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:32,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399115536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:32,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:32,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 22:12:32,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573651050] [2021-06-12 22:12:32,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:12:32,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:32,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:12:32,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:12:32,509 INFO L87 Difference]: Start difference. First operand 19936 states and 77588 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:33,385 INFO L93 Difference]: Finished difference Result 31776 states and 117695 transitions. [2021-06-12 22:12:33,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:12:33,391 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 28 [2021-06-12 22:12:33,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:33,457 INFO L225 Difference]: With dead ends: 31776 [2021-06-12 22:12:33,457 INFO L226 Difference]: Without dead ends: 31776 [2021-06-12 22:12:33,457 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 442.3ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:12:33,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31776 states. [2021-06-12 22:12:33,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31776 to 20002. [2021-06-12 22:12:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20002 states, 20001 states have (on average 3.8901054947252636) internal successors, (77806), 20001 states have internal predecessors, (77806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:33,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20002 states to 20002 states and 77806 transitions. [2021-06-12 22:12:33,987 INFO L78 Accepts]: Start accepts. Automaton has 20002 states and 77806 transitions. Word has length 28 [2021-06-12 22:12:33,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:33,987 INFO L482 AbstractCegarLoop]: Abstraction has 20002 states and 77806 transitions. [2021-06-12 22:12:33,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:33,987 INFO L276 IsEmpty]: Start isEmpty. Operand 20002 states and 77806 transitions. [2021-06-12 22:12:34,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:34,016 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:34,016 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:34,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4137,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:34,216 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:34,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:34,216 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 119 times [2021-06-12 22:12:34,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:34,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929398333] [2021-06-12 22:12:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:34,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:34,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929398333] [2021-06-12 22:12:34,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929398333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:34,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867488824] [2021-06-12 22:12:34,250 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:34,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:12:34,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:34,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:34,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:34,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867488824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:34,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:34,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:12:34,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335608480] [2021-06-12 22:12:34,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:12:34,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:34,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:12:34,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:12:34,441 INFO L87 Difference]: Start difference. First operand 20002 states and 77806 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:35,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:35,837 INFO L93 Difference]: Finished difference Result 40610 states and 148783 transitions. [2021-06-12 22:12:35,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-12 22:12:35,837 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:12:35,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:35,928 INFO L225 Difference]: With dead ends: 40610 [2021-06-12 22:12:35,928 INFO L226 Difference]: Without dead ends: 40610 [2021-06-12 22:12:35,929 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 855.7ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 22:12:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40610 states. [2021-06-12 22:12:36,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40610 to 20007. [2021-06-12 22:12:36,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20007 states, 20006 states have (on average 3.892182345296411) internal successors, (77867), 20006 states have internal predecessors, (77867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:36,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20007 states to 20007 states and 77867 transitions. [2021-06-12 22:12:36,583 INFO L78 Accepts]: Start accepts. Automaton has 20007 states and 77867 transitions. Word has length 28 [2021-06-12 22:12:36,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:36,584 INFO L482 AbstractCegarLoop]: Abstraction has 20007 states and 77867 transitions. [2021-06-12 22:12:36,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:36,584 INFO L276 IsEmpty]: Start isEmpty. Operand 20007 states and 77867 transitions. [2021-06-12 22:12:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:36,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:36,611 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:36,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4138 [2021-06-12 22:12:36,811 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:36,812 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 120 times [2021-06-12 22:12:36,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:36,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976985859] [2021-06-12 22:12:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:36,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:36,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976985859] [2021-06-12 22:12:36,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976985859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:36,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036131650] [2021-06-12 22:12:36,845 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:36,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:12:36,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:36,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:36,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:36,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036131650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:36,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:36,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:12:36,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649365758] [2021-06-12 22:12:36,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:12:36,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:36,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:12:36,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:12:36,954 INFO L87 Difference]: Start difference. First operand 20007 states and 77867 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:38,407 INFO L93 Difference]: Finished difference Result 40173 states and 147928 transitions. [2021-06-12 22:12:38,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:12:38,408 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:12:38,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:38,506 INFO L225 Difference]: With dead ends: 40173 [2021-06-12 22:12:38,506 INFO L226 Difference]: Without dead ends: 40173 [2021-06-12 22:12:38,506 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 775.0ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 22:12:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40173 states. [2021-06-12 22:12:39,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40173 to 19795. [2021-06-12 22:12:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19795 states, 19794 states have (on average 3.884308376275639) internal successors, (76886), 19794 states have internal predecessors, (76886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19795 states to 19795 states and 76886 transitions. [2021-06-12 22:12:39,163 INFO L78 Accepts]: Start accepts. Automaton has 19795 states and 76886 transitions. Word has length 28 [2021-06-12 22:12:39,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:39,163 INFO L482 AbstractCegarLoop]: Abstraction has 19795 states and 76886 transitions. [2021-06-12 22:12:39,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:39,163 INFO L276 IsEmpty]: Start isEmpty. Operand 19795 states and 76886 transitions. [2021-06-12 22:12:39,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:39,192 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:39,192 INFO L472 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] [2021-06-12 22:12:39,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4139,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:39,392 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:39,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:39,392 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 121 times [2021-06-12 22:12:39,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:39,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734829513] [2021-06-12 22:12:39,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:39,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:39,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734829513] [2021-06-12 22:12:39,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734829513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:39,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081534128] [2021-06-12 22:12:39,418 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:39,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:12:39,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:12:39,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081534128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:39,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:39,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 22:12:39,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254589468] [2021-06-12 22:12:39,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:12:39,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:39,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:12:39,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:12:39,492 INFO L87 Difference]: Start difference. First operand 19795 states and 76886 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) [2021-06-12 22:12:39,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:39,747 INFO L93 Difference]: Finished difference Result 29286 states and 109348 transitions. [2021-06-12 22:12:39,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:12:39,748 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 28 [2021-06-12 22:12:39,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:39,817 INFO L225 Difference]: With dead ends: 29286 [2021-06-12 22:12:39,817 INFO L226 Difference]: Without dead ends: 29269 [2021-06-12 22:12:39,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:12:39,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29269 states. [2021-06-12 22:12:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29269 to 20063. [2021-06-12 22:12:40,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20063 states, 20062 states have (on average 3.8898414913767323) internal successors, (78038), 20062 states have internal predecessors, (78038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20063 states to 20063 states and 78038 transitions. [2021-06-12 22:12:40,513 INFO L78 Accepts]: Start accepts. Automaton has 20063 states and 78038 transitions. Word has length 28 [2021-06-12 22:12:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:40,513 INFO L482 AbstractCegarLoop]: Abstraction has 20063 states and 78038 transitions. [2021-06-12 22:12:40,513 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) [2021-06-12 22:12:40,513 INFO L276 IsEmpty]: Start isEmpty. Operand 20063 states and 78038 transitions. [2021-06-12 22:12:40,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:40,542 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:40,542 INFO L472 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] [2021-06-12 22:12:40,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4140,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:40,742 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:40,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:40,742 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 122 times [2021-06-12 22:12:40,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:40,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414727292] [2021-06-12 22:12:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:40,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:40,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414727292] [2021-06-12 22:12:40,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414727292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:40,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699988264] [2021-06-12 22:12:40,768 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:40,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:40,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:40,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:12:40,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:12:40,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699988264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:40,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:40,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 22:12:40,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431702495] [2021-06-12 22:12:40,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:12:40,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:40,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:12:40,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:12:40,856 INFO L87 Difference]: Start difference. First operand 20063 states and 78038 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) [2021-06-12 22:12:41,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:41,115 INFO L93 Difference]: Finished difference Result 31067 states and 114897 transitions. [2021-06-12 22:12:41,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:12:41,115 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 28 [2021-06-12 22:12:41,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:41,184 INFO L225 Difference]: With dead ends: 31067 [2021-06-12 22:12:41,184 INFO L226 Difference]: Without dead ends: 31067 [2021-06-12 22:12:41,184 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:12:41,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31067 states. [2021-06-12 22:12:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31067 to 19732. [2021-06-12 22:12:41,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19732 states, 19731 states have (on average 3.874714915615022) internal successors, (76452), 19731 states have internal predecessors, (76452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:41,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19732 states to 19732 states and 76452 transitions. [2021-06-12 22:12:41,763 INFO L78 Accepts]: Start accepts. Automaton has 19732 states and 76452 transitions. Word has length 28 [2021-06-12 22:12:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:41,763 INFO L482 AbstractCegarLoop]: Abstraction has 19732 states and 76452 transitions. [2021-06-12 22:12:41,763 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) [2021-06-12 22:12:41,763 INFO L276 IsEmpty]: Start isEmpty. Operand 19732 states and 76452 transitions. [2021-06-12 22:12:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:41,794 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:41,794 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:41,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4141 [2021-06-12 22:12:41,995 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:41,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:41,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 123 times [2021-06-12 22:12:41,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:41,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396936173] [2021-06-12 22:12:41,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:42,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:42,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396936173] [2021-06-12 22:12:42,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396936173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:42,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373668252] [2021-06-12 22:12:42,032 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:42,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:12:42,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:42,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:42,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:42,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373668252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:42,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:42,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:12:42,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319731] [2021-06-12 22:12:42,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:12:42,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:42,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:12:42,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:12:42,134 INFO L87 Difference]: Start difference. First operand 19732 states and 76452 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:42,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:42,942 INFO L93 Difference]: Finished difference Result 29306 states and 108910 transitions. [2021-06-12 22:12:42,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:12:42,942 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:12:42,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:43,006 INFO L225 Difference]: With dead ends: 29306 [2021-06-12 22:12:43,006 INFO L226 Difference]: Without dead ends: 29306 [2021-06-12 22:12:43,007 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 370.1ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:12:43,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29306 states. [2021-06-12 22:12:43,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29306 to 19780. [2021-06-12 22:12:43,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19780 states, 19779 states have (on average 3.8734010819556093) internal successors, (76612), 19779 states have internal predecessors, (76612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:43,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19780 states to 19780 states and 76612 transitions. [2021-06-12 22:12:43,508 INFO L78 Accepts]: Start accepts. Automaton has 19780 states and 76612 transitions. Word has length 28 [2021-06-12 22:12:43,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:43,509 INFO L482 AbstractCegarLoop]: Abstraction has 19780 states and 76612 transitions. [2021-06-12 22:12:43,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:43,509 INFO L276 IsEmpty]: Start isEmpty. Operand 19780 states and 76612 transitions. [2021-06-12 22:12:43,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:43,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:43,536 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:43,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4142 [2021-06-12 22:12:43,737 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:43,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:43,737 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 124 times [2021-06-12 22:12:43,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:43,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545108212] [2021-06-12 22:12:43,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:43,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:43,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:43,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545108212] [2021-06-12 22:12:43,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545108212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:43,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107917179] [2021-06-12 22:12:43,770 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:43,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:12:43,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:43,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:43,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:43,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107917179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:43,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:43,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:12:43,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18060385] [2021-06-12 22:12:43,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:12:43,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:43,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:12:43,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:12:43,866 INFO L87 Difference]: Start difference. First operand 19780 states and 76612 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:44,578 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-12 22:12:45,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:45,086 INFO L93 Difference]: Finished difference Result 30838 states and 113300 transitions. [2021-06-12 22:12:45,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 22:12:45,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:12:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:45,158 INFO L225 Difference]: With dead ends: 30838 [2021-06-12 22:12:45,158 INFO L226 Difference]: Without dead ends: 30838 [2021-06-12 22:12:45,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 704.3ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:12:45,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30838 states. [2021-06-12 22:12:45,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30838 to 20326. [2021-06-12 22:12:45,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20326 states, 20325 states have (on average 3.8521525215252153) internal successors, (78295), 20325 states have internal predecessors, (78295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:45,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20326 states to 20326 states and 78295 transitions. [2021-06-12 22:12:45,744 INFO L78 Accepts]: Start accepts. Automaton has 20326 states and 78295 transitions. Word has length 28 [2021-06-12 22:12:45,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:45,744 INFO L482 AbstractCegarLoop]: Abstraction has 20326 states and 78295 transitions. [2021-06-12 22:12:45,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:45,744 INFO L276 IsEmpty]: Start isEmpty. Operand 20326 states and 78295 transitions. [2021-06-12 22:12:45,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:45,771 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:45,772 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:45,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4143 [2021-06-12 22:12:45,979 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:45,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:45,979 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 125 times [2021-06-12 22:12:45,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:45,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137008656] [2021-06-12 22:12:45,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:46,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:46,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137008656] [2021-06-12 22:12:46,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137008656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:46,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41945973] [2021-06-12 22:12:46,012 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:46,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:12:46,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:46,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:46,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:46,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41945973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:46,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:46,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:12:46,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526191297] [2021-06-12 22:12:46,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:12:46,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:46,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:12:46,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:12:46,097 INFO L87 Difference]: Start difference. First operand 20326 states and 78295 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:46,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:46,988 INFO L93 Difference]: Finished difference Result 29955 states and 110977 transitions. [2021-06-12 22:12:46,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:12:46,989 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:12:46,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:47,051 INFO L225 Difference]: With dead ends: 29955 [2021-06-12 22:12:47,051 INFO L226 Difference]: Without dead ends: 29951 [2021-06-12 22:12:47,051 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 398.8ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:12:47,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29951 states. [2021-06-12 22:12:47,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29951 to 20218. [2021-06-12 22:12:47,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20218 states, 20217 states have (on average 3.854825147153386) internal successors, (77933), 20217 states have internal predecessors, (77933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20218 states to 20218 states and 77933 transitions. [2021-06-12 22:12:47,581 INFO L78 Accepts]: Start accepts. Automaton has 20218 states and 77933 transitions. Word has length 28 [2021-06-12 22:12:47,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:47,581 INFO L482 AbstractCegarLoop]: Abstraction has 20218 states and 77933 transitions. [2021-06-12 22:12:47,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 20218 states and 77933 transitions. [2021-06-12 22:12:47,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:47,613 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:47,613 INFO L472 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] [2021-06-12 22:12:47,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4144 [2021-06-12 22:12:47,829 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:47,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:47,829 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 126 times [2021-06-12 22:12:47,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:47,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448849394] [2021-06-12 22:12:47,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:47,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:47,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448849394] [2021-06-12 22:12:47,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448849394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:47,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102489290] [2021-06-12 22:12:47,855 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:47,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:12:47,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:47,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:12:47,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 22:12:47,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102489290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:47,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:47,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-12 22:12:47,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530720113] [2021-06-12 22:12:47,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:12:47,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:47,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:12:47,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:47,926 INFO L87 Difference]: Start difference. First operand 20218 states and 77933 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) [2021-06-12 22:12:48,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:48,137 INFO L93 Difference]: Finished difference Result 25214 states and 93817 transitions. [2021-06-12 22:12:48,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:12:48,137 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 28 [2021-06-12 22:12:48,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:48,192 INFO L225 Difference]: With dead ends: 25214 [2021-06-12 22:12:48,192 INFO L226 Difference]: Without dead ends: 25214 [2021-06-12 22:12:48,192 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:12:48,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25214 states. [2021-06-12 22:12:48,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25214 to 20528. [2021-06-12 22:12:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20528 states, 20527 states have (on average 3.8459589808544843) internal successors, (78946), 20527 states have internal predecessors, (78946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20528 states to 20528 states and 78946 transitions. [2021-06-12 22:12:48,701 INFO L78 Accepts]: Start accepts. Automaton has 20528 states and 78946 transitions. Word has length 28 [2021-06-12 22:12:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:48,701 INFO L482 AbstractCegarLoop]: Abstraction has 20528 states and 78946 transitions. [2021-06-12 22:12:48,701 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) [2021-06-12 22:12:48,701 INFO L276 IsEmpty]: Start isEmpty. Operand 20528 states and 78946 transitions. [2021-06-12 22:12:48,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:48,734 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:48,734 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:48,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4145 [2021-06-12 22:12:48,934 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:48,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:48,935 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 127 times [2021-06-12 22:12:48,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:48,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015225739] [2021-06-12 22:12:48,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:48,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:48,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015225739] [2021-06-12 22:12:48,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015225739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:48,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653589134] [2021-06-12 22:12:48,971 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:48,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:48,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:12:49,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653589134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:49,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:49,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:12:49,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892176732] [2021-06-12 22:12:49,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:12:49,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:49,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:12:49,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:12:49,066 INFO L87 Difference]: Start difference. First operand 20528 states and 78946 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:50,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:50,014 INFO L93 Difference]: Finished difference Result 30964 states and 113417 transitions. [2021-06-12 22:12:50,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:12:50,014 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:12:50,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:50,218 INFO L225 Difference]: With dead ends: 30964 [2021-06-12 22:12:50,218 INFO L226 Difference]: Without dead ends: 30964 [2021-06-12 22:12:50,218 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 451.3ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:12:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30964 states. [2021-06-12 22:12:50,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30964 to 22146. [2021-06-12 22:12:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22146 states, 22145 states have (on average 3.8581169564235718) internal successors, (85438), 22145 states have internal predecessors, (85438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22146 states to 22146 states and 85438 transitions. [2021-06-12 22:12:50,699 INFO L78 Accepts]: Start accepts. Automaton has 22146 states and 85438 transitions. Word has length 28 [2021-06-12 22:12:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:50,699 INFO L482 AbstractCegarLoop]: Abstraction has 22146 states and 85438 transitions. [2021-06-12 22:12:50,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:50,699 INFO L276 IsEmpty]: Start isEmpty. Operand 22146 states and 85438 transitions. [2021-06-12 22:12:50,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:50,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:50,731 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:50,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4146,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:50,931 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:50,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:50,931 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 128 times [2021-06-12 22:12:50,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:50,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126321331] [2021-06-12 22:12:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:51,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:51,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126321331] [2021-06-12 22:12:51,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126321331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:51,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109871051] [2021-06-12 22:12:51,062 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:51,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:51,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:51,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:51,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:12:51,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109871051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:51,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:51,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:12:51,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287082204] [2021-06-12 22:12:51,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:12:51,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:51,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:12:51,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:12:51,162 INFO L87 Difference]: Start difference. First operand 22146 states and 85438 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:51,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:51,988 INFO L93 Difference]: Finished difference Result 29203 states and 108883 transitions. [2021-06-12 22:12:51,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:12:51,988 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:12:51,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:52,054 INFO L225 Difference]: With dead ends: 29203 [2021-06-12 22:12:52,054 INFO L226 Difference]: Without dead ends: 29191 [2021-06-12 22:12:52,054 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 356.9ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:12:52,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29191 states. [2021-06-12 22:12:52,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29191 to 22298. [2021-06-12 22:12:52,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22298 states, 22297 states have (on average 3.8527156119657353) internal successors, (85904), 22297 states have internal predecessors, (85904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22298 states to 22298 states and 85904 transitions. [2021-06-12 22:12:52,564 INFO L78 Accepts]: Start accepts. Automaton has 22298 states and 85904 transitions. Word has length 28 [2021-06-12 22:12:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:52,564 INFO L482 AbstractCegarLoop]: Abstraction has 22298 states and 85904 transitions. [2021-06-12 22:12:52,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 22298 states and 85904 transitions. [2021-06-12 22:12:52,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:52,597 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:52,597 INFO L472 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] [2021-06-12 22:12:52,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4147,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:52,797 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:52,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:52,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 129 times [2021-06-12 22:12:52,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:52,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244492608] [2021-06-12 22:12:52,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:52,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:52,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244492608] [2021-06-12 22:12:52,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244492608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:52,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410537522] [2021-06-12 22:12:52,823 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:52,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:12:52,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:52,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:12:52,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:53,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410537522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:53,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:53,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 22:12:53,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322319512] [2021-06-12 22:12:53,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:12:53,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:53,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:12:53,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:53,001 INFO L87 Difference]: Start difference. First operand 22298 states and 85904 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) [2021-06-12 22:12:53,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:53,221 INFO L93 Difference]: Finished difference Result 25557 states and 96861 transitions. [2021-06-12 22:12:53,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:12:53,221 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 28 [2021-06-12 22:12:53,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:53,280 INFO L225 Difference]: With dead ends: 25557 [2021-06-12 22:12:53,280 INFO L226 Difference]: Without dead ends: 25557 [2021-06-12 22:12:53,280 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:12:53,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25557 states. [2021-06-12 22:12:53,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25557 to 23101. [2021-06-12 22:12:53,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23101 states, 23100 states have (on average 3.847748917748918) internal successors, (88883), 23100 states have internal predecessors, (88883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:53,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23101 states to 23101 states and 88883 transitions. [2021-06-12 22:12:53,854 INFO L78 Accepts]: Start accepts. Automaton has 23101 states and 88883 transitions. Word has length 28 [2021-06-12 22:12:53,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:53,854 INFO L482 AbstractCegarLoop]: Abstraction has 23101 states and 88883 transitions. [2021-06-12 22:12:53,854 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) [2021-06-12 22:12:53,854 INFO L276 IsEmpty]: Start isEmpty. Operand 23101 states and 88883 transitions. [2021-06-12 22:12:53,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:53,976 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:53,976 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:54,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4148 [2021-06-12 22:12:54,177 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:54,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:54,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 130 times [2021-06-12 22:12:54,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:54,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182319740] [2021-06-12 22:12:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:54,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:54,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182319740] [2021-06-12 22:12:54,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182319740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:54,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433049775] [2021-06-12 22:12:54,211 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:54,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:12:54,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:54,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:54,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:54,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433049775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:54,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:54,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:12:54,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751547897] [2021-06-12 22:12:54,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:12:54,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:54,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:12:54,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:12:54,290 INFO L87 Difference]: Start difference. First operand 23101 states and 88883 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:55,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:55,048 INFO L93 Difference]: Finished difference Result 30944 states and 114247 transitions. [2021-06-12 22:12:55,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:12:55,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-12 22:12:55,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:55,112 INFO L225 Difference]: With dead ends: 30944 [2021-06-12 22:12:55,112 INFO L226 Difference]: Without dead ends: 30944 [2021-06-12 22:12:55,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 369.5ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:12:55,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30944 states. [2021-06-12 22:12:55,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30944 to 24307. [2021-06-12 22:12:55,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24307 states, 24306 states have (on average 3.8156010861515677) internal successors, (92742), 24306 states have internal predecessors, (92742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:55,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24307 states to 24307 states and 92742 transitions. [2021-06-12 22:12:55,626 INFO L78 Accepts]: Start accepts. Automaton has 24307 states and 92742 transitions. Word has length 28 [2021-06-12 22:12:55,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:55,626 INFO L482 AbstractCegarLoop]: Abstraction has 24307 states and 92742 transitions. [2021-06-12 22:12:55,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:55,626 INFO L276 IsEmpty]: Start isEmpty. Operand 24307 states and 92742 transitions. [2021-06-12 22:12:55,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:55,664 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:55,664 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:55,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4149,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:55,865 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:55,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:55,865 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 131 times [2021-06-12 22:12:55,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:55,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214064118] [2021-06-12 22:12:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:55,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:55,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214064118] [2021-06-12 22:12:55,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214064118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:55,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702042409] [2021-06-12 22:12:55,894 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:55,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:12:55,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:55,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:55,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:55,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:55,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702042409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:55,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:55,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:12:55,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937876344] [2021-06-12 22:12:55,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:12:55,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:55,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:12:55,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:12:55,969 INFO L87 Difference]: Start difference. First operand 24307 states and 92742 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:56,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:56,610 INFO L93 Difference]: Finished difference Result 30042 states and 111856 transitions. [2021-06-12 22:12:56,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:12:56,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-12 22:12:56,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:56,684 INFO L225 Difference]: With dead ends: 30042 [2021-06-12 22:12:56,684 INFO L226 Difference]: Without dead ends: 30034 [2021-06-12 22:12:56,684 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:12:56,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30034 states. [2021-06-12 22:12:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30034 to 24129. [2021-06-12 22:12:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24129 states, 24128 states have (on average 3.821742374005305) internal successors, (92211), 24128 states have internal predecessors, (92211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24129 states to 24129 states and 92211 transitions. [2021-06-12 22:12:57,415 INFO L78 Accepts]: Start accepts. Automaton has 24129 states and 92211 transitions. Word has length 28 [2021-06-12 22:12:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:57,415 INFO L482 AbstractCegarLoop]: Abstraction has 24129 states and 92211 transitions. [2021-06-12 22:12:57,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 24129 states and 92211 transitions. [2021-06-12 22:12:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:57,448 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:57,448 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:57,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4150 [2021-06-12 22:12:57,649 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:57,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:57,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 132 times [2021-06-12 22:12:57,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:57,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667301545] [2021-06-12 22:12:57,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:57,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:57,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667301545] [2021-06-12 22:12:57,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667301545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:57,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369651471] [2021-06-12 22:12:57,678 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:57,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:12:57,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:57,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:12:57,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:57,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:57,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369651471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:57,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:57,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:12:57,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802882232] [2021-06-12 22:12:57,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:12:57,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:57,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:12:57,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:12:57,757 INFO L87 Difference]: Start difference. First operand 24129 states and 92211 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:58,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:58,504 INFO L93 Difference]: Finished difference Result 31875 states and 117476 transitions. [2021-06-12 22:12:58,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:12:58,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-12 22:12:58,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:58,574 INFO L225 Difference]: With dead ends: 31875 [2021-06-12 22:12:58,574 INFO L226 Difference]: Without dead ends: 31875 [2021-06-12 22:12:58,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 430.2ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 22:12:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31875 states. [2021-06-12 22:12:59,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31875 to 25163. [2021-06-12 22:12:59,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25163 states, 25162 states have (on average 3.797631348859391) internal successors, (95556), 25162 states have internal predecessors, (95556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25163 states to 25163 states and 95556 transitions. [2021-06-12 22:12:59,168 INFO L78 Accepts]: Start accepts. Automaton has 25163 states and 95556 transitions. Word has length 28 [2021-06-12 22:12:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:59,168 INFO L482 AbstractCegarLoop]: Abstraction has 25163 states and 95556 transitions. [2021-06-12 22:12:59,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:59,169 INFO L276 IsEmpty]: Start isEmpty. Operand 25163 states and 95556 transitions. [2021-06-12 22:12:59,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:59,204 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:59,204 INFO L472 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] [2021-06-12 22:12:59,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4151 [2021-06-12 22:12:59,404 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:59,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:59,404 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 133 times [2021-06-12 22:12:59,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:59,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946755885] [2021-06-12 22:12:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:59,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:59,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946755885] [2021-06-12 22:12:59,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946755885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:59,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664667027] [2021-06-12 22:12:59,434 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:59,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:12:59,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:59,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664667027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:59,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:59,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 22:12:59,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083439554] [2021-06-12 22:12:59,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:12:59,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:59,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:12:59,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:12:59,617 INFO L87 Difference]: Start difference. First operand 25163 states and 95556 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:59,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:59,975 INFO L93 Difference]: Finished difference Result 30826 states and 116166 transitions. [2021-06-12 22:12:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:12:59,975 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-06-12 22:12:59,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:00,063 INFO L225 Difference]: With dead ends: 30826 [2021-06-12 22:13:00,063 INFO L226 Difference]: Without dead ends: 30813 [2021-06-12 22:13:00,064 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:13:00,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30813 states. [2021-06-12 22:13:00,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30813 to 29259. [2021-06-12 22:13:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29259 states, 29258 states have (on average 3.81594777496753) internal successors, (111647), 29258 states have internal predecessors, (111647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29259 states to 29259 states and 111647 transitions. [2021-06-12 22:13:00,821 INFO L78 Accepts]: Start accepts. Automaton has 29259 states and 111647 transitions. Word has length 28 [2021-06-12 22:13:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:00,822 INFO L482 AbstractCegarLoop]: Abstraction has 29259 states and 111647 transitions. [2021-06-12 22:13:00,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 29259 states and 111647 transitions. [2021-06-12 22:13:00,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:00,870 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:00,870 INFO L472 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] [2021-06-12 22:13:01,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4152,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:01,070 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:01,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:01,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 134 times [2021-06-12 22:13:01,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:01,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973135988] [2021-06-12 22:13:01,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:01,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:01,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973135988] [2021-06-12 22:13:01,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973135988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:01,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586103004] [2021-06-12 22:13:01,106 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:01,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:01,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:01,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:01,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:01,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586103004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:01,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:01,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 22:13:01,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256570656] [2021-06-12 22:13:01,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:13:01,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:01,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:13:01,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:13:01,177 INFO L87 Difference]: Start difference. First operand 29259 states and 111647 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:01,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:01,530 INFO L93 Difference]: Finished difference Result 32262 states and 120978 transitions. [2021-06-12 22:13:01,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:13:01,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-06-12 22:13:01,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:01,735 INFO L225 Difference]: With dead ends: 32262 [2021-06-12 22:13:01,735 INFO L226 Difference]: Without dead ends: 32262 [2021-06-12 22:13:01,735 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:13:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32262 states. [2021-06-12 22:13:02,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32262 to 29004. [2021-06-12 22:13:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29004 states, 29003 states have (on average 3.8122952797986414) internal successors, (110568), 29003 states have internal predecessors, (110568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:02,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29004 states to 29004 states and 110568 transitions. [2021-06-12 22:13:02,372 INFO L78 Accepts]: Start accepts. Automaton has 29004 states and 110568 transitions. Word has length 28 [2021-06-12 22:13:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:02,372 INFO L482 AbstractCegarLoop]: Abstraction has 29004 states and 110568 transitions. [2021-06-12 22:13:02,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:02,373 INFO L276 IsEmpty]: Start isEmpty. Operand 29004 states and 110568 transitions. [2021-06-12 22:13:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:02,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:02,422 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:02,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4153 [2021-06-12 22:13:02,622 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:02,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:02,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 135 times [2021-06-12 22:13:02,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:02,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047419711] [2021-06-12 22:13:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:02,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:02,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047419711] [2021-06-12 22:13:02,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047419711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:02,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330173243] [2021-06-12 22:13:02,653 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:02,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:13:02,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:02,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:02,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:02,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330173243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:02,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:02,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:13:02,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111553622] [2021-06-12 22:13:02,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:13:02,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:02,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:13:02,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:13:02,751 INFO L87 Difference]: Start difference. First operand 29004 states and 110568 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:03,468 INFO L93 Difference]: Finished difference Result 35430 states and 131896 transitions. [2021-06-12 22:13:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:13:03,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-12 22:13:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:03,545 INFO L225 Difference]: With dead ends: 35430 [2021-06-12 22:13:03,545 INFO L226 Difference]: Without dead ends: 35422 [2021-06-12 22:13:03,545 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 280.9ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:13:03,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35422 states. [2021-06-12 22:13:04,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35422 to 28970. [2021-06-12 22:13:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28970 states, 28969 states have (on average 3.8127308502191997) internal successors, (110451), 28969 states have internal predecessors, (110451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28970 states to 28970 states and 110451 transitions. [2021-06-12 22:13:04,232 INFO L78 Accepts]: Start accepts. Automaton has 28970 states and 110451 transitions. Word has length 28 [2021-06-12 22:13:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:04,232 INFO L482 AbstractCegarLoop]: Abstraction has 28970 states and 110451 transitions. [2021-06-12 22:13:04,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 28970 states and 110451 transitions. [2021-06-12 22:13:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:04,277 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:04,277 INFO L472 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] [2021-06-12 22:13:04,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4154,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:04,477 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:04,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:04,478 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 136 times [2021-06-12 22:13:04,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:04,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274218014] [2021-06-12 22:13:04,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:13:04,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:04,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274218014] [2021-06-12 22:13:04,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274218014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:04,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413023541] [2021-06-12 22:13:04,508 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:04,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:04,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:04,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:13:04,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413023541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:04,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:04,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 22:13:04,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689866446] [2021-06-12 22:13:04,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:13:04,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:04,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:13:04,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:13:04,704 INFO L87 Difference]: Start difference. First operand 28970 states and 110451 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:05,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:05,101 INFO L93 Difference]: Finished difference Result 31816 states and 119913 transitions. [2021-06-12 22:13:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:13:05,101 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-06-12 22:13:05,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:05,167 INFO L225 Difference]: With dead ends: 31816 [2021-06-12 22:13:05,167 INFO L226 Difference]: Without dead ends: 31816 [2021-06-12 22:13:05,167 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:13:05,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31816 states. [2021-06-12 22:13:05,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31816 to 29502. [2021-06-12 22:13:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29502 states, 29501 states have (on average 3.8112267380766753) internal successors, (112435), 29501 states have internal predecessors, (112435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:06,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29502 states to 29502 states and 112435 transitions. [2021-06-12 22:13:06,007 INFO L78 Accepts]: Start accepts. Automaton has 29502 states and 112435 transitions. Word has length 28 [2021-06-12 22:13:06,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:06,007 INFO L482 AbstractCegarLoop]: Abstraction has 29502 states and 112435 transitions. [2021-06-12 22:13:06,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:06,007 INFO L276 IsEmpty]: Start isEmpty. Operand 29502 states and 112435 transitions. [2021-06-12 22:13:06,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:06,055 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:06,055 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:06,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4155 [2021-06-12 22:13:06,255 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:06,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:06,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 137 times [2021-06-12 22:13:06,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:06,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930762236] [2021-06-12 22:13:06,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:13:06,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:06,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930762236] [2021-06-12 22:13:06,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930762236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:06,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703955286] [2021-06-12 22:13:06,295 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:06,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:13:06,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:06,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:06,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:13:06,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703955286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:06,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:06,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:13:06,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992449727] [2021-06-12 22:13:06,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:13:06,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:06,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:13:06,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:13:06,369 INFO L87 Difference]: Start difference. First operand 29502 states and 112435 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:06,936 INFO L93 Difference]: Finished difference Result 36375 states and 135365 transitions. [2021-06-12 22:13:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:13:06,936 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-12 22:13:06,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:07,020 INFO L225 Difference]: With dead ends: 36375 [2021-06-12 22:13:07,020 INFO L226 Difference]: Without dead ends: 36351 [2021-06-12 22:13:07,020 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:13:07,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36351 states. [2021-06-12 22:13:07,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36351 to 29684. [2021-06-12 22:13:07,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29684 states, 29683 states have (on average 3.806960212916484) internal successors, (113002), 29683 states have internal predecessors, (113002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29684 states to 29684 states and 113002 transitions. [2021-06-12 22:13:07,776 INFO L78 Accepts]: Start accepts. Automaton has 29684 states and 113002 transitions. Word has length 28 [2021-06-12 22:13:07,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:07,776 INFO L482 AbstractCegarLoop]: Abstraction has 29684 states and 113002 transitions. [2021-06-12 22:13:07,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:07,777 INFO L276 IsEmpty]: Start isEmpty. Operand 29684 states and 113002 transitions. [2021-06-12 22:13:07,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:07,822 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:07,822 INFO L472 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] [2021-06-12 22:13:08,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4156 [2021-06-12 22:13:08,023 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:08,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:08,023 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 138 times [2021-06-12 22:13:08,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:08,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651738494] [2021-06-12 22:13:08,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:08,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:08,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651738494] [2021-06-12 22:13:08,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651738494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:08,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465187281] [2021-06-12 22:13:08,058 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:08,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:13:08,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:08,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:08,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:08,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465187281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:08,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:08,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-12 22:13:08,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817218054] [2021-06-12 22:13:08,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:13:08,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:08,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:13:08,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:13:08,129 INFO L87 Difference]: Start difference. First operand 29684 states and 113002 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:08,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:08,567 INFO L93 Difference]: Finished difference Result 32240 states and 121414 transitions. [2021-06-12 22:13:08,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:13:08,567 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:13:08,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:08,795 INFO L225 Difference]: With dead ends: 32240 [2021-06-12 22:13:08,795 INFO L226 Difference]: Without dead ends: 32240 [2021-06-12 22:13:08,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 199.0ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:13:08,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32240 states. [2021-06-12 22:13:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32240 to 29610. [2021-06-12 22:13:09,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29610 states, 29609 states have (on average 3.8078287007328853) internal successors, (112746), 29609 states have internal predecessors, (112746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:09,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29610 states to 29610 states and 112746 transitions. [2021-06-12 22:13:09,480 INFO L78 Accepts]: Start accepts. Automaton has 29610 states and 112746 transitions. Word has length 28 [2021-06-12 22:13:09,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:09,480 INFO L482 AbstractCegarLoop]: Abstraction has 29610 states and 112746 transitions. [2021-06-12 22:13:09,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:09,480 INFO L276 IsEmpty]: Start isEmpty. Operand 29610 states and 112746 transitions. [2021-06-12 22:13:09,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:09,526 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:09,526 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:09,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4157,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:09,727 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:09,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:09,727 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 139 times [2021-06-12 22:13:09,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:09,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834510381] [2021-06-12 22:13:09,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:09,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:09,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834510381] [2021-06-12 22:13:09,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834510381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:09,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754459866] [2021-06-12 22:13:09,763 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:09,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:09,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:09,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754459866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:09,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:09,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:13:09,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525168175] [2021-06-12 22:13:09,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:09,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:09,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:09,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:09,849 INFO L87 Difference]: Start difference. First operand 29610 states and 112746 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:10,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:10,558 INFO L93 Difference]: Finished difference Result 36298 states and 135106 transitions. [2021-06-12 22:13:10,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:13:10,559 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-12 22:13:10,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:10,642 INFO L225 Difference]: With dead ends: 36298 [2021-06-12 22:13:10,642 INFO L226 Difference]: Without dead ends: 36258 [2021-06-12 22:13:10,642 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:13:10,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36258 states. [2021-06-12 22:13:11,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36258 to 29776. [2021-06-12 22:13:11,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29776 states, 29775 states have (on average 3.803761544920235) internal successors, (113257), 29775 states have internal predecessors, (113257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29776 states to 29776 states and 113257 transitions. [2021-06-12 22:13:11,367 INFO L78 Accepts]: Start accepts. Automaton has 29776 states and 113257 transitions. Word has length 28 [2021-06-12 22:13:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:11,367 INFO L482 AbstractCegarLoop]: Abstraction has 29776 states and 113257 transitions. [2021-06-12 22:13:11,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:11,368 INFO L276 IsEmpty]: Start isEmpty. Operand 29776 states and 113257 transitions. [2021-06-12 22:13:11,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:11,537 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:11,537 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:11,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4158,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:11,750 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:11,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:11,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 140 times [2021-06-12 22:13:11,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:11,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499081565] [2021-06-12 22:13:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:11,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:11,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499081565] [2021-06-12 22:13:11,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499081565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:11,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107472911] [2021-06-12 22:13:11,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:11,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:11,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:11,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:11,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:11,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107472911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:11,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:11,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:13:11,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560881676] [2021-06-12 22:13:11,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:13:11,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:11,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:13:11,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:13:11,907 INFO L87 Difference]: Start difference. First operand 29776 states and 113257 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:13,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:13,202 INFO L93 Difference]: Finished difference Result 68142 states and 250877 transitions. [2021-06-12 22:13:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:13:13,202 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:13:13,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:13,363 INFO L225 Difference]: With dead ends: 68142 [2021-06-12 22:13:13,363 INFO L226 Difference]: Without dead ends: 68142 [2021-06-12 22:13:13,364 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 703.9ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:13:13,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68142 states. [2021-06-12 22:13:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68142 to 37503. [2021-06-12 22:13:14,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37503 states, 37502 states have (on average 3.8855527705189057) internal successors, (145716), 37502 states have internal predecessors, (145716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37503 states to 37503 states and 145716 transitions. [2021-06-12 22:13:14,621 INFO L78 Accepts]: Start accepts. Automaton has 37503 states and 145716 transitions. Word has length 28 [2021-06-12 22:13:14,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:14,621 INFO L482 AbstractCegarLoop]: Abstraction has 37503 states and 145716 transitions. [2021-06-12 22:13:14,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:14,621 INFO L276 IsEmpty]: Start isEmpty. Operand 37503 states and 145716 transitions. [2021-06-12 22:13:14,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:14,679 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:14,679 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:14,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4159,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:14,880 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:14,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 141 times [2021-06-12 22:13:14,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:14,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305788995] [2021-06-12 22:13:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:14,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:14,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305788995] [2021-06-12 22:13:14,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305788995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:14,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585021643] [2021-06-12 22:13:14,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:14,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:13:14,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:14,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:14,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:15,109 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-12 22:13:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:15,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585021643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:15,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:15,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:13:15,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882757745] [2021-06-12 22:13:15,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:13:15,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:15,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:13:15,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:13:15,168 INFO L87 Difference]: Start difference. First operand 37503 states and 145716 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:16,511 INFO L93 Difference]: Finished difference Result 67515 states and 249216 transitions. [2021-06-12 22:13:16,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:13:16,511 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:13:16,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:16,702 INFO L225 Difference]: With dead ends: 67515 [2021-06-12 22:13:16,702 INFO L226 Difference]: Without dead ends: 67515 [2021-06-12 22:13:16,702 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 620.6ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:13:16,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67515 states. [2021-06-12 22:13:17,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67515 to 37500. [2021-06-12 22:13:17,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37500 states, 37499 states have (on average 3.885490279740793) internal successors, (145702), 37499 states have internal predecessors, (145702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:17,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37500 states to 37500 states and 145702 transitions. [2021-06-12 22:13:17,942 INFO L78 Accepts]: Start accepts. Automaton has 37500 states and 145702 transitions. Word has length 28 [2021-06-12 22:13:17,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:17,942 INFO L482 AbstractCegarLoop]: Abstraction has 37500 states and 145702 transitions. [2021-06-12 22:13:17,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:17,942 INFO L276 IsEmpty]: Start isEmpty. Operand 37500 states and 145702 transitions. [2021-06-12 22:13:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:17,998 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:17,998 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:18,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4160 [2021-06-12 22:13:18,198 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:18,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:18,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 142 times [2021-06-12 22:13:18,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:18,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215588838] [2021-06-12 22:13:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:18,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:18,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215588838] [2021-06-12 22:13:18,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215588838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:18,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082520179] [2021-06-12 22:13:18,228 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:18,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:18,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:18,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:18,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:18,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082520179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:18,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:18,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:13:18,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953876083] [2021-06-12 22:13:18,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:13:18,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:18,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:13:18,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:13:18,338 INFO L87 Difference]: Start difference. First operand 37500 states and 145702 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:19,536 INFO L93 Difference]: Finished difference Result 62937 states and 233716 transitions. [2021-06-12 22:13:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:13:19,537 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-12 22:13:19,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:19,700 INFO L225 Difference]: With dead ends: 62937 [2021-06-12 22:13:19,700 INFO L226 Difference]: Without dead ends: 62937 [2021-06-12 22:13:19,700 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 542.1ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:13:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62937 states. [2021-06-12 22:13:20,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62937 to 37524. [2021-06-12 22:13:20,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37524 states, 37523 states have (on average 3.885830024251792) internal successors, (145808), 37523 states have internal predecessors, (145808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:21,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37524 states to 37524 states and 145808 transitions. [2021-06-12 22:13:21,007 INFO L78 Accepts]: Start accepts. Automaton has 37524 states and 145808 transitions. Word has length 28 [2021-06-12 22:13:21,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:21,007 INFO L482 AbstractCegarLoop]: Abstraction has 37524 states and 145808 transitions. [2021-06-12 22:13:21,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:21,007 INFO L276 IsEmpty]: Start isEmpty. Operand 37524 states and 145808 transitions. [2021-06-12 22:13:21,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:21,065 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:21,065 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:21,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4161 [2021-06-12 22:13:21,266 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:21,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:21,266 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 143 times [2021-06-12 22:13:21,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:21,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241462979] [2021-06-12 22:13:21,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:21,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:21,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241462979] [2021-06-12 22:13:21,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241462979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:21,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181886327] [2021-06-12 22:13:21,294 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:21,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:13:21,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:21,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:21,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:21,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181886327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:21,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:21,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:13:21,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320065682] [2021-06-12 22:13:21,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:13:21,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:21,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:13:21,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:13:21,396 INFO L87 Difference]: Start difference. First operand 37524 states and 145808 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:22,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:22,508 INFO L93 Difference]: Finished difference Result 62070 states and 231476 transitions. [2021-06-12 22:13:22,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:13:22,508 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-12 22:13:22,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:22,666 INFO L225 Difference]: With dead ends: 62070 [2021-06-12 22:13:22,666 INFO L226 Difference]: Without dead ends: 62062 [2021-06-12 22:13:22,667 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 444.2ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:13:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62062 states. [2021-06-12 22:13:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62062 to 37524. [2021-06-12 22:13:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37524 states, 37523 states have (on average 3.885670122324974) internal successors, (145802), 37523 states have internal predecessors, (145802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37524 states to 37524 states and 145802 transitions. [2021-06-12 22:13:23,926 INFO L78 Accepts]: Start accepts. Automaton has 37524 states and 145802 transitions. Word has length 28 [2021-06-12 22:13:23,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:23,926 INFO L482 AbstractCegarLoop]: Abstraction has 37524 states and 145802 transitions. [2021-06-12 22:13:23,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:23,926 INFO L276 IsEmpty]: Start isEmpty. Operand 37524 states and 145802 transitions. [2021-06-12 22:13:23,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:23,984 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:23,984 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:24,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4162,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:24,187 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:24,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:24,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 144 times [2021-06-12 22:13:24,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:24,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845106101] [2021-06-12 22:13:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:24,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:24,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845106101] [2021-06-12 22:13:24,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845106101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:24,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568860294] [2021-06-12 22:13:24,216 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:24,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:13:24,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:24,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:24,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:24,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568860294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:24,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:24,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:13:24,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171987297] [2021-06-12 22:13:24,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:13:24,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:24,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:13:24,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:13:24,329 INFO L87 Difference]: Start difference. First operand 37524 states and 145802 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:25,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:25,499 INFO L93 Difference]: Finished difference Result 61748 states and 230607 transitions. [2021-06-12 22:13:25,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:13:25,500 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:13:25,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:25,669 INFO L225 Difference]: With dead ends: 61748 [2021-06-12 22:13:25,669 INFO L226 Difference]: Without dead ends: 61748 [2021-06-12 22:13:25,669 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 512.3ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:13:25,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61748 states. [2021-06-12 22:13:26,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61748 to 37532. [2021-06-12 22:13:26,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37532 states, 37531 states have (on average 3.8857477818336843) internal successors, (145836), 37531 states have internal predecessors, (145836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:26,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37532 states to 37532 states and 145836 transitions. [2021-06-12 22:13:26,941 INFO L78 Accepts]: Start accepts. Automaton has 37532 states and 145836 transitions. Word has length 28 [2021-06-12 22:13:26,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:26,941 INFO L482 AbstractCegarLoop]: Abstraction has 37532 states and 145836 transitions. [2021-06-12 22:13:26,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:26,941 INFO L276 IsEmpty]: Start isEmpty. Operand 37532 states and 145836 transitions. [2021-06-12 22:13:26,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:26,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:26,999 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:27,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4163 [2021-06-12 22:13:27,200 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:27,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:27,200 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 145 times [2021-06-12 22:13:27,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:27,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314533270] [2021-06-12 22:13:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:27,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:27,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314533270] [2021-06-12 22:13:27,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314533270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:27,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758154867] [2021-06-12 22:13:27,229 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:27,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:27,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:27,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758154867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:27,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:27,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:13:27,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476765452] [2021-06-12 22:13:27,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:13:27,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:27,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:13:27,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:13:27,336 INFO L87 Difference]: Start difference. First operand 37532 states and 145836 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:28,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:28,440 INFO L93 Difference]: Finished difference Result 61537 states and 230081 transitions. [2021-06-12 22:13:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:13:28,441 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:13:28,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:28,604 INFO L225 Difference]: With dead ends: 61537 [2021-06-12 22:13:28,604 INFO L226 Difference]: Without dead ends: 61529 [2021-06-12 22:13:28,604 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 446.1ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:13:28,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61529 states. [2021-06-12 22:13:29,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61529 to 37532. [2021-06-12 22:13:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37532 states, 37531 states have (on average 3.885694492552823) internal successors, (145834), 37531 states have internal predecessors, (145834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:29,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37532 states to 37532 states and 145834 transitions. [2021-06-12 22:13:29,883 INFO L78 Accepts]: Start accepts. Automaton has 37532 states and 145834 transitions. Word has length 28 [2021-06-12 22:13:29,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:29,883 INFO L482 AbstractCegarLoop]: Abstraction has 37532 states and 145834 transitions. [2021-06-12 22:13:29,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:29,883 INFO L276 IsEmpty]: Start isEmpty. Operand 37532 states and 145834 transitions. [2021-06-12 22:13:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:29,940 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:29,940 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:30,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4164,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:30,140 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:30,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:30,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 146 times [2021-06-12 22:13:30,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:30,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031738652] [2021-06-12 22:13:30,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:30,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:30,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031738652] [2021-06-12 22:13:30,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031738652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:30,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619412615] [2021-06-12 22:13:30,171 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:30,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:30,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:30,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:30,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:30,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619412615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:30,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:30,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:13:30,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507984169] [2021-06-12 22:13:30,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:13:30,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:30,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:13:30,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:13:30,269 INFO L87 Difference]: Start difference. First operand 37532 states and 145834 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:31,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:31,516 INFO L93 Difference]: Finished difference Result 60940 states and 226561 transitions. [2021-06-12 22:13:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:13:31,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:13:31,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:31,677 INFO L225 Difference]: With dead ends: 60940 [2021-06-12 22:13:31,677 INFO L226 Difference]: Without dead ends: 60940 [2021-06-12 22:13:31,677 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 551.1ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:13:31,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60940 states. [2021-06-12 22:13:32,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60940 to 40347. [2021-06-12 22:13:32,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40347 states, 40346 states have (on average 3.8897040598820207) internal successors, (156934), 40346 states have internal predecessors, (156934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:33,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40347 states to 40347 states and 156934 transitions. [2021-06-12 22:13:33,053 INFO L78 Accepts]: Start accepts. Automaton has 40347 states and 156934 transitions. Word has length 28 [2021-06-12 22:13:33,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:33,053 INFO L482 AbstractCegarLoop]: Abstraction has 40347 states and 156934 transitions. [2021-06-12 22:13:33,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:33,053 INFO L276 IsEmpty]: Start isEmpty. Operand 40347 states and 156934 transitions. [2021-06-12 22:13:33,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:33,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:33,115 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:33,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4165 [2021-06-12 22:13:33,315 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:33,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:33,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 147 times [2021-06-12 22:13:33,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:33,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325908293] [2021-06-12 22:13:33,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:33,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:33,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325908293] [2021-06-12 22:13:33,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325908293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:33,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981153300] [2021-06-12 22:13:33,345 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:33,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:13:33,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:33,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:33,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:33,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981153300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:33,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:33,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:13:33,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632530210] [2021-06-12 22:13:33,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:13:33,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:33,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:13:33,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:13:33,436 INFO L87 Difference]: Start difference. First operand 40347 states and 156934 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:34,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:34,473 INFO L93 Difference]: Finished difference Result 60463 states and 225303 transitions. [2021-06-12 22:13:34,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:13:34,473 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:13:34,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:34,630 INFO L225 Difference]: With dead ends: 60463 [2021-06-12 22:13:34,630 INFO L226 Difference]: Without dead ends: 60455 [2021-06-12 22:13:34,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 435.3ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:13:34,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60455 states. [2021-06-12 22:13:35,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60455 to 40063. [2021-06-12 22:13:35,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40063 states, 40062 states have (on average 3.8951125755079627) internal successors, (156046), 40062 states have internal predecessors, (156046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:35,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40063 states to 40063 states and 156046 transitions. [2021-06-12 22:13:35,942 INFO L78 Accepts]: Start accepts. Automaton has 40063 states and 156046 transitions. Word has length 28 [2021-06-12 22:13:35,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:35,942 INFO L482 AbstractCegarLoop]: Abstraction has 40063 states and 156046 transitions. [2021-06-12 22:13:35,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:35,942 INFO L276 IsEmpty]: Start isEmpty. Operand 40063 states and 156046 transitions. [2021-06-12 22:13:36,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:36,004 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:36,004 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:36,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4166 [2021-06-12 22:13:36,205 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:36,205 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 148 times [2021-06-12 22:13:36,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:36,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510882417] [2021-06-12 22:13:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:36,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:36,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510882417] [2021-06-12 22:13:36,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510882417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:36,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829695203] [2021-06-12 22:13:36,235 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:36,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:36,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:36,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:36,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:36,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829695203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:36,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:36,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:13:36,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311671798] [2021-06-12 22:13:36,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:13:36,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:36,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:13:36,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:13:36,325 INFO L87 Difference]: Start difference. First operand 40063 states and 156046 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:37,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:37,231 INFO L93 Difference]: Finished difference Result 59012 states and 221313 transitions. [2021-06-12 22:13:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:13:37,232 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:13:37,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:37,393 INFO L225 Difference]: With dead ends: 59012 [2021-06-12 22:13:37,394 INFO L226 Difference]: Without dead ends: 58988 [2021-06-12 22:13:37,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:13:37,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58988 states. [2021-06-12 22:13:38,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58988 to 39973. [2021-06-12 22:13:38,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39973 states, 39972 states have (on average 3.8949514660262183) internal successors, (155689), 39972 states have internal predecessors, (155689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39973 states to 39973 states and 155689 transitions. [2021-06-12 22:13:38,683 INFO L78 Accepts]: Start accepts. Automaton has 39973 states and 155689 transitions. Word has length 28 [2021-06-12 22:13:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:38,683 INFO L482 AbstractCegarLoop]: Abstraction has 39973 states and 155689 transitions. [2021-06-12 22:13:38,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 39973 states and 155689 transitions. [2021-06-12 22:13:38,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:38,743 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:38,744 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:38,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4167 [2021-06-12 22:13:38,944 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:38,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:38,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 149 times [2021-06-12 22:13:38,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:38,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937845010] [2021-06-12 22:13:38,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:13:38,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:38,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937845010] [2021-06-12 22:13:38,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937845010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:38,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496533457] [2021-06-12 22:13:38,983 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:39,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:13:39,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:39,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:39,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:39,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496533457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:39,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:39,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:13:39,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704560280] [2021-06-12 22:13:39,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:13:39,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:39,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:13:39,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:13:39,101 INFO L87 Difference]: Start difference. First operand 39973 states and 155689 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:40,285 INFO L93 Difference]: Finished difference Result 60251 states and 224712 transitions. [2021-06-12 22:13:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 22:13:40,286 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:13:40,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:40,445 INFO L225 Difference]: With dead ends: 60251 [2021-06-12 22:13:40,445 INFO L226 Difference]: Without dead ends: 60251 [2021-06-12 22:13:40,445 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 550.7ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 22:13:40,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60251 states. [2021-06-12 22:13:41,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60251 to 40069. [2021-06-12 22:13:41,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40069 states, 40068 states have (on average 3.8934561245882002) internal successors, (156003), 40068 states have internal predecessors, (156003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40069 states to 40069 states and 156003 transitions. [2021-06-12 22:13:41,727 INFO L78 Accepts]: Start accepts. Automaton has 40069 states and 156003 transitions. Word has length 28 [2021-06-12 22:13:41,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:41,727 INFO L482 AbstractCegarLoop]: Abstraction has 40069 states and 156003 transitions. [2021-06-12 22:13:41,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:41,727 INFO L276 IsEmpty]: Start isEmpty. Operand 40069 states and 156003 transitions. [2021-06-12 22:13:41,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:41,787 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:41,787 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:41,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4168,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:41,987 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:41,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:41,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 150 times [2021-06-12 22:13:41,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:41,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601467459] [2021-06-12 22:13:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:13:42,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:42,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601467459] [2021-06-12 22:13:42,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601467459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:42,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047750412] [2021-06-12 22:13:42,018 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:42,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:13:42,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:42,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:42,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:42,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047750412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:42,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:42,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:13:42,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778742223] [2021-06-12 22:13:42,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:13:42,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:42,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:13:42,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:13:42,125 INFO L87 Difference]: Start difference. First operand 40069 states and 156003 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:43,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:43,177 INFO L93 Difference]: Finished difference Result 59938 states and 223824 transitions. [2021-06-12 22:13:43,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:13:43,177 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:13:43,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:43,335 INFO L225 Difference]: With dead ends: 59938 [2021-06-12 22:13:43,335 INFO L226 Difference]: Without dead ends: 59930 [2021-06-12 22:13:43,335 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 440.9ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:13:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59930 states. [2021-06-12 22:13:44,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59930 to 40001. [2021-06-12 22:13:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40001 states, 40000 states have (on average 3.894775) internal successors, (155791), 40000 states have internal predecessors, (155791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:44,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40001 states to 40001 states and 155791 transitions. [2021-06-12 22:13:44,540 INFO L78 Accepts]: Start accepts. Automaton has 40001 states and 155791 transitions. Word has length 28 [2021-06-12 22:13:44,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:44,540 INFO L482 AbstractCegarLoop]: Abstraction has 40001 states and 155791 transitions. [2021-06-12 22:13:44,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:44,540 INFO L276 IsEmpty]: Start isEmpty. Operand 40001 states and 155791 transitions. [2021-06-12 22:13:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:44,602 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:44,602 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:44,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4169,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:44,802 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:44,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:44,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 151 times [2021-06-12 22:13:44,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:44,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993109794] [2021-06-12 22:13:44,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:13:44,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:44,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993109794] [2021-06-12 22:13:44,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993109794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:44,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561598889] [2021-06-12 22:13:44,833 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:44,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:44,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:44,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561598889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:44,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:44,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:13:44,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137677161] [2021-06-12 22:13:44,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:13:44,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:44,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:13:44,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:13:44,931 INFO L87 Difference]: Start difference. First operand 40001 states and 155791 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:45,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:45,837 INFO L93 Difference]: Finished difference Result 58669 states and 220313 transitions. [2021-06-12 22:13:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:13:45,837 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-12 22:13:45,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:45,992 INFO L225 Difference]: With dead ends: 58669 [2021-06-12 22:13:45,992 INFO L226 Difference]: Without dead ends: 58645 [2021-06-12 22:13:45,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 321.0ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:13:46,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58645 states. [2021-06-12 22:13:47,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58645 to 39977. [2021-06-12 22:13:47,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39977 states, 39976 states have (on average 3.894911947168301) internal successors, (155703), 39976 states have internal predecessors, (155703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39977 states to 39977 states and 155703 transitions. [2021-06-12 22:13:47,257 INFO L78 Accepts]: Start accepts. Automaton has 39977 states and 155703 transitions. Word has length 28 [2021-06-12 22:13:47,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:47,257 INFO L482 AbstractCegarLoop]: Abstraction has 39977 states and 155703 transitions. [2021-06-12 22:13:47,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 39977 states and 155703 transitions. [2021-06-12 22:13:47,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:47,317 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:47,317 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:47,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4170 [2021-06-12 22:13:47,518 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:47,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:47,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 152 times [2021-06-12 22:13:47,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:47,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623020098] [2021-06-12 22:13:47,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:47,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:47,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623020098] [2021-06-12 22:13:47,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623020098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:47,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334074567] [2021-06-12 22:13:47,552 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:47,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:47,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:47,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:47,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:47,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334074567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:47,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:47,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:13:47,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87888531] [2021-06-12 22:13:47,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:13:47,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:47,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:13:47,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:13:47,641 INFO L87 Difference]: Start difference. First operand 39977 states and 155703 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:49,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:49,308 INFO L93 Difference]: Finished difference Result 61863 states and 229407 transitions. [2021-06-12 22:13:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-12 22:13:49,308 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:13:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:49,465 INFO L225 Difference]: With dead ends: 61863 [2021-06-12 22:13:49,465 INFO L226 Difference]: Without dead ends: 61863 [2021-06-12 22:13:49,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 915.1ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 22:13:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61863 states. [2021-06-12 22:13:50,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61863 to 44335. [2021-06-12 22:13:50,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44335 states, 44334 states have (on average 3.8447692515902014) internal successors, (170454), 44334 states have internal predecessors, (170454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:50,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44335 states to 44335 states and 170454 transitions. [2021-06-12 22:13:50,785 INFO L78 Accepts]: Start accepts. Automaton has 44335 states and 170454 transitions. Word has length 28 [2021-06-12 22:13:50,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:50,785 INFO L482 AbstractCegarLoop]: Abstraction has 44335 states and 170454 transitions. [2021-06-12 22:13:50,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:50,785 INFO L276 IsEmpty]: Start isEmpty. Operand 44335 states and 170454 transitions. [2021-06-12 22:13:50,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:50,856 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:50,856 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:51,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4171 [2021-06-12 22:13:51,071 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:51,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:51,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 153 times [2021-06-12 22:13:51,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:51,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646200784] [2021-06-12 22:13:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:51,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:51,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646200784] [2021-06-12 22:13:51,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646200784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:51,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204951166] [2021-06-12 22:13:51,106 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:51,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:13:51,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:51,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:51,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:51,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204951166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:51,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:51,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:13:51,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720671114] [2021-06-12 22:13:51,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:13:51,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:51,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:13:51,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:13:51,194 INFO L87 Difference]: Start difference. First operand 44335 states and 170454 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:52,557 INFO L93 Difference]: Finished difference Result 61094 states and 227301 transitions. [2021-06-12 22:13:52,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:13:52,558 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:13:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:52,721 INFO L225 Difference]: With dead ends: 61094 [2021-06-12 22:13:52,721 INFO L226 Difference]: Without dead ends: 61086 [2021-06-12 22:13:52,722 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 789.1ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 22:13:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61086 states. [2021-06-12 22:13:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61086 to 43181. [2021-06-12 22:13:53,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43181 states, 43180 states have (on average 3.8640805928670683) internal successors, (166851), 43180 states have internal predecessors, (166851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43181 states to 43181 states and 166851 transitions. [2021-06-12 22:13:54,126 INFO L78 Accepts]: Start accepts. Automaton has 43181 states and 166851 transitions. Word has length 28 [2021-06-12 22:13:54,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:54,126 INFO L482 AbstractCegarLoop]: Abstraction has 43181 states and 166851 transitions. [2021-06-12 22:13:54,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:54,126 INFO L276 IsEmpty]: Start isEmpty. Operand 43181 states and 166851 transitions. [2021-06-12 22:13:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:54,191 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:54,191 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:54,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4172 [2021-06-12 22:13:54,392 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:54,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:54,392 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 154 times [2021-06-12 22:13:54,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:54,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938424335] [2021-06-12 22:13:54,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:54,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:54,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938424335] [2021-06-12 22:13:54,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938424335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:54,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572284356] [2021-06-12 22:13:54,427 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:54,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:54,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:54,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:54,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:54,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572284356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:54,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:54,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:13:54,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070681529] [2021-06-12 22:13:54,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:13:54,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:54,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:13:54,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:13:54,509 INFO L87 Difference]: Start difference. First operand 43181 states and 166851 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:55,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:55,650 INFO L93 Difference]: Finished difference Result 59433 states and 222664 transitions. [2021-06-12 22:13:55,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:13:55,651 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:13:55,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:55,807 INFO L225 Difference]: With dead ends: 59433 [2021-06-12 22:13:55,807 INFO L226 Difference]: Without dead ends: 59409 [2021-06-12 22:13:55,808 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 674.1ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:13:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59409 states. [2021-06-12 22:13:56,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59409 to 43201. [2021-06-12 22:13:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43201 states, 43200 states have (on average 3.861782407407407) internal successors, (166829), 43200 states have internal predecessors, (166829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43201 states to 43201 states and 166829 transitions. [2021-06-12 22:13:57,103 INFO L78 Accepts]: Start accepts. Automaton has 43201 states and 166829 transitions. Word has length 28 [2021-06-12 22:13:57,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:57,103 INFO L482 AbstractCegarLoop]: Abstraction has 43201 states and 166829 transitions. [2021-06-12 22:13:57,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:57,103 INFO L276 IsEmpty]: Start isEmpty. Operand 43201 states and 166829 transitions. [2021-06-12 22:13:57,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:13:57,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:57,168 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:57,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4173 [2021-06-12 22:13:57,369 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:57,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:57,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 155 times [2021-06-12 22:13:57,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:57,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700537690] [2021-06-12 22:13:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:57,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:57,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700537690] [2021-06-12 22:13:57,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700537690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:57,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313443673] [2021-06-12 22:13:57,565 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:57,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:13:57,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:57,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:13:57,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:57,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313443673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:57,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:57,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:13:57,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367638016] [2021-06-12 22:13:57,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:13:57,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:57,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:13:57,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:13:57,655 INFO L87 Difference]: Start difference. First operand 43201 states and 166829 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:58,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:58,873 INFO L93 Difference]: Finished difference Result 60686 states and 226187 transitions. [2021-06-12 22:13:58,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:13:58,873 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:13:58,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:59,059 INFO L225 Difference]: With dead ends: 60686 [2021-06-12 22:13:59,060 INFO L226 Difference]: Without dead ends: 60646 [2021-06-12 22:13:59,060 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 631.0ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:13:59,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60646 states. [2021-06-12 22:14:00,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60646 to 43335. [2021-06-12 22:14:00,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43335 states, 43334 states have (on average 3.8610790603221488) internal successors, (167316), 43334 states have internal predecessors, (167316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:00,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43335 states to 43335 states and 167316 transitions. [2021-06-12 22:14:00,299 INFO L78 Accepts]: Start accepts. Automaton has 43335 states and 167316 transitions. Word has length 28 [2021-06-12 22:14:00,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:00,299 INFO L482 AbstractCegarLoop]: Abstraction has 43335 states and 167316 transitions. [2021-06-12 22:14:00,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:00,299 INFO L276 IsEmpty]: Start isEmpty. Operand 43335 states and 167316 transitions. [2021-06-12 22:14:00,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:00,362 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:00,362 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:00,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4174 [2021-06-12 22:14:00,563 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:00,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:00,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 156 times [2021-06-12 22:14:00,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:00,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549363337] [2021-06-12 22:14:00,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:00,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:00,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549363337] [2021-06-12 22:14:00,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549363337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:00,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203476760] [2021-06-12 22:14:00,599 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:00,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:14:00,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:00,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:00,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:00,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:00,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203476760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:00,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:00,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:14:00,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989059803] [2021-06-12 22:14:00,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:14:00,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:00,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:14:00,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:14:00,716 INFO L87 Difference]: Start difference. First operand 43335 states and 167316 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:02,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:02,197 INFO L93 Difference]: Finished difference Result 59923 states and 223885 transitions. [2021-06-12 22:14:02,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 22:14:02,197 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:14:02,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:02,493 INFO L225 Difference]: With dead ends: 59923 [2021-06-12 22:14:02,494 INFO L226 Difference]: Without dead ends: 59923 [2021-06-12 22:14:02,494 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 764.4ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 22:14:02,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59923 states. [2021-06-12 22:14:03,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59923 to 44240. [2021-06-12 22:14:03,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44240 states, 44239 states have (on average 3.851511110106467) internal successors, (170387), 44239 states have internal predecessors, (170387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44240 states to 44240 states and 170387 transitions. [2021-06-12 22:14:03,742 INFO L78 Accepts]: Start accepts. Automaton has 44240 states and 170387 transitions. Word has length 28 [2021-06-12 22:14:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:03,742 INFO L482 AbstractCegarLoop]: Abstraction has 44240 states and 170387 transitions. [2021-06-12 22:14:03,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 44240 states and 170387 transitions. [2021-06-12 22:14:03,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:03,810 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:03,810 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:04,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4175 [2021-06-12 22:14:04,011 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:04,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:04,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 157 times [2021-06-12 22:14:04,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:04,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600017044] [2021-06-12 22:14:04,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:04,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:04,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600017044] [2021-06-12 22:14:04,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600017044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:04,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034279223] [2021-06-12 22:14:04,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:04,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:04,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:04,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034279223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:04,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:04,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:14:04,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398062474] [2021-06-12 22:14:04,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:14:04,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:04,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:14:04,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:14:04,157 INFO L87 Difference]: Start difference. First operand 44240 states and 170387 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:05,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:05,438 INFO L93 Difference]: Finished difference Result 59425 states and 222490 transitions. [2021-06-12 22:14:05,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:14:05,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:14:05,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:05,600 INFO L225 Difference]: With dead ends: 59425 [2021-06-12 22:14:05,600 INFO L226 Difference]: Without dead ends: 59417 [2021-06-12 22:14:05,600 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 753.6ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:14:05,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59417 states. [2021-06-12 22:14:06,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59417 to 44164. [2021-06-12 22:14:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44164 states, 44163 states have (on average 3.8527953264044563) internal successors, (170151), 44163 states have internal predecessors, (170151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:06,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44164 states to 44164 states and 170151 transitions. [2021-06-12 22:14:06,861 INFO L78 Accepts]: Start accepts. Automaton has 44164 states and 170151 transitions. Word has length 28 [2021-06-12 22:14:06,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:06,861 INFO L482 AbstractCegarLoop]: Abstraction has 44164 states and 170151 transitions. [2021-06-12 22:14:06,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:06,862 INFO L276 IsEmpty]: Start isEmpty. Operand 44164 states and 170151 transitions. [2021-06-12 22:14:06,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:06,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:06,928 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:07,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4176 [2021-06-12 22:14:07,133 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:07,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:07,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 158 times [2021-06-12 22:14:07,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:07,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200097290] [2021-06-12 22:14:07,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:07,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:07,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200097290] [2021-06-12 22:14:07,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200097290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:07,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238915406] [2021-06-12 22:14:07,168 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:07,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:07,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:07,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:07,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:07,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238915406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:07,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:07,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:14:07,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018128903] [2021-06-12 22:14:07,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:14:07,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:07,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:14:07,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:14:07,268 INFO L87 Difference]: Start difference. First operand 44164 states and 170151 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:08,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:08,617 INFO L93 Difference]: Finished difference Result 58902 states and 221244 transitions. [2021-06-12 22:14:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:14:08,617 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-12 22:14:08,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:08,757 INFO L225 Difference]: With dead ends: 58902 [2021-06-12 22:14:08,757 INFO L226 Difference]: Without dead ends: 58878 [2021-06-12 22:14:08,757 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 513.5ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:14:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58878 states. [2021-06-12 22:14:09,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58878 to 44150. [2021-06-12 22:14:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44150 states, 44149 states have (on average 3.8527712971981245) internal successors, (170096), 44149 states have internal predecessors, (170096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:09,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44150 states to 44150 states and 170096 transitions. [2021-06-12 22:14:09,992 INFO L78 Accepts]: Start accepts. Automaton has 44150 states and 170096 transitions. Word has length 28 [2021-06-12 22:14:09,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:09,992 INFO L482 AbstractCegarLoop]: Abstraction has 44150 states and 170096 transitions. [2021-06-12 22:14:09,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:09,992 INFO L276 IsEmpty]: Start isEmpty. Operand 44150 states and 170096 transitions. [2021-06-12 22:14:10,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:10,059 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:10,059 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:10,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4177 [2021-06-12 22:14:10,259 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:10,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:10,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 159 times [2021-06-12 22:14:10,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:10,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464930302] [2021-06-12 22:14:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:10,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:10,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464930302] [2021-06-12 22:14:10,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464930302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:10,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882829469] [2021-06-12 22:14:10,295 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:10,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:14:10,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:10,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:10,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:10,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882829469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:10,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:10,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:14:10,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778175353] [2021-06-12 22:14:10,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:14:10,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:10,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:14:10,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:14:10,386 INFO L87 Difference]: Start difference. First operand 44150 states and 170096 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:11,172 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-12 22:14:11,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:11,545 INFO L93 Difference]: Finished difference Result 58684 states and 220551 transitions. [2021-06-12 22:14:11,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:14:11,545 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 28 [2021-06-12 22:14:11,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:11,704 INFO L225 Difference]: With dead ends: 58684 [2021-06-12 22:14:11,704 INFO L226 Difference]: Without dead ends: 58644 [2021-06-12 22:14:11,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 657.2ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:14:11,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58644 states. [2021-06-12 22:14:12,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58644 to 44499. [2021-06-12 22:14:12,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44499 states, 44498 states have (on average 3.854667625511259) internal successors, (171525), 44498 states have internal predecessors, (171525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44499 states to 44499 states and 171525 transitions. [2021-06-12 22:14:13,024 INFO L78 Accepts]: Start accepts. Automaton has 44499 states and 171525 transitions. Word has length 28 [2021-06-12 22:14:13,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:13,024 INFO L482 AbstractCegarLoop]: Abstraction has 44499 states and 171525 transitions. [2021-06-12 22:14:13,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 44499 states and 171525 transitions. [2021-06-12 22:14:13,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:13,090 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:13,090 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:13,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4178 [2021-06-12 22:14:13,290 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:13,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:13,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 160 times [2021-06-12 22:14:13,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:13,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168517031] [2021-06-12 22:14:13,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:13,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:13,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168517031] [2021-06-12 22:14:13,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168517031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:13,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382634532] [2021-06-12 22:14:13,325 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:13,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:14:13,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:13,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:13,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:13,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382634532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:13,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:13,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:14:13,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637569572] [2021-06-12 22:14:13,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:14:13,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:13,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:14:13,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:14:13,431 INFO L87 Difference]: Start difference. First operand 44499 states and 171525 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:14,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:14,684 INFO L93 Difference]: Finished difference Result 71216 states and 265043 transitions. [2021-06-12 22:14:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:14:14,684 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:14:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:15,057 INFO L225 Difference]: With dead ends: 71216 [2021-06-12 22:14:15,057 INFO L226 Difference]: Without dead ends: 71216 [2021-06-12 22:14:15,058 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 689.0ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:14:15,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71216 states. [2021-06-12 22:14:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71216 to 45665. [2021-06-12 22:14:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45665 states, 45664 states have (on average 3.8691310441485633) internal successors, (176680), 45664 states have internal predecessors, (176680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:16,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45665 states to 45665 states and 176680 transitions. [2021-06-12 22:14:16,356 INFO L78 Accepts]: Start accepts. Automaton has 45665 states and 176680 transitions. Word has length 28 [2021-06-12 22:14:16,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:16,356 INFO L482 AbstractCegarLoop]: Abstraction has 45665 states and 176680 transitions. [2021-06-12 22:14:16,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:16,356 INFO L276 IsEmpty]: Start isEmpty. Operand 45665 states and 176680 transitions. [2021-06-12 22:14:16,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:16,423 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:16,423 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:16,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4179,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:16,637 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:16,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:16,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 161 times [2021-06-12 22:14:16,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:16,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806253004] [2021-06-12 22:14:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:16,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:16,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806253004] [2021-06-12 22:14:16,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806253004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:16,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556909324] [2021-06-12 22:14:16,672 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:16,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:14:16,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:16,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:16,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:16,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556909324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:16,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:16,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:14:16,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382490457] [2021-06-12 22:14:16,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:14:16,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:16,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:14:16,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:14:16,777 INFO L87 Difference]: Start difference. First operand 45665 states and 176680 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:17,577 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-12 22:14:17,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:17,980 INFO L93 Difference]: Finished difference Result 65301 states and 246293 transitions. [2021-06-12 22:14:17,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:14:17,980 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-12 22:14:17,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:18,155 INFO L225 Difference]: With dead ends: 65301 [2021-06-12 22:14:18,155 INFO L226 Difference]: Without dead ends: 65301 [2021-06-12 22:14:18,156 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 649.3ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:14:18,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65301 states. [2021-06-12 22:14:19,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65301 to 45695. [2021-06-12 22:14:19,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45695 states, 45694 states have (on average 3.8689324637808027) internal successors, (176787), 45694 states have internal predecessors, (176787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:19,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45695 states to 45695 states and 176787 transitions. [2021-06-12 22:14:19,590 INFO L78 Accepts]: Start accepts. Automaton has 45695 states and 176787 transitions. Word has length 28 [2021-06-12 22:14:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:19,590 INFO L482 AbstractCegarLoop]: Abstraction has 45695 states and 176787 transitions. [2021-06-12 22:14:19,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:19,590 INFO L276 IsEmpty]: Start isEmpty. Operand 45695 states and 176787 transitions. [2021-06-12 22:14:19,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:19,660 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:19,660 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:19,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4180,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:19,861 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:19,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:19,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 162 times [2021-06-12 22:14:19,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:19,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192762862] [2021-06-12 22:14:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:19,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:19,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192762862] [2021-06-12 22:14:19,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192762862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:19,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815246922] [2021-06-12 22:14:19,903 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:19,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:14:19,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:19,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:19,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:20,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815246922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:20,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:20,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:14:20,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775663531] [2021-06-12 22:14:20,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:14:20,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:20,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:14:20,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:14:20,194 INFO L87 Difference]: Start difference. First operand 45695 states and 176787 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:21,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:21,757 INFO L93 Difference]: Finished difference Result 66159 states and 248729 transitions. [2021-06-12 22:14:21,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-12 22:14:21,757 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:14:21,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:21,937 INFO L225 Difference]: With dead ends: 66159 [2021-06-12 22:14:21,937 INFO L226 Difference]: Without dead ends: 66159 [2021-06-12 22:14:21,938 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 842.5ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 22:14:22,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66159 states. [2021-06-12 22:14:23,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66159 to 45959. [2021-06-12 22:14:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45959 states, 45958 states have (on average 3.8653770834239958) internal successors, (177645), 45958 states have internal predecessors, (177645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45959 states to 45959 states and 177645 transitions. [2021-06-12 22:14:23,292 INFO L78 Accepts]: Start accepts. Automaton has 45959 states and 177645 transitions. Word has length 28 [2021-06-12 22:14:23,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:23,292 INFO L482 AbstractCegarLoop]: Abstraction has 45959 states and 177645 transitions. [2021-06-12 22:14:23,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:23,292 INFO L276 IsEmpty]: Start isEmpty. Operand 45959 states and 177645 transitions. [2021-06-12 22:14:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:23,360 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:23,360 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:23,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4181 [2021-06-12 22:14:23,560 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:23,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:23,561 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 163 times [2021-06-12 22:14:23,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:23,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685617012] [2021-06-12 22:14:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:23,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:23,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685617012] [2021-06-12 22:14:23,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685617012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:23,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451043787] [2021-06-12 22:14:23,595 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:23,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:23,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:23,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451043787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:23,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:23,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:14:23,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965817794] [2021-06-12 22:14:23,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:14:23,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:23,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:14:23,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:14:23,704 INFO L87 Difference]: Start difference. First operand 45959 states and 177645 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:25,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:25,257 INFO L93 Difference]: Finished difference Result 65371 states and 246494 transitions. [2021-06-12 22:14:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:14:25,257 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:14:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:25,425 INFO L225 Difference]: With dead ends: 65371 [2021-06-12 22:14:25,425 INFO L226 Difference]: Without dead ends: 65367 [2021-06-12 22:14:25,426 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 658.6ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 22:14:25,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65367 states. [2021-06-12 22:14:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65367 to 45595. [2021-06-12 22:14:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45595 states, 45594 states have (on average 3.8691275167785233) internal successors, (176409), 45594 states have internal predecessors, (176409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:26,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45595 states to 45595 states and 176409 transitions. [2021-06-12 22:14:26,728 INFO L78 Accepts]: Start accepts. Automaton has 45595 states and 176409 transitions. Word has length 28 [2021-06-12 22:14:26,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:26,728 INFO L482 AbstractCegarLoop]: Abstraction has 45595 states and 176409 transitions. [2021-06-12 22:14:26,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:26,728 INFO L276 IsEmpty]: Start isEmpty. Operand 45595 states and 176409 transitions. [2021-06-12 22:14:26,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:26,794 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:26,794 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:26,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4182,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:26,994 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:26,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:26,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 164 times [2021-06-12 22:14:26,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:26,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591942819] [2021-06-12 22:14:26,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:27,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:27,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591942819] [2021-06-12 22:14:27,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591942819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:27,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360562382] [2021-06-12 22:14:27,030 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:27,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:27,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:27,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:27,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:27,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360562382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:27,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:27,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:14:27,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804072394] [2021-06-12 22:14:27,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:14:27,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:27,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:14:27,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:14:27,144 INFO L87 Difference]: Start difference. First operand 45595 states and 176409 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:28,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:28,170 INFO L93 Difference]: Finished difference Result 59692 states and 226868 transitions. [2021-06-12 22:14:28,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:14:28,170 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-12 22:14:28,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:28,328 INFO L225 Difference]: With dead ends: 59692 [2021-06-12 22:14:28,329 INFO L226 Difference]: Without dead ends: 59692 [2021-06-12 22:14:28,329 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 595.0ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 22:14:28,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59692 states. [2021-06-12 22:14:29,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59692 to 45611. [2021-06-12 22:14:29,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45611 states, 45610 states have (on average 3.8710151282613463) internal successors, (176557), 45610 states have internal predecessors, (176557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:29,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45611 states to 45611 states and 176557 transitions. [2021-06-12 22:14:29,768 INFO L78 Accepts]: Start accepts. Automaton has 45611 states and 176557 transitions. Word has length 28 [2021-06-12 22:14:29,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:29,768 INFO L482 AbstractCegarLoop]: Abstraction has 45611 states and 176557 transitions. [2021-06-12 22:14:29,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:29,769 INFO L276 IsEmpty]: Start isEmpty. Operand 45611 states and 176557 transitions. [2021-06-12 22:14:29,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:29,848 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:29,848 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:30,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4183,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:30,048 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:30,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:30,049 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 165 times [2021-06-12 22:14:30,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:30,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065544965] [2021-06-12 22:14:30,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:30,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:30,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065544965] [2021-06-12 22:14:30,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065544965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:30,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430812769] [2021-06-12 22:14:30,088 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:30,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:14:30,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:30,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:30,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:30,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430812769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:30,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:30,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:14:30,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926425501] [2021-06-12 22:14:30,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:14:30,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:30,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:14:30,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:14:30,188 INFO L87 Difference]: Start difference. First operand 45611 states and 176557 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:31,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:31,085 INFO L93 Difference]: Finished difference Result 59006 states and 224993 transitions. [2021-06-12 22:14:31,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:14:31,086 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-12 22:14:31,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:31,233 INFO L225 Difference]: With dead ends: 59006 [2021-06-12 22:14:31,233 INFO L226 Difference]: Without dead ends: 58994 [2021-06-12 22:14:31,233 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 327.4ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:14:31,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58994 states. [2021-06-12 22:14:32,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58994 to 45545. [2021-06-12 22:14:32,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45545 states, 45544 states have (on average 3.8721675742139468) internal successors, (176354), 45544 states have internal predecessors, (176354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45545 states to 45545 states and 176354 transitions. [2021-06-12 22:14:32,447 INFO L78 Accepts]: Start accepts. Automaton has 45545 states and 176354 transitions. Word has length 28 [2021-06-12 22:14:32,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:32,447 INFO L482 AbstractCegarLoop]: Abstraction has 45545 states and 176354 transitions. [2021-06-12 22:14:32,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:32,447 INFO L276 IsEmpty]: Start isEmpty. Operand 45545 states and 176354 transitions. [2021-06-12 22:14:32,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:32,515 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:32,515 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:32,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4184 [2021-06-12 22:14:32,716 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:32,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:32,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 166 times [2021-06-12 22:14:32,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:32,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519139335] [2021-06-12 22:14:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:32,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:32,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519139335] [2021-06-12 22:14:32,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519139335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:32,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270696907] [2021-06-12 22:14:32,754 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:32,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:14:32,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:32,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:32,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:32,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270696907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:32,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:32,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:14:32,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020062147] [2021-06-12 22:14:32,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:14:32,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:32,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:14:32,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:14:32,861 INFO L87 Difference]: Start difference. First operand 45545 states and 176354 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:33,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:33,639 INFO L93 Difference]: Finished difference Result 50032 states and 191152 transitions. [2021-06-12 22:14:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:14:33,639 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-12 22:14:33,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:33,776 INFO L225 Difference]: With dead ends: 50032 [2021-06-12 22:14:33,776 INFO L226 Difference]: Without dead ends: 50032 [2021-06-12 22:14:33,776 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 443.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:14:33,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50032 states. [2021-06-12 22:14:34,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50032 to 45753. [2021-06-12 22:14:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45753 states, 45752 states have (on average 3.86968875677566) internal successors, (177046), 45752 states have internal predecessors, (177046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45753 states to 45753 states and 177046 transitions. [2021-06-12 22:14:34,921 INFO L78 Accepts]: Start accepts. Automaton has 45753 states and 177046 transitions. Word has length 28 [2021-06-12 22:14:34,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:34,921 INFO L482 AbstractCegarLoop]: Abstraction has 45753 states and 177046 transitions. [2021-06-12 22:14:34,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:34,921 INFO L276 IsEmpty]: Start isEmpty. Operand 45753 states and 177046 transitions. [2021-06-12 22:14:34,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:34,988 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:34,988 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:35,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4185 [2021-06-12 22:14:35,189 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:35,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:35,189 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 167 times [2021-06-12 22:14:35,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:35,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884731073] [2021-06-12 22:14:35,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:35,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:35,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884731073] [2021-06-12 22:14:35,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884731073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:35,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840898574] [2021-06-12 22:14:35,225 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:35,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:14:35,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:35,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:35,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:35,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840898574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:35,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:35,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:14:35,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530668310] [2021-06-12 22:14:35,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:14:35,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:35,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:14:35,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:14:35,323 INFO L87 Difference]: Start difference. First operand 45753 states and 177046 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:36,016 INFO L93 Difference]: Finished difference Result 49879 states and 190754 transitions. [2021-06-12 22:14:36,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:14:36,016 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:14:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:36,145 INFO L225 Difference]: With dead ends: 49879 [2021-06-12 22:14:36,145 INFO L226 Difference]: Without dead ends: 49875 [2021-06-12 22:14:36,145 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:14:36,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49875 states. [2021-06-12 22:14:37,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49875 to 45693. [2021-06-12 22:14:37,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45693 states, 45692 states have (on average 3.8705681519740875) internal successors, (176854), 45692 states have internal predecessors, (176854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45693 states to 45693 states and 176854 transitions. [2021-06-12 22:14:37,302 INFO L78 Accepts]: Start accepts. Automaton has 45693 states and 176854 transitions. Word has length 28 [2021-06-12 22:14:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:37,302 INFO L482 AbstractCegarLoop]: Abstraction has 45693 states and 176854 transitions. [2021-06-12 22:14:37,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 45693 states and 176854 transitions. [2021-06-12 22:14:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:37,372 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:37,372 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:37,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4186 [2021-06-12 22:14:37,573 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:37,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:37,573 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 78 times [2021-06-12 22:14:37,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:37,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020019035] [2021-06-12 22:14:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:37,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:37,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020019035] [2021-06-12 22:14:37,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020019035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:37,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718642839] [2021-06-12 22:14:37,609 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:37,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:14:37,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:37,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:37,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:37,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718642839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:37,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:37,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 22:14:37,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870072119] [2021-06-12 22:14:37,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:14:37,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:37,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:14:37,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:14:37,678 INFO L87 Difference]: Start difference. First operand 45693 states and 176854 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:38,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:38,560 INFO L93 Difference]: Finished difference Result 49934 states and 190867 transitions. [2021-06-12 22:14:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:14:38,561 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 28 [2021-06-12 22:14:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:38,711 INFO L225 Difference]: With dead ends: 49934 [2021-06-12 22:14:38,711 INFO L226 Difference]: Without dead ends: 49934 [2021-06-12 22:14:38,711 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:14:38,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49934 states. [2021-06-12 22:14:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49934 to 45797. [2021-06-12 22:14:39,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45797 states, 45796 states have (on average 3.8688531749497774) internal successors, (177178), 45796 states have internal predecessors, (177178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45797 states to 45797 states and 177178 transitions. [2021-06-12 22:14:39,886 INFO L78 Accepts]: Start accepts. Automaton has 45797 states and 177178 transitions. Word has length 28 [2021-06-12 22:14:39,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:39,886 INFO L482 AbstractCegarLoop]: Abstraction has 45797 states and 177178 transitions. [2021-06-12 22:14:39,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:39,886 INFO L276 IsEmpty]: Start isEmpty. Operand 45797 states and 177178 transitions. [2021-06-12 22:14:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:39,966 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:39,966 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:40,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4187,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:40,167 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:40,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:40,167 INFO L82 PathProgramCache]: Analyzing trace with hash -751583464, now seen corresponding path program 79 times [2021-06-12 22:14:40,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:40,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753170613] [2021-06-12 22:14:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:40,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:40,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753170613] [2021-06-12 22:14:40,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753170613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:40,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942100271] [2021-06-12 22:14:40,209 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:40,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:40,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:40,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942100271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:40,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:40,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 22:14:40,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125787448] [2021-06-12 22:14:40,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:14:40,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:40,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:14:40,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:14:40,313 INFO L87 Difference]: Start difference. First operand 45797 states and 177178 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-12 22:14:41,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:41,048 INFO L93 Difference]: Finished difference Result 56721 states and 216081 transitions. [2021-06-12 22:14:41,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:14:41,049 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:14:41,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:41,183 INFO L225 Difference]: With dead ends: 56721 [2021-06-12 22:14:41,184 INFO L226 Difference]: Without dead ends: 56631 [2021-06-12 22:14:41,184 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:14:41,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56631 states. [2021-06-12 22:14:42,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56631 to 45626. [2021-06-12 22:14:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45626 states, 45625 states have (on average 3.866717808219178) internal successors, (176419), 45625 states have internal predecessors, (176419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:42,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45626 states to 45626 states and 176419 transitions. [2021-06-12 22:14:42,367 INFO L78 Accepts]: Start accepts. Automaton has 45626 states and 176419 transitions. Word has length 28 [2021-06-12 22:14:42,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:42,367 INFO L482 AbstractCegarLoop]: Abstraction has 45626 states and 176419 transitions. [2021-06-12 22:14:42,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-12 22:14:42,367 INFO L276 IsEmpty]: Start isEmpty. Operand 45626 states and 176419 transitions. [2021-06-12 22:14:42,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:42,437 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:42,437 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:42,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4188 [2021-06-12 22:14:42,638 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:42,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:42,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 80 times [2021-06-12 22:14:42,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:42,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370403135] [2021-06-12 22:14:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:14:42,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:42,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370403135] [2021-06-12 22:14:42,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370403135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:42,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826548375] [2021-06-12 22:14:42,668 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:42,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:42,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:42,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:42,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:14:42,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826548375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:42,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:42,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-12 22:14:42,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458333139] [2021-06-12 22:14:42,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:14:42,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:42,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:14:42,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:14:42,733 INFO L87 Difference]: Start difference. First operand 45626 states and 176419 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:43,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:43,345 INFO L93 Difference]: Finished difference Result 50119 states and 191428 transitions. [2021-06-12 22:14:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:14:43,346 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 28 [2021-06-12 22:14:43,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:43,472 INFO L225 Difference]: With dead ends: 50119 [2021-06-12 22:14:43,472 INFO L226 Difference]: Without dead ends: 50107 [2021-06-12 22:14:43,473 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:14:43,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50107 states. [2021-06-12 22:14:44,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50107 to 45780. [2021-06-12 22:14:44,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45780 states, 45779 states have (on average 3.864523034579174) internal successors, (176914), 45779 states have internal predecessors, (176914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:44,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45780 states to 45780 states and 176914 transitions. [2021-06-12 22:14:44,688 INFO L78 Accepts]: Start accepts. Automaton has 45780 states and 176914 transitions. Word has length 28 [2021-06-12 22:14:44,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:44,688 INFO L482 AbstractCegarLoop]: Abstraction has 45780 states and 176914 transitions. [2021-06-12 22:14:44,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:44,688 INFO L276 IsEmpty]: Start isEmpty. Operand 45780 states and 176914 transitions. [2021-06-12 22:14:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:44,763 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:44,763 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:44,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4189 [2021-06-12 22:14:44,965 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:44,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:44,965 INFO L82 PathProgramCache]: Analyzing trace with hash 421559068, now seen corresponding path program 81 times [2021-06-12 22:14:44,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:44,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111578472] [2021-06-12 22:14:44,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:45,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:45,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111578472] [2021-06-12 22:14:45,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111578472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:45,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82521098] [2021-06-12 22:14:45,011 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:45,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:14:45,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:45,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:14:45,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:45,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82521098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:45,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:45,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 22:14:45,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207081345] [2021-06-12 22:14:45,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:14:45,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:45,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:14:45,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:14:45,076 INFO L87 Difference]: Start difference. First operand 45780 states and 176914 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:45,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:45,525 INFO L93 Difference]: Finished difference Result 50083 states and 191344 transitions. [2021-06-12 22:14:45,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:14:45,526 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 28 [2021-06-12 22:14:45,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:45,858 INFO L225 Difference]: With dead ends: 50083 [2021-06-12 22:14:45,859 INFO L226 Difference]: Without dead ends: 50063 [2021-06-12 22:14:45,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:14:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50063 states. [2021-06-12 22:14:46,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50063 to 45780. [2021-06-12 22:14:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45780 states, 45779 states have (on average 3.8644356582712596) internal successors, (176910), 45779 states have internal predecessors, (176910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:46,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45780 states to 45780 states and 176910 transitions. [2021-06-12 22:14:46,828 INFO L78 Accepts]: Start accepts. Automaton has 45780 states and 176910 transitions. Word has length 28 [2021-06-12 22:14:46,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:46,828 INFO L482 AbstractCegarLoop]: Abstraction has 45780 states and 176910 transitions. [2021-06-12 22:14:46,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:46,828 INFO L276 IsEmpty]: Start isEmpty. Operand 45780 states and 176910 transitions. [2021-06-12 22:14:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:47,084 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:47,084 INFO L472 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] [2021-06-12 22:14:47,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4190,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:47,300 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:47,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:47,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119940, now seen corresponding path program 168 times [2021-06-12 22:14:47,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:47,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164042245] [2021-06-12 22:14:47,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:47,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:47,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164042245] [2021-06-12 22:14:47,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164042245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:47,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623377447] [2021-06-12 22:14:47,332 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:47,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:14:47,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:47,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:47,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:47,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623377447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:47,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:47,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:14:47,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452967014] [2021-06-12 22:14:47,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:14:47,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:47,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:14:47,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:14:47,408 INFO L87 Difference]: Start difference. First operand 45780 states and 176910 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:47,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:47,858 INFO L93 Difference]: Finished difference Result 50741 states and 194475 transitions. [2021-06-12 22:14:47,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:14:47,858 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:14:47,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:47,995 INFO L225 Difference]: With dead ends: 50741 [2021-06-12 22:14:47,995 INFO L226 Difference]: Without dead ends: 50728 [2021-06-12 22:14:47,995 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:14:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50728 states. [2021-06-12 22:14:49,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50728 to 48513. [2021-06-12 22:14:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48513 states, 48512 states have (on average 3.873330310026385) internal successors, (187903), 48512 states have internal predecessors, (187903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:49,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48513 states to 48513 states and 187903 transitions. [2021-06-12 22:14:49,222 INFO L78 Accepts]: Start accepts. Automaton has 48513 states and 187903 transitions. Word has length 28 [2021-06-12 22:14:49,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:49,222 INFO L482 AbstractCegarLoop]: Abstraction has 48513 states and 187903 transitions. [2021-06-12 22:14:49,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:49,222 INFO L276 IsEmpty]: Start isEmpty. Operand 48513 states and 187903 transitions. [2021-06-12 22:14:49,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:49,474 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:49,474 INFO L472 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] [2021-06-12 22:14:49,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4191 [2021-06-12 22:14:49,689 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:49,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1306375610, now seen corresponding path program 169 times [2021-06-12 22:14:49,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:49,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149234959] [2021-06-12 22:14:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:49,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:49,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149234959] [2021-06-12 22:14:49,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149234959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:49,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142864326] [2021-06-12 22:14:49,723 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:49,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:49,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:49,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142864326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:49,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:49,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:14:49,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134797378] [2021-06-12 22:14:49,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:14:49,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:49,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:14:49,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:14:49,804 INFO L87 Difference]: Start difference. First operand 48513 states and 187903 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:50,289 INFO L93 Difference]: Finished difference Result 54090 states and 205931 transitions. [2021-06-12 22:14:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:14:50,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:14:50,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:50,436 INFO L225 Difference]: With dead ends: 54090 [2021-06-12 22:14:50,437 INFO L226 Difference]: Without dead ends: 54090 [2021-06-12 22:14:50,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:14:50,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54090 states. [2021-06-12 22:14:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54090 to 43050. [2021-06-12 22:14:51,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43050 states, 43049 states have (on average 3.8601593532950824) internal successors, (166176), 43049 states have internal predecessors, (166176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43050 states to 43050 states and 166176 transitions. [2021-06-12 22:14:51,604 INFO L78 Accepts]: Start accepts. Automaton has 43050 states and 166176 transitions. Word has length 28 [2021-06-12 22:14:51,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:51,604 INFO L482 AbstractCegarLoop]: Abstraction has 43050 states and 166176 transitions. [2021-06-12 22:14:51,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:51,604 INFO L276 IsEmpty]: Start isEmpty. Operand 43050 states and 166176 transitions. [2021-06-12 22:14:51,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:51,668 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:51,668 INFO L472 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] [2021-06-12 22:14:51,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4192,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:51,869 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:51,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:51,870 INFO L82 PathProgramCache]: Analyzing trace with hash 986257146, now seen corresponding path program 170 times [2021-06-12 22:14:51,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:51,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382718145] [2021-06-12 22:14:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:51,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:51,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382718145] [2021-06-12 22:14:51,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382718145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:51,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227855012] [2021-06-12 22:14:51,901 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:51,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:51,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:51,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:51,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:52,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227855012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:52,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:52,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:14:52,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985096565] [2021-06-12 22:14:52,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:14:52,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:52,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:14:52,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:14:52,132 INFO L87 Difference]: Start difference. First operand 43050 states and 166176 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:52,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:52,652 INFO L93 Difference]: Finished difference Result 47933 states and 182630 transitions. [2021-06-12 22:14:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:14:52,652 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:14:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:52,774 INFO L225 Difference]: With dead ends: 47933 [2021-06-12 22:14:52,774 INFO L226 Difference]: Without dead ends: 47933 [2021-06-12 22:14:52,774 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 344.6ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:14:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47933 states. [2021-06-12 22:14:53,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47933 to 43883. [2021-06-12 22:14:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43883 states, 43882 states have (on average 3.858848730686842) internal successors, (169334), 43882 states have internal predecessors, (169334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43883 states to 43883 states and 169334 transitions. [2021-06-12 22:14:53,814 INFO L78 Accepts]: Start accepts. Automaton has 43883 states and 169334 transitions. Word has length 28 [2021-06-12 22:14:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:53,815 INFO L482 AbstractCegarLoop]: Abstraction has 43883 states and 169334 transitions. [2021-06-12 22:14:53,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:53,815 INFO L276 IsEmpty]: Start isEmpty. Operand 43883 states and 169334 transitions. [2021-06-12 22:14:53,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:53,879 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:53,879 INFO L472 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] [2021-06-12 22:14:54,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4193 [2021-06-12 22:14:54,079 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:54,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:54,080 INFO L82 PathProgramCache]: Analyzing trace with hash -22913030, now seen corresponding path program 171 times [2021-06-12 22:14:54,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:54,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473108373] [2021-06-12 22:14:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:54,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:54,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473108373] [2021-06-12 22:14:54,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473108373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:54,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681878716] [2021-06-12 22:14:54,117 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:54,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:14:54,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:54,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:54,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:54,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681878716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:54,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:54,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:14:54,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83259366] [2021-06-12 22:14:54,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:14:54,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:54,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:14:54,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:14:54,194 INFO L87 Difference]: Start difference. First operand 43883 states and 169334 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:54,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:54,763 INFO L93 Difference]: Finished difference Result 45643 states and 175210 transitions. [2021-06-12 22:14:54,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:14:54,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:14:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:54,876 INFO L225 Difference]: With dead ends: 45643 [2021-06-12 22:14:54,876 INFO L226 Difference]: Without dead ends: 45643 [2021-06-12 22:14:54,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:14:54,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45643 states. [2021-06-12 22:14:55,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45643 to 43891. [2021-06-12 22:14:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43891 states, 43890 states have (on average 3.8586921850079743) internal successors, (169358), 43890 states have internal predecessors, (169358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43891 states to 43891 states and 169358 transitions. [2021-06-12 22:14:55,981 INFO L78 Accepts]: Start accepts. Automaton has 43891 states and 169358 transitions. Word has length 28 [2021-06-12 22:14:55,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:55,982 INFO L482 AbstractCegarLoop]: Abstraction has 43891 states and 169358 transitions. [2021-06-12 22:14:55,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:55,982 INFO L276 IsEmpty]: Start isEmpty. Operand 43891 states and 169358 transitions. [2021-06-12 22:14:56,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:14:56,045 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:56,046 INFO L472 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] [2021-06-12 22:14:56,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4194 [2021-06-12 22:14:56,246 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:56,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:56,246 INFO L82 PathProgramCache]: Analyzing trace with hash -120181494, now seen corresponding path program 172 times [2021-06-12 22:14:56,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:56,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655363667] [2021-06-12 22:14:56,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:56,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:56,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655363667] [2021-06-12 22:14:56,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655363667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:56,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754923264] [2021-06-12 22:14:56,281 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:56,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:14:56,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:56,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:56,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:56,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754923264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:56,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:56,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:14:56,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233484266] [2021-06-12 22:14:56,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:14:56,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:56,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:14:56,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:14:56,365 INFO L87 Difference]: Start difference. First operand 43891 states and 169358 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:56,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:56,957 INFO L93 Difference]: Finished difference Result 45363 states and 174288 transitions. [2021-06-12 22:14:56,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:14:56,962 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:14:56,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:57,063 INFO L225 Difference]: With dead ends: 45363 [2021-06-12 22:14:57,063 INFO L226 Difference]: Without dead ends: 45363 [2021-06-12 22:14:57,063 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:14:57,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45363 states. [2021-06-12 22:14:57,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45363 to 43785. [2021-06-12 22:14:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43785 states, 43784 states have (on average 3.858350082221816) internal successors, (168934), 43784 states have internal predecessors, (168934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:57,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43785 states to 43785 states and 168934 transitions. [2021-06-12 22:14:57,951 INFO L78 Accepts]: Start accepts. Automaton has 43785 states and 168934 transitions. Word has length 28 [2021-06-12 22:14:57,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:57,951 INFO L482 AbstractCegarLoop]: Abstraction has 43785 states and 168934 transitions. [2021-06-12 22:14:57,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:57,952 INFO L276 IsEmpty]: Start isEmpty. Operand 43785 states and 168934 transitions. [2021-06-12 22:14:58,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:14:58,021 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:58,021 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:58,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4195,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:58,225 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:58,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:58,225 INFO L82 PathProgramCache]: Analyzing trace with hash -915745990, now seen corresponding path program 173 times [2021-06-12 22:14:58,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:58,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562386288] [2021-06-12 22:14:58,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:58,857 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-06-12 22:14:58,993 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-06-12 22:14:59,146 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-06-12 22:14:59,289 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-06-12 22:14:59,399 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-06-12 22:14:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:59,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:59,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562386288] [2021-06-12 22:14:59,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562386288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:59,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792819095] [2021-06-12 22:14:59,471 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:59,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:14:59,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:59,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:14:59,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:59,819 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-12 22:15:00,038 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-12 22:15:00,533 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 107 [2021-06-12 22:15:00,741 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-12 22:15:00,937 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-12 22:15:01,220 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-12 22:15:01,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:15:01,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:15:01,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:01,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:15:01,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:01,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:15:01,455 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:01,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:15:01,469 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:01,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:15:01,485 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:01,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:15:01,498 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:01,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:15:01,508 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:01,865 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 113 [2021-06-12 22:15:01,866 INFO L628 ElimStorePlain]: treesize reduction 98, result has 81.7 percent of original size [2021-06-12 22:15:01,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:15:01,880 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:01,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:15:01,892 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:01,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:15:01,902 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:01,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:15:01,913 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:01,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:15:01,923 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:01,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:15:01,933 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:01,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:15:01,944 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:01,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:01,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:01,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:15:01,951 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:02,063 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 22:15:02,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:02,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 2 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 22:15:02,069 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 20 variables, input treesize:725, output treesize:97 [2021-06-12 22:15:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:02,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792819095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:02,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:02,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 22:15:02,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320804883] [2021-06-12 22:15:02,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:15:02,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:02,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:15:02,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:15:02,162 INFO L87 Difference]: Start difference. First operand 43785 states and 168934 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:02,924 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-06-12 22:15:03,631 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 92 [2021-06-12 22:15:03,858 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 71 [2021-06-12 22:15:04,038 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 68 [2021-06-12 22:15:04,227 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 58 [2021-06-12 22:15:04,429 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-06-12 22:15:04,991 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 107 [2021-06-12 22:15:05,350 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 94 [2021-06-12 22:15:06,421 WARN L205 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 133 [2021-06-12 22:15:07,013 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 92 [2021-06-12 22:15:07,180 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-12 22:15:08,310 WARN L205 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 117 [2021-06-12 22:15:09,081 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 136 [2021-06-12 22:15:09,675 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 112 [2021-06-12 22:15:10,340 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 138 [2021-06-12 22:15:11,075 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 136 [2021-06-12 22:15:11,274 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-06-12 22:15:12,041 WARN L205 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 144 [2021-06-12 22:15:12,358 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2021-06-12 22:15:13,270 WARN L205 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 142 [2021-06-12 22:15:13,604 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2021-06-12 22:15:13,991 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-12 22:15:14,210 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-06-12 22:15:14,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:14,708 INFO L93 Difference]: Finished difference Result 51109 states and 190238 transitions. [2021-06-12 22:15:14,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:15:14,709 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 22:15:14,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:14,853 INFO L225 Difference]: With dead ends: 51109 [2021-06-12 22:15:14,853 INFO L226 Difference]: Without dead ends: 51049 [2021-06-12 22:15:14,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 13231.6ms TimeCoverageRelationStatistics Valid=557, Invalid=3103, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:15:14,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51049 states. [2021-06-12 22:15:15,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51049 to 43920. [2021-06-12 22:15:15,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43920 states, 43919 states have (on average 3.8575331860925797) internal successors, (169419), 43919 states have internal predecessors, (169419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43920 states to 43920 states and 169419 transitions. [2021-06-12 22:15:15,881 INFO L78 Accepts]: Start accepts. Automaton has 43920 states and 169419 transitions. Word has length 30 [2021-06-12 22:15:15,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:15,881 INFO L482 AbstractCegarLoop]: Abstraction has 43920 states and 169419 transitions. [2021-06-12 22:15:15,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:15,881 INFO L276 IsEmpty]: Start isEmpty. Operand 43920 states and 169419 transitions. [2021-06-12 22:15:15,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:15:15,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:15,951 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:16,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4196 [2021-06-12 22:15:16,151 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:16,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:16,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1350823290, now seen corresponding path program 174 times [2021-06-12 22:15:16,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:16,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093595772] [2021-06-12 22:15:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:16,522 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-06-12 22:15:16,671 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-12 22:15:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:16,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:16,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093595772] [2021-06-12 22:15:16,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093595772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:16,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950670479] [2021-06-12 22:15:16,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:16,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:15:16,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:16,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:15:16,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:17,257 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-06-12 22:15:17,729 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-12 22:15:18,013 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-12 22:15:18,825 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 134 [2021-06-12 22:15:19,106 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-12 22:15:20,086 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 181 [2021-06-12 22:15:20,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:20,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:20,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:20,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:20,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:20,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:20,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:20,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:20,342 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 36 treesize of output 19 [2021-06-12 22:15:20,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:20,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:20,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:20,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:20,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:20,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:20,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:20,360 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 31 treesize of output 19 [2021-06-12 22:15:20,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:21,107 WARN L205 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 217 [2021-06-12 22:15:21,107 INFO L628 ElimStorePlain]: treesize reduction 665, result has 42.2 percent of original size [2021-06-12 22:15:21,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:21,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:15:21,120 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:21,325 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-06-12 22:15:21,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:21,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:21,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:15:21,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:21,534 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2021-06-12 22:15:21,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:21,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:21,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:21,547 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 38 treesize of output 22 [2021-06-12 22:15:21,548 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:21,734 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2021-06-12 22:15:21,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:21,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:21,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:15:21,751 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:21,948 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2021-06-12 22:15:21,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:21,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:21,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:21,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:21,961 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 31 treesize of output 19 [2021-06-12 22:15:21,962 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:22,123 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-12 22:15:22,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:22,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:22,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:22,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:15:22,134 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:22,283 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-12 22:15:22,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:22,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:22,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:22,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:22,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:22,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:22,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:22,296 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 33 treesize of output 19 [2021-06-12 22:15:22,298 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:22,456 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-06-12 22:15:22,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:22,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:22,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:22,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:22,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:22,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:22,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:22,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:22,469 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 35 treesize of output 19 [2021-06-12 22:15:22,470 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:22,598 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-12 22:15:22,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:22,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:22,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:22,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 22:15:22,608 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:22,730 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-12 22:15:22,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:22,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:22,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:22,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:22,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:22,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:22,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:15:22,741 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:22,855 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-12 22:15:22,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:22,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 33 dim-0 vars, 11 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 22:15:22,863 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 44 variables, input treesize:1231, output treesize:100 [2021-06-12 22:15:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:22,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950670479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:22,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:22,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 22:15:22,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838438172] [2021-06-12 22:15:22,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:15:22,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:22,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:15:22,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:15:22,959 INFO L87 Difference]: Start difference. First operand 43920 states and 169419 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:23,138 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 35 [2021-06-12 22:15:23,433 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 52 [2021-06-12 22:15:23,776 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 110 [2021-06-12 22:15:23,921 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-06-12 22:15:24,951 WARN L205 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 128 [2021-06-12 22:15:25,472 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 86 [2021-06-12 22:15:25,742 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 73 [2021-06-12 22:15:26,070 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-06-12 22:15:27,513 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 174 DAG size of output: 161 [2021-06-12 22:15:28,587 WARN L205 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 148 [2021-06-12 22:15:28,810 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2021-06-12 22:15:28,999 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-06-12 22:15:31,004 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 215 DAG size of output: 181 [2021-06-12 22:15:31,520 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 146 [2021-06-12 22:15:32,088 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 147 [2021-06-12 22:15:32,473 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 72 [2021-06-12 22:15:32,887 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2021-06-12 22:15:34,741 WARN L205 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 251 DAG size of output: 213 [2021-06-12 22:15:34,952 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 66 [2021-06-12 22:15:35,118 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2021-06-12 22:15:35,463 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 63 [2021-06-12 22:15:35,735 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 56 [2021-06-12 22:15:36,053 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 69 [2021-06-12 22:15:36,311 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 50 [2021-06-12 22:15:36,867 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 61 [2021-06-12 22:15:37,321 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2021-06-12 22:15:37,843 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 57 [2021-06-12 22:15:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:37,978 INFO L93 Difference]: Finished difference Result 51275 states and 190720 transitions. [2021-06-12 22:15:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:15:37,978 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 22:15:37,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:38,116 INFO L225 Difference]: With dead ends: 51275 [2021-06-12 22:15:38,116 INFO L226 Difference]: Without dead ends: 51176 [2021-06-12 22:15:38,117 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 16305.0ms TimeCoverageRelationStatistics Valid=600, Invalid=2706, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:15:38,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51176 states. [2021-06-12 22:15:39,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51176 to 43931. [2021-06-12 22:15:39,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43931 states, 43930 states have (on average 3.857546096061917) internal successors, (169462), 43930 states have internal predecessors, (169462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43931 states to 43931 states and 169462 transitions. [2021-06-12 22:15:39,227 INFO L78 Accepts]: Start accepts. Automaton has 43931 states and 169462 transitions. Word has length 30 [2021-06-12 22:15:39,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:39,227 INFO L482 AbstractCegarLoop]: Abstraction has 43931 states and 169462 transitions. [2021-06-12 22:15:39,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:39,227 INFO L276 IsEmpty]: Start isEmpty. Operand 43931 states and 169462 transitions. [2021-06-12 22:15:39,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:15:39,300 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:39,300 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:39,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4219,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:39,500 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:39,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:39,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1352714698, now seen corresponding path program 175 times [2021-06-12 22:15:39,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:39,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438954958] [2021-06-12 22:15:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:39,729 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 54 [2021-06-12 22:15:40,165 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 112 [2021-06-12 22:15:40,434 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 49 [2021-06-12 22:15:40,632 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 117 [2021-06-12 22:15:40,925 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 54 [2021-06-12 22:15:41,374 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 158 [2021-06-12 22:15:41,929 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 76 [2021-06-12 22:15:42,114 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-12 22:15:42,289 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-06-12 22:15:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:42,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:42,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438954958] [2021-06-12 22:15:42,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438954958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:42,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422695469] [2021-06-12 22:15:42,432 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:42,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:15:42,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:43,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,599 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 51 treesize of output 25 [2021-06-12 22:15:43,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,612 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 50 treesize of output 28 [2021-06-12 22:15:43,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,624 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 48 treesize of output 22 [2021-06-12 22:15:43,625 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,637 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 51 treesize of output 22 [2021-06-12 22:15:43,638 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,650 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 52 treesize of output 28 [2021-06-12 22:15:43,650 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,662 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 46 treesize of output 19 [2021-06-12 22:15:43,663 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-06-12 22:15:43,677 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,689 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 42 treesize of output 22 [2021-06-12 22:15:43,690 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,702 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 44 treesize of output 16 [2021-06-12 22:15:43,703 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,716 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 43 treesize of output 22 [2021-06-12 22:15:43,717 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,730 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 53 treesize of output 25 [2021-06-12 22:15:43,730 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,743 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 53 treesize of output 25 [2021-06-12 22:15:43,744 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,756 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 42 treesize of output 22 [2021-06-12 22:15:43,757 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,770 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 53 treesize of output 25 [2021-06-12 22:15:43,771 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,784 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 38 treesize of output 16 [2021-06-12 22:15:43,786 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,799 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 47 treesize of output 25 [2021-06-12 22:15:43,800 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,813 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 47 treesize of output 25 [2021-06-12 22:15:43,814 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,827 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 47 treesize of output 25 [2021-06-12 22:15:43,828 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,841 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 54 treesize of output 22 [2021-06-12 22:15:43,842 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,855 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 53 treesize of output 25 [2021-06-12 22:15:43,856 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,869 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 47 treesize of output 25 [2021-06-12 22:15:43,869 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,882 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 38 treesize of output 16 [2021-06-12 22:15:43,882 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,896 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 42 treesize of output 22 [2021-06-12 22:15:43,896 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,910 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 42 treesize of output 22 [2021-06-12 22:15:43,911 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,924 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 45 treesize of output 25 [2021-06-12 22:15:43,925 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,938 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 51 treesize of output 25 [2021-06-12 22:15:43,938 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,952 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 43 treesize of output 22 [2021-06-12 22:15:43,952 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,966 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 51 treesize of output 22 [2021-06-12 22:15:43,967 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,981 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 45 treesize of output 25 [2021-06-12 22:15:43,981 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,995 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 39 treesize of output 19 [2021-06-12 22:15:43,995 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,010 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 35 treesize of output 19 [2021-06-12 22:15:44,011 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,026 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 47 treesize of output 25 [2021-06-12 22:15:44,027 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,043 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 53 treesize of output 25 [2021-06-12 22:15:44,044 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,059 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 47 treesize of output 25 [2021-06-12 22:15:44,060 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,074 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 51 treesize of output 25 [2021-06-12 22:15:44,075 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-12 22:15:44,090 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,105 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 42 treesize of output 22 [2021-06-12 22:15:44,105 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,120 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 44 treesize of output 22 [2021-06-12 22:15:44,120 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,134 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 51 treesize of output 25 [2021-06-12 22:15:44,135 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,149 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 53 treesize of output 22 [2021-06-12 22:15:44,150 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,163 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 42 treesize of output 22 [2021-06-12 22:15:44,163 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,177 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 50 treesize of output 28 [2021-06-12 22:15:44,178 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,191 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 47 treesize of output 25 [2021-06-12 22:15:44,192 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,206 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 46 treesize of output 16 [2021-06-12 22:15:44,207 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,221 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 40 treesize of output 22 [2021-06-12 22:15:44,222 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,235 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 37 treesize of output 19 [2021-06-12 22:15:44,236 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,253 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 42 treesize of output 22 [2021-06-12 22:15:44,254 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,268 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 42 treesize of output 22 [2021-06-12 22:15:44,269 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,283 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 44 treesize of output 19 [2021-06-12 22:15:44,283 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,297 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 35 treesize of output 19 [2021-06-12 22:15:44,297 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,311 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 33 treesize of output 16 [2021-06-12 22:15:44,312 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,326 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 56 treesize of output 25 [2021-06-12 22:15:44,327 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,340 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 33 treesize of output 16 [2021-06-12 22:15:44,340 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,354 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 51 treesize of output 25 [2021-06-12 22:15:44,355 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,369 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 54 treesize of output 25 [2021-06-12 22:15:44,369 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-06-12 22:15:44,384 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,398 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 56 treesize of output 22 [2021-06-12 22:15:44,398 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,411 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 53 treesize of output 25 [2021-06-12 22:15:44,412 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,425 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 51 treesize of output 25 [2021-06-12 22:15:44,426 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,436 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 42 treesize of output 22 [2021-06-12 22:15:44,437 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,448 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 53 treesize of output 22 [2021-06-12 22:15:44,449 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,459 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 40 treesize of output 22 [2021-06-12 22:15:44,460 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:44,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:44,465 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 47 treesize of output 25 [2021-06-12 22:15:44,466 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:44,556 INFO L628 ElimStorePlain]: treesize reduction 206, result has 26.7 percent of original size [2021-06-12 22:15:44,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:15:44,558 INFO L247 ElimStorePlain]: Needed 64 recursive calls to eliminate 2 variables, input treesize:3472, output treesize:51 [2021-06-12 22:15:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:44,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422695469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:44,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:44,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 22:15:44,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348459916] [2021-06-12 22:15:44,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:15:44,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:44,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:15:44,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:15:44,616 INFO L87 Difference]: Start difference. First operand 43931 states and 169462 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:45,155 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 70 [2021-06-12 22:15:45,523 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 71 [2021-06-12 22:15:45,925 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 68 [2021-06-12 22:15:46,353 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 71 [2021-06-12 22:15:46,726 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 94 [2021-06-12 22:15:46,983 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 82 [2021-06-12 22:15:47,149 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-12 22:15:47,351 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 74 [2021-06-12 22:15:47,811 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 69 [2021-06-12 22:15:48,239 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 92 [2021-06-12 22:15:48,407 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 67 [2021-06-12 22:15:48,752 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 80 [2021-06-12 22:15:48,995 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 85 [2021-06-12 22:15:49,170 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2021-06-12 22:15:49,480 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 72 [2021-06-12 22:15:49,681 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 75 [2021-06-12 22:15:49,913 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 77 [2021-06-12 22:15:50,431 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 109 [2021-06-12 22:15:50,812 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 106 [2021-06-12 22:15:51,061 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 67 [2021-06-12 22:15:51,236 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-12 22:15:51,418 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-12 22:15:51,712 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 73 [2021-06-12 22:15:51,929 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 71 [2021-06-12 22:15:52,187 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 78 [2021-06-12 22:15:52,722 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 95 [2021-06-12 22:15:52,983 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 83 [2021-06-12 22:15:53,215 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 74 [2021-06-12 22:15:53,538 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69