/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:29:05,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:29:05,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:29:05,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:29:06,004 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 16:29:06,023 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:29:06,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:29:06,024 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:29:06,024 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:29:06,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:29:06,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:29:06,025 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:29:06,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:29:06,025 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:29:06,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:29:06,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:29:06,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:29:06,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:29:06,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:29:06,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:29:06,026 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:29:06,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:29:06,026 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:29:06,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:29:06,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:29:06,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:29:06,027 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:29:06,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:29:06,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:29:06,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:29:06,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:29:06,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:29:06,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:29:06,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:29:06,028 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:29:06,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:29:06,028 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:29:06,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:29:06,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:29:06,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:29:06,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:29:06,391 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:29:06,392 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:29:06,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array.wvr.bpl [2021-06-05 16:29:06,393 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array.wvr.bpl' [2021-06-05 16:29:06,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:29:06,433 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:29:06,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:29:06,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:29:06,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:29:06,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:29:06" (1/1) ... [2021-06-05 16:29:06,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:29:06" (1/1) ... [2021-06-05 16:29:06,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:29:06,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:29:06,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:29:06,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:29:06,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:29:06" (1/1) ... [2021-06-05 16:29:06,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:29:06" (1/1) ... [2021-06-05 16:29:06,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:29:06" (1/1) ... [2021-06-05 16:29:06,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:29:06" (1/1) ... [2021-06-05 16:29:06,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:29:06" (1/1) ... [2021-06-05 16:29:06,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:29:06" (1/1) ... [2021-06-05 16:29:06,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:29:06" (1/1) ... [2021-06-05 16:29:06,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:29:06,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:29:06,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:29:06,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:29:06,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:29:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:29:06,550 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:29:06,550 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:29:06,550 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:29:06,551 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:29:06,551 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:29:06,551 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:29:06,551 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:29:06,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:29:06,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:29:06,551 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 16:29:06,553 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 16:29:06,553 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 16:29:06,554 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 16:29:06,803 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:29:06,803 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:29:06,805 INFO L202 PluginConnector]: Adding new model max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:29:06 BoogieIcfgContainer [2021-06-05 16:29:06,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:29:06,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:29:06,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:29:06,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:29:06,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:29:06" (1/2) ... [2021-06-05 16:29:06,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1571dba5 and model type max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:29:06, skipping insertion in model container [2021-06-05 16:29:06,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:29:06" (2/2) ... [2021-06-05 16:29:06,811 INFO L111 eAbstractionObserver]: Analyzing ICFG max-array.wvr.bpl [2021-06-05 16:29:06,816 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:29:06,816 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:29:06,816 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:29:06,817 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:29:06,851 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 16:29:06,869 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 16:29:06,904 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:29:06,904 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:29:06,904 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:29:06,904 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:29:06,904 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:29:06,905 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:29:06,905 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:29:06,905 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:29:06,928 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-05 16:29:06,963 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) [2021-06-05 16:29:06,966 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) [2021-06-05 16:29:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:29:06,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:06,973 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:06,974 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:06,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:06,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1272469491, now seen corresponding path program 1 times [2021-06-05 16:29:07,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:07,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992362129] [2021-06-05 16:29:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:07,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:07,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992362129] [2021-06-05 16:29:07,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992362129] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:29:07,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:29:07,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:29:07,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334420911] [2021-06-05 16:29:07,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:29:07,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:07,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:29:07,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:29:07,161 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) [2021-06-05 16:29:07,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:07,214 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-06-05 16:29:07,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:29:07,217 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 [2021-06-05 16:29:07,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:07,237 INFO L225 Difference]: With dead ends: 217 [2021-06-05 16:29:07,237 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 16:29:07,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:29:07,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 16:29:07,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-05 16:29:07,302 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) [2021-06-05 16:29:07,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-06-05 16:29:07,305 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-06-05 16:29:07,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:07,306 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-06-05 16:29:07,306 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) [2021-06-05 16:29:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-06-05 16:29:07,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:29:07,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:07,308 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:07,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:29:07,311 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:07,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:07,316 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-06-05 16:29:07,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:07,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793856527] [2021-06-05 16:29:07,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:29:07,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:07,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793856527] [2021-06-05 16:29:07,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793856527] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:29:07,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:29:07,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:29:07,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030765278] [2021-06-05 16:29:07,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:29:07,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:07,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:29:07,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:29:07,421 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) [2021-06-05 16:29:07,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:07,456 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-06-05 16:29:07,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:29:07,456 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 [2021-06-05 16:29:07,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:07,458 INFO L225 Difference]: With dead ends: 158 [2021-06-05 16:29:07,458 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 16:29:07,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:29:07,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 16:29:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-06-05 16:29:07,467 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) [2021-06-05 16:29:07,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-05 16:29:07,468 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-06-05 16:29:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:07,468 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-05 16:29:07,469 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) [2021-06-05 16:29:07,469 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-05 16:29:07,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:29:07,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:07,470 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:07,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 16:29:07,471 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:07,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:07,471 INFO L82 PathProgramCache]: Analyzing trace with hash 296923691, now seen corresponding path program 1 times [2021-06-05 16:29:07,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:07,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169413127] [2021-06-05 16:29:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:29:07,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:07,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169413127] [2021-06-05 16:29:07,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169413127] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:29:07,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:29:07,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:29:07,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372244219] [2021-06-05 16:29:07,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:29:07,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:07,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:29:07,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:29:07,515 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) [2021-06-05 16:29:07,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:07,553 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-06-05 16:29:07,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:29:07,553 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 [2021-06-05 16:29:07,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:07,557 INFO L225 Difference]: With dead ends: 183 [2021-06-05 16:29:07,557 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 16:29:07,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:29:07,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 16:29:07,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-05 16:29:07,567 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) [2021-06-05 16:29:07,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-05 16:29:07,569 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-05 16:29:07,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:07,569 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-05 16:29:07,569 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) [2021-06-05 16:29:07,569 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-05 16:29:07,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:29:07,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:07,571 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:07,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 16:29:07,571 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:07,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:07,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-06-05 16:29:07,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:07,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691448131] [2021-06-05 16:29:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:08,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:08,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691448131] [2021-06-05 16:29:08,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691448131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:08,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8360461] [2021-06-05 16:29:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:08,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:29:08,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:08,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:29:08,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:08,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:29:08,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:08,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:29:08,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:08,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:08,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:29:08,285 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:91, output treesize:15 [2021-06-05 16:29:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:08,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8360461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:08,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:08,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:29:08,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102329080] [2021-06-05 16:29:08,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:29:08,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:08,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:29:08,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:29:08,315 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-05 16:29:08,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:08,546 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-05 16:29:08,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:29:08,547 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:29:08,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:08,549 INFO L225 Difference]: With dead ends: 330 [2021-06-05 16:29:08,549 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 16:29:08,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 411.3ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:29:08,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 16:29:08,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-05 16:29:08,560 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) [2021-06-05 16:29:08,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-05 16:29:08,561 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-05 16:29:08,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:08,561 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-05 16:29:08,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-05 16:29:08,562 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-05 16:29:08,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:29:08,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:08,564 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:08,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:08,787 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:08,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:08,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-06-05 16:29:08,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:08,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425221508] [2021-06-05 16:29:08,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:09,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:09,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425221508] [2021-06-05 16:29:09,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425221508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:09,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831836359] [2021-06-05 16:29:09,045 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 [2021-06-05 16:29:09,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:29:09,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:09,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 16:29:09,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:09,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:09,459 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 [2021-06-05 16:29:09,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:09,484 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:29:09,485 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 [2021-06-05 16:29:09,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:09,498 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:29:09,498 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 [2021-06-05 16:29:09,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:09,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:09,510 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 [2021-06-05 16:29:09,512 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:09,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:09,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:29:09,580 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:124, output treesize:114 [2021-06-05 16:29:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:09,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831836359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:09,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:09,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 16:29:09,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484850393] [2021-06-05 16:29:09,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:29:09,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:09,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:29:09,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:29:09,752 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) [2021-06-05 16:29:10,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:10,531 INFO L93 Difference]: Finished difference Result 406 states and 1173 transitions. [2021-06-05 16:29:10,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:29:10,532 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 [2021-06-05 16:29:10,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:10,534 INFO L225 Difference]: With dead ends: 406 [2021-06-05 16:29:10,535 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 16:29:10,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 885.6ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:29:10,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 16:29:10,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 229. [2021-06-05 16:29:10,544 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) [2021-06-05 16:29:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-05 16:29:10,546 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-05 16:29:10,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:10,546 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-05 16:29:10,546 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) [2021-06-05 16:29:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-05 16:29:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:29:10,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:10,548 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:10,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:10,771 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:10,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:10,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-06-05 16:29:10,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:10,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459745869] [2021-06-05 16:29:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:10,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:10,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459745869] [2021-06-05 16:29:10,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459745869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:10,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032519372] [2021-06-05 16:29:10,920 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 [2021-06-05 16:29:10,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:29:10,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:10,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 16:29:10,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:11,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:29:11,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:11,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:29:11,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:11,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:29:11,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:11,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:11,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:29:11,094 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:67, output treesize:15 [2021-06-05 16:29:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:11,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032519372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:11,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:11,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:29:11,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833266254] [2021-06-05 16:29:11,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:29:11,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:11,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:29:11,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:29:11,150 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) 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) [2021-06-05 16:29:11,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:11,349 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-06-05 16:29:11,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:29:11,349 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) 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 22 [2021-06-05 16:29:11,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:11,352 INFO L225 Difference]: With dead ends: 363 [2021-06-05 16:29:11,352 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 16:29:11,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 261.9ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:29:11,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 16:29:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-06-05 16:29:11,362 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) [2021-06-05 16:29:11,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-05 16:29:11,363 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-05 16:29:11,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:11,364 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-05 16:29:11,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) 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) [2021-06-05 16:29:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-05 16:29:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:29:11,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:11,368 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:11,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:11,581 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:11,581 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-06-05 16:29:11,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:11,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101908916] [2021-06-05 16:29:11,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:11,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:11,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101908916] [2021-06-05 16:29:11,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101908916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:11,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532219542] [2021-06-05 16:29:11,727 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 [2021-06-05 16:29:11,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:29:11,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:11,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:29:11,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:11,975 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:29:11,975 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 [2021-06-05 16:29:11,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:11,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:11,990 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 [2021-06-05 16:29:11,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:12,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:12,052 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:29:12,053 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 [2021-06-05 16:29:12,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:12,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:12,065 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 [2021-06-05 16:29:12,076 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:12,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:12,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:29:12,128 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:121, output treesize:71 [2021-06-05 16:29:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:12,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532219542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:12,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:12,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:29:12,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198603502] [2021-06-05 16:29:12,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:29:12,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:12,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:29:12,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:12,259 INFO L87 Difference]: Start difference. First operand 241 states and 694 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) [2021-06-05 16:29:12,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:12,621 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-05 16:29:12,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:29:12,622 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 [2021-06-05 16:29:12,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:12,624 INFO L225 Difference]: With dead ends: 425 [2021-06-05 16:29:12,624 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 16:29:12,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 403.1ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:29:12,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 16:29:12,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-05 16:29:12,631 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) [2021-06-05 16:29:12,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-05 16:29:12,633 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-05 16:29:12,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:12,633 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-05 16:29:12,633 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) [2021-06-05 16:29:12,633 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-05 16:29:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:12,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:12,634 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:12,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:12,849 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:12,850 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-06-05 16:29:12,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:12,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994461450] [2021-06-05 16:29:12,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:12,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:12,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994461450] [2021-06-05 16:29:12,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994461450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:12,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489065157] [2021-06-05 16:29:12,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:12,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:29:12,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:12,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:12,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:13,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489065157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:13,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:13,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:29:13,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871818989] [2021-06-05 16:29:13,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:29:13,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:13,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:29:13,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:29:13,017 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) [2021-06-05 16:29:13,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:13,441 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-05 16:29:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:29:13,442 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 [2021-06-05 16:29:13,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:13,446 INFO L225 Difference]: With dead ends: 619 [2021-06-05 16:29:13,446 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 16:29:13,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 260.5ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:29:13,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 16:29:13,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-05 16:29:13,455 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) [2021-06-05 16:29:13,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-05 16:29:13,457 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-05 16:29:13,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:13,458 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-05 16:29:13,458 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) [2021-06-05 16:29:13,458 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-05 16:29:13,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:13,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:13,460 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:13,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:13,683 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:13,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:13,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-06-05 16:29:13,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:13,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14520795] [2021-06-05 16:29:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:13,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:13,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14520795] [2021-06-05 16:29:13,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14520795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:13,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807305147] [2021-06-05 16:29:13,728 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 [2021-06-05 16:29:13,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:29:13,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:13,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:13,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:13,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807305147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:13,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:13,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:29:13,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201400356] [2021-06-05 16:29:13,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:29:13,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:13,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:29:13,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:13,858 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) [2021-06-05 16:29:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:14,663 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-05 16:29:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:29:14,663 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 [2021-06-05 16:29:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:14,668 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 16:29:14,668 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 16:29:14,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 528.7ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:29:14,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 16:29:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-05 16:29:14,681 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) [2021-06-05 16:29:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-05 16:29:14,682 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-05 16:29:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:14,683 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-05 16:29:14,683 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) [2021-06-05 16:29:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-05 16:29:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:14,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:14,685 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:14,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:14,908 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:14,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-06-05 16:29:14,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:14,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427628717] [2021-06-05 16:29:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:14,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:14,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427628717] [2021-06-05 16:29:14,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427628717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:14,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573497440] [2021-06-05 16:29:14,967 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 [2021-06-05 16:29:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:15,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:15,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:15,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573497440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:15,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:15,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:29:15,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800020325] [2021-06-05 16:29:15,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:29:15,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:15,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:29:15,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:15,104 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) [2021-06-05 16:29:15,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:15,836 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-05 16:29:15,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:29:15,836 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 [2021-06-05 16:29:15,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:15,841 INFO L225 Difference]: With dead ends: 951 [2021-06-05 16:29:15,841 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 16:29:15,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 464.9ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:29:15,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 16:29:15,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-05 16:29:15,852 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) [2021-06-05 16:29:15,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-05 16:29:15,853 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-05 16:29:15,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:15,853 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-05 16:29:15,853 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) [2021-06-05 16:29:15,853 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-05 16:29:15,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:15,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:15,854 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:16,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:16,080 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:16,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:16,081 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-06-05 16:29:16,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:16,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434267285] [2021-06-05 16:29:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:29:16,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:16,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434267285] [2021-06-05 16:29:16,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434267285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:16,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080606255] [2021-06-05 16:29:16,111 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 [2021-06-05 16:29:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:16,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:29:16,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:29:16,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080606255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:16,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:16,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:29:16,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003548399] [2021-06-05 16:29:16,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:29:16,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:16,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:29:16,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:29:16,214 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) [2021-06-05 16:29:16,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:16,347 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-05 16:29:16,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:29:16,348 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 [2021-06-05 16:29:16,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:16,351 INFO L225 Difference]: With dead ends: 669 [2021-06-05 16:29:16,351 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 16:29:16,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:16,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 16:29:16,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-05 16:29:16,362 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) [2021-06-05 16:29:16,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-05 16:29:16,363 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-05 16:29:16,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:16,364 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-05 16:29:16,364 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) [2021-06-05 16:29:16,364 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-05 16:29:16,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:16,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:16,365 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:16,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 16:29:16,584 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:16,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:16,584 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-06-05 16:29:16,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:16,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782637436] [2021-06-05 16:29:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:16,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:16,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782637436] [2021-06-05 16:29:16,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782637436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:16,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023261508] [2021-06-05 16:29:16,625 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 [2021-06-05 16:29:16,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:29:16,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:16,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:16,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:16,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023261508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:16,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:16,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:29:16,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044218224] [2021-06-05 16:29:16,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:29:16,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:16,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:29:16,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:16,763 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) [2021-06-05 16:29:16,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:16,945 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-05 16:29:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:29:16,945 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 [2021-06-05 16:29:16,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:16,948 INFO L225 Difference]: With dead ends: 710 [2021-06-05 16:29:16,949 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 16:29:16,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:29:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 16:29:16,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-05 16:29:16,962 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) [2021-06-05 16:29:16,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-05 16:29:16,963 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-05 16:29:16,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:16,964 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-05 16:29:16,964 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) [2021-06-05 16:29:16,964 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-05 16:29:16,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:16,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:16,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:17,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:17,181 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:17,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:17,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-06-05 16:29:17,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:17,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561593139] [2021-06-05 16:29:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:29:17,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:17,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561593139] [2021-06-05 16:29:17,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561593139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:17,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534655387] [2021-06-05 16:29:17,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:17,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:29:17,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:17,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:29:17,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:29:17,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534655387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:17,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:17,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:29:17,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556107838] [2021-06-05 16:29:17,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:29:17,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:17,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:29:17,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:29:17,335 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) [2021-06-05 16:29:17,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:17,444 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-05 16:29:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:29:17,444 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 [2021-06-05 16:29:17,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:17,448 INFO L225 Difference]: With dead ends: 830 [2021-06-05 16:29:17,448 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 16:29:17,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:17,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 16:29:17,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-05 16:29:17,463 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) [2021-06-05 16:29:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-05 16:29:17,465 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-05 16:29:17,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:17,465 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-05 16:29:17,466 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) [2021-06-05 16:29:17,466 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-05 16:29:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:17,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:17,467 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:17,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:17,691 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:17,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:17,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-06-05 16:29:17,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:17,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205652355] [2021-06-05 16:29:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:17,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:17,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205652355] [2021-06-05 16:29:17,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205652355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:17,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57551153] [2021-06-05 16:29:17,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:17,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:29:17,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:17,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:17,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:17,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57551153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:17,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:17,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:29:17,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502255840] [2021-06-05 16:29:17,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:29:17,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:17,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:29:17,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:29:17,859 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) [2021-06-05 16:29:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:18,201 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-05 16:29:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:29:18,202 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 [2021-06-05 16:29:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:18,207 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 16:29:18,207 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 16:29:18,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 203.8ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:29:18,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 16:29:18,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-05 16:29:18,228 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) [2021-06-05 16:29:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-05 16:29:18,230 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-05 16:29:18,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:18,231 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-05 16:29:18,231 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) [2021-06-05 16:29:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-05 16:29:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:18,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:18,233 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:18,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 16:29:18,449 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:18,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:18,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-06-05 16:29:18,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:18,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181238714] [2021-06-05 16:29:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:18,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:18,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181238714] [2021-06-05 16:29:18,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181238714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:18,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810077172] [2021-06-05 16:29:18,493 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:18,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:29:18,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:18,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:18,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:18,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810077172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:18,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:18,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:29:18,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103677039] [2021-06-05 16:29:18,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:29:18,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:18,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:29:18,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:29:18,610 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) [2021-06-05 16:29:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:19,079 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-05 16:29:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:29:19,080 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 [2021-06-05 16:29:19,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:19,087 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 16:29:19,087 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 16:29:19,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 292.3ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:29:19,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 16:29:19,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-05 16:29:19,108 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) [2021-06-05 16:29:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-05 16:29:19,110 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-05 16:29:19,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:19,110 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-05 16:29:19,110 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) [2021-06-05 16:29:19,111 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-05 16:29:19,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:19,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:19,112 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:19,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 16:29:19,325 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:19,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:19,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-06-05 16:29:19,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:19,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836292604] [2021-06-05 16:29:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:19,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:19,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836292604] [2021-06-05 16:29:19,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836292604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:19,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914674481] [2021-06-05 16:29:19,365 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 [2021-06-05 16:29:19,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:29:19,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:19,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:19,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:19,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914674481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:19,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:19,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:29:19,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775315663] [2021-06-05 16:29:19,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:29:19,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:19,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:29:19,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:19,493 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) [2021-06-05 16:29:19,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:19,759 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-05 16:29:19,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:29:19,759 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 [2021-06-05 16:29:19,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:19,765 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 16:29:19,765 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 16:29:19,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:29:19,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 16:29:19,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-05 16:29:19,784 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) [2021-06-05 16:29:19,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-05 16:29:19,786 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-05 16:29:19,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:19,786 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-05 16:29:19,786 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) [2021-06-05 16:29:19,786 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-05 16:29:19,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:19,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:19,788 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:20,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 16:29:20,011 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:20,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:20,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-06-05 16:29:20,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:20,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861867923] [2021-06-05 16:29:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:20,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:20,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861867923] [2021-06-05 16:29:20,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861867923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:20,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520308907] [2021-06-05 16:29:20,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:20,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:29:20,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:20,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:20,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:20,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520308907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:20,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:20,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:29:20,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619983362] [2021-06-05 16:29:20,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:29:20,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:20,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:29:20,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:20,174 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) [2021-06-05 16:29:20,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:20,468 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-05 16:29:20,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:29:20,468 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 [2021-06-05 16:29:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:20,472 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 16:29:20,472 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 16:29:20,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 181.7ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:29:20,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 16:29:20,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-05 16:29:20,494 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) [2021-06-05 16:29:20,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-05 16:29:20,496 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-05 16:29:20,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:20,496 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-05 16:29:20,496 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) [2021-06-05 16:29:20,497 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-05 16:29:20,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:20,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:20,498 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:20,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:20,713 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:20,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:20,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-06-05 16:29:20,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:20,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225783374] [2021-06-05 16:29:20,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:20,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:20,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225783374] [2021-06-05 16:29:20,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225783374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:20,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098167915] [2021-06-05 16:29:20,749 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 [2021-06-05 16:29:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:20,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:20,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:20,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098167915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:20,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:20,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:29:20,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622604433] [2021-06-05 16:29:20,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:29:20,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:20,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:29:20,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:29:20,849 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) [2021-06-05 16:29:21,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:21,194 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-05 16:29:21,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:29:21,194 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 [2021-06-05 16:29:21,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:21,200 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 16:29:21,200 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 16:29:21,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:29:21,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 16:29:21,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-05 16:29:21,222 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) [2021-06-05 16:29:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-05 16:29:21,224 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-05 16:29:21,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:21,224 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-05 16:29:21,225 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) [2021-06-05 16:29:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-05 16:29:21,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:21,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:21,226 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:21,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:21,441 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:21,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:21,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-06-05 16:29:21,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:21,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726381202] [2021-06-05 16:29:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:21,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:21,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726381202] [2021-06-05 16:29:21,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726381202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:21,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912471222] [2021-06-05 16:29:21,479 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 [2021-06-05 16:29:21,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:29:21,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:21,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:21,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:21,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912471222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:21,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:21,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:29:21,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874555936] [2021-06-05 16:29:21,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:29:21,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:21,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:29:21,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:21,628 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) [2021-06-05 16:29:22,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:22,372 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-05 16:29:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:29:22,373 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 [2021-06-05 16:29:22,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:22,384 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 16:29:22,385 INFO L226 Difference]: Without dead ends: 2734 [2021-06-05 16:29:22,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 465.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:29:22,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-05 16:29:22,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-05 16:29:22,419 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) [2021-06-05 16:29:22,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-05 16:29:22,421 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-05 16:29:22,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:22,422 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-05 16:29:22,422 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) [2021-06-05 16:29:22,422 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-05 16:29:22,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:22,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:22,424 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:22,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:22,645 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:22,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:22,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-06-05 16:29:22,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:22,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142984916] [2021-06-05 16:29:22,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:22,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:22,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142984916] [2021-06-05 16:29:22,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142984916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:22,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132496161] [2021-06-05 16:29:22,687 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 [2021-06-05 16:29:22,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:29:22,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:22,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:22,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:22,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132496161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:22,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:22,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:29:22,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542534839] [2021-06-05 16:29:22,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:29:22,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:22,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:29:22,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:22,807 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) [2021-06-05 16:29:23,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:23,475 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-05 16:29:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:29:23,476 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 [2021-06-05 16:29:23,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:23,483 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 16:29:23,483 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 16:29:23,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 430.3ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:29:23,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 16:29:23,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-05 16:29:23,522 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) [2021-06-05 16:29:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-05 16:29:23,524 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-05 16:29:23,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:23,524 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-05 16:29:23,524 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) [2021-06-05 16:29:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-05 16:29:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:23,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:23,526 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:23,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:23,741 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:23,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-06-05 16:29:23,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:23,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461418186] [2021-06-05 16:29:23,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:23,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:23,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461418186] [2021-06-05 16:29:23,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461418186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:23,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580471284] [2021-06-05 16:29:23,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:23,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:29:23,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:23,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:23,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:23,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580471284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:23,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:23,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:29:23,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645576235] [2021-06-05 16:29:23,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:29:23,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:23,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:29:23,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:29:23,896 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) [2021-06-05 16:29:24,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:24,487 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-05 16:29:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:29:24,488 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 [2021-06-05 16:29:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:24,494 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 16:29:24,494 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 16:29:24,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:29:24,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 16:29:24,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-05 16:29:24,527 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) [2021-06-05 16:29:24,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-05 16:29:24,530 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-05 16:29:24,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:24,530 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-05 16:29:24,530 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) [2021-06-05 16:29:24,530 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-05 16:29:24,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:24,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:24,532 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:24,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 16:29:24,755 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:24,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:24,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-06-05 16:29:24,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:24,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297284520] [2021-06-05 16:29:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:24,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:24,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297284520] [2021-06-05 16:29:24,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297284520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:24,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745850280] [2021-06-05 16:29:24,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:24,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:29:24,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:24,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:24,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:24,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745850280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:24,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:24,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:29:24,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205304195] [2021-06-05 16:29:24,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:29:24,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:24,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:29:24,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:29:24,879 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) [2021-06-05 16:29:25,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:25,406 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-05 16:29:25,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:29:25,406 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 [2021-06-05 16:29:25,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:25,410 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 16:29:25,410 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 16:29:25,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 314.2ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:29:25,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 16:29:25,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-05 16:29:25,439 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) [2021-06-05 16:29:25,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-05 16:29:25,442 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-05 16:29:25,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:25,442 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-05 16:29:25,442 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) [2021-06-05 16:29:25,442 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-05 16:29:25,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:25,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:25,444 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:25,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:25,661 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:25,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-06-05 16:29:25,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:25,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940034864] [2021-06-05 16:29:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:25,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:25,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940034864] [2021-06-05 16:29:25,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940034864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:25,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331808506] [2021-06-05 16:29:25,707 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 [2021-06-05 16:29:25,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:29:25,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:25,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:25,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:25,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331808506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:25,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:25,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:29:25,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453306786] [2021-06-05 16:29:25,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:29:25,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:25,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:29:25,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:25,835 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) [2021-06-05 16:29:26,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:26,432 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-05 16:29:26,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:29:26,432 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 [2021-06-05 16:29:26,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:26,438 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 16:29:26,438 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 16:29:26,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:29:26,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 16:29:26,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-05 16:29:26,468 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) [2021-06-05 16:29:26,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-05 16:29:26,471 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-05 16:29:26,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:26,471 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-05 16:29:26,471 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) [2021-06-05 16:29:26,471 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-05 16:29:26,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:26,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:26,473 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:26,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 16:29:26,689 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:26,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:26,689 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-06-05 16:29:26,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:26,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641354150] [2021-06-05 16:29:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:26,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:26,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641354150] [2021-06-05 16:29:26,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641354150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:26,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762937114] [2021-06-05 16:29:26,729 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 [2021-06-05 16:29:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:26,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:26,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:26,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762937114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:26,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:26,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:29:26,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950634032] [2021-06-05 16:29:26,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:29:26,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:26,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:29:26,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:26,844 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) [2021-06-05 16:29:27,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:27,436 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-05 16:29:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:29:27,436 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 [2021-06-05 16:29:27,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:27,441 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 16:29:27,441 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 16:29:27,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 373.6ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:29:27,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 16:29:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-05 16:29:27,469 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) [2021-06-05 16:29:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-05 16:29:27,472 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-05 16:29:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:27,472 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-05 16:29:27,472 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) [2021-06-05 16:29:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-05 16:29:27,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:27,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:27,474 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:27,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 16:29:27,696 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:27,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:27,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-06-05 16:29:27,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:27,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581372136] [2021-06-05 16:29:27,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:29:27,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:27,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581372136] [2021-06-05 16:29:27,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581372136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:27,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274690094] [2021-06-05 16:29:27,722 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 [2021-06-05 16:29:27,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:29:27,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:27,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:29:27,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:29:27,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274690094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:27,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:27,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:29:27,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007283909] [2021-06-05 16:29:27,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:29:27,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:27,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:29:27,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:29:27,801 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) [2021-06-05 16:29:27,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:27,883 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-05 16:29:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:29:27,883 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 [2021-06-05 16:29:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:27,885 INFO L225 Difference]: With dead ends: 929 [2021-06-05 16:29:27,885 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 16:29:27,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:29:27,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 16:29:27,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-05 16:29:27,900 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) [2021-06-05 16:29:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-05 16:29:27,902 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-05 16:29:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:27,902 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-05 16:29:27,903 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) [2021-06-05 16:29:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-05 16:29:27,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:27,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:27,904 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:28,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:28,127 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:28,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:28,128 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-06-05 16:29:28,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:28,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285704652] [2021-06-05 16:29:28,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:28,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:28,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285704652] [2021-06-05 16:29:28,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285704652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:28,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616815723] [2021-06-05 16:29:28,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:28,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:29:28,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:28,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:28,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:28,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616815723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:28,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:28,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:29:28,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465113527] [2021-06-05 16:29:28,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:29:28,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:28,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:29:28,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:29:28,239 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) [2021-06-05 16:29:28,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:28,495 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-05 16:29:28,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:29:28,495 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 [2021-06-05 16:29:28,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:28,501 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 16:29:28,502 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 16:29:28,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:29:28,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 16:29:28,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-05 16:29:28,525 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) [2021-06-05 16:29:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-05 16:29:28,527 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-05 16:29:28,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:28,528 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-05 16:29:28,528 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) [2021-06-05 16:29:28,528 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-05 16:29:28,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:28,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:28,529 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:28,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 16:29:28,748 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:28,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-06-05 16:29:28,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:28,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143173928] [2021-06-05 16:29:28,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:28,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:28,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143173928] [2021-06-05 16:29:28,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143173928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:28,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394828999] [2021-06-05 16:29:28,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:28,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:29:28,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:28,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:28,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:28,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394828999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:28,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:28,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:29:28,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986349198] [2021-06-05 16:29:28,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:29:28,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:28,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:29:28,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:29:28,865 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) [2021-06-05 16:29:29,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:29,089 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-05 16:29:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:29:29,090 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 [2021-06-05 16:29:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:29,093 INFO L225 Difference]: With dead ends: 1605 [2021-06-05 16:29:29,093 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 16:29:29,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:29:29,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 16:29:29,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-05 16:29:29,111 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) [2021-06-05 16:29:29,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-05 16:29:29,113 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-05 16:29:29,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:29,113 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-05 16:29:29,113 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) [2021-06-05 16:29:29,113 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-05 16:29:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:29,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:29,115 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:29,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:29,329 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:29,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-06-05 16:29:29,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:29,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215155961] [2021-06-05 16:29:29,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:29:29,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:29,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215155961] [2021-06-05 16:29:29,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215155961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:29,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895653143] [2021-06-05 16:29:29,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:29,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:29:29,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:29,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:29,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:29:29,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895653143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:29,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:29,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:29:29,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102381242] [2021-06-05 16:29:29,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:29:29,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:29,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:29:29,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:29:29,452 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) [2021-06-05 16:29:29,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:29,643 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-05 16:29:29,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:29:29,644 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 [2021-06-05 16:29:29,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:29,646 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 16:29:29,646 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 16:29:29,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:29:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 16:29:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-05 16:29:29,665 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) [2021-06-05 16:29:29,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-05 16:29:29,667 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-05 16:29:29,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:29,668 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-05 16:29:29,668 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) [2021-06-05 16:29:29,668 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-05 16:29:29,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:29,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:29,670 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:29,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 16:29:29,885 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:29,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:29,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-06-05 16:29:29,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:29,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872522166] [2021-06-05 16:29:29,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:29,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:29,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872522166] [2021-06-05 16:29:29,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872522166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:29,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408896481] [2021-06-05 16:29:29,924 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:29,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:29:29,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:29,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:29,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:29,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408896481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:29,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:29,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:29:29,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774822492] [2021-06-05 16:29:29,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:29:29,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:29,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:29:29,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:29:29,998 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) [2021-06-05 16:29:30,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:30,230 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-05 16:29:30,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:29:30,230 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 [2021-06-05 16:29:30,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:30,233 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 16:29:30,233 INFO L226 Difference]: Without dead ends: 1496 [2021-06-05 16:29:30,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:29:30,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-05 16:29:30,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-05 16:29:30,247 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) [2021-06-05 16:29:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-05 16:29:30,250 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-05 16:29:30,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:30,250 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-05 16:29:30,250 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) [2021-06-05 16:29:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-05 16:29:30,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:30,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:30,252 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:30,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:30,454 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:30,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:30,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-06-05 16:29:30,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:30,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897264805] [2021-06-05 16:29:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:30,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:30,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897264805] [2021-06-05 16:29:30,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897264805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:30,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695484298] [2021-06-05 16:29:30,500 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 [2021-06-05 16:29:30,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:29:30,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:30,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:30,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:30,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695484298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:30,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:30,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:29:30,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514033168] [2021-06-05 16:29:30,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:29:30,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:30,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:29:30,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:30,614 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) [2021-06-05 16:29:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:31,113 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-05 16:29:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:29:31,113 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 [2021-06-05 16:29:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:31,118 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 16:29:31,118 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 16:29:31,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:29:31,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 16:29:31,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-05 16:29:31,142 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) [2021-06-05 16:29:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-05 16:29:31,145 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-05 16:29:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:31,145 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-05 16:29:31,145 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) [2021-06-05 16:29:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-05 16:29:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:31,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:31,147 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:31,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 16:29:31,369 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:31,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:31,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-06-05 16:29:31,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:31,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618368435] [2021-06-05 16:29:31,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:31,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:31,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618368435] [2021-06-05 16:29:31,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618368435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:31,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105035921] [2021-06-05 16:29:31,430 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 [2021-06-05 16:29:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:31,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:31,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:31,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105035921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:31,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:31,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:29:31,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133319260] [2021-06-05 16:29:31,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:29:31,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:31,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:29:31,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:31,540 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) [2021-06-05 16:29:31,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:31,996 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-05 16:29:31,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:29:31,996 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 [2021-06-05 16:29:31,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:32,004 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 16:29:32,004 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 16:29:32,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 309.5ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:29:32,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 16:29:32,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-05 16:29:32,026 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) [2021-06-05 16:29:32,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:29:32,029 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:29:32,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:32,029 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:29:32,029 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) [2021-06-05 16:29:32,029 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:29:32,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:32,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:32,031 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:32,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:32,245 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:32,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:32,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-06-05 16:29:32,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:32,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805072555] [2021-06-05 16:29:32,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:32,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:32,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805072555] [2021-06-05 16:29:32,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805072555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:32,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394264918] [2021-06-05 16:29:32,281 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 [2021-06-05 16:29:32,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:29:32,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:32,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:32,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:32,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394264918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:32,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:32,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:29:32,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496030391] [2021-06-05 16:29:32,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:29:32,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:32,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:29:32,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:29:32,371 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) [2021-06-05 16:29:32,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:32,807 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-05 16:29:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:29:32,813 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 [2021-06-05 16:29:32,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:32,817 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 16:29:32,817 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 16:29:32,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:29:32,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 16:29:32,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-05 16:29:32,840 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) [2021-06-05 16:29:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 16:29:32,842 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 16:29:32,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:32,843 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 16:29:32,843 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) [2021-06-05 16:29:32,843 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 16:29:32,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:32,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:32,844 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:33,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 16:29:33,061 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:33,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:33,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-06-05 16:29:33,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:33,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015596857] [2021-06-05 16:29:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:33,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:33,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015596857] [2021-06-05 16:29:33,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015596857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:33,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137364196] [2021-06-05 16:29:33,097 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 [2021-06-05 16:29:33,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:29:33,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:33,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:33,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:33,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137364196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:33,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:33,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:29:33,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106383631] [2021-06-05 16:29:33,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:29:33,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:33,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:29:33,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:29:33,231 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) [2021-06-05 16:29:33,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:33,641 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-05 16:29:33,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:29:33,642 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 [2021-06-05 16:29:33,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:33,645 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 16:29:33,645 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 16:29:33,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 268.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:29:33,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 16:29:33,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-05 16:29:33,666 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) [2021-06-05 16:29:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:29:33,668 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:29:33,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:33,668 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:29:33,668 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) [2021-06-05 16:29:33,668 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:29:33,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:33,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:33,670 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:33,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:33,892 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:33,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:33,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-06-05 16:29:33,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:33,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328066540] [2021-06-05 16:29:33,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:33,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:33,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328066540] [2021-06-05 16:29:33,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328066540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:33,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944425106] [2021-06-05 16:29:33,935 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 [2021-06-05 16:29:33,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:29:33,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:33,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:33,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:34,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944425106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:34,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:34,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:29:34,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621264805] [2021-06-05 16:29:34,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:29:34,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:34,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:29:34,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:34,037 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) [2021-06-05 16:29:34,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:34,378 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-05 16:29:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:29:34,378 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 [2021-06-05 16:29:34,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:34,381 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 16:29:34,382 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 16:29:34,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:29:34,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 16:29:34,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-05 16:29:34,402 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) [2021-06-05 16:29:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 16:29:34,404 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 16:29:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:34,404 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 16:29:34,404 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) [2021-06-05 16:29:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 16:29:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:34,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:34,406 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:34,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 16:29:34,606 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:34,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:34,606 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-06-05 16:29:34,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:34,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938159277] [2021-06-05 16:29:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:34,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:34,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938159277] [2021-06-05 16:29:34,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938159277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:34,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389778453] [2021-06-05 16:29:34,639 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 [2021-06-05 16:29:34,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:29:34,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:34,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:34,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:34,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389778453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:34,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:34,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:29:34,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779290595] [2021-06-05 16:29:34,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:29:34,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:34,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:29:34,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:34,730 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) [2021-06-05 16:29:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:35,097 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-05 16:29:35,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:29:35,098 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 [2021-06-05 16:29:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:35,100 INFO L225 Difference]: With dead ends: 2156 [2021-06-05 16:29:35,100 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 16:29:35,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:29:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 16:29:35,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-05 16:29:35,119 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) [2021-06-05 16:29:35,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:29:35,121 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:29:35,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:35,121 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:29:35,122 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) [2021-06-05 16:29:35,122 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:29:35,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:35,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:35,123 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:35,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 16:29:35,337 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:35,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:35,337 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-06-05 16:29:35,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:35,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731118181] [2021-06-05 16:29:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:35,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:35,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731118181] [2021-06-05 16:29:35,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731118181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:35,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124698131] [2021-06-05 16:29:35,381 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 [2021-06-05 16:29:35,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:29:35,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:35,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:35,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:35,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124698131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:35,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:35,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:29:35,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219024381] [2021-06-05 16:29:35,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:29:35,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:35,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:29:35,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:29:35,478 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) [2021-06-05 16:29:35,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:35,816 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-05 16:29:35,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:29:35,816 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 [2021-06-05 16:29:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:35,818 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 16:29:35,818 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 16:29:35,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 209.9ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:29:35,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 16:29:35,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-05 16:29:35,834 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) [2021-06-05 16:29:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-05 16:29:35,836 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-05 16:29:35,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:35,836 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-05 16:29:35,837 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) [2021-06-05 16:29:35,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-05 16:29:35,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:35,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:35,838 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:36,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 16:29:36,039 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:36,039 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-06-05 16:29:36,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:36,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721052833] [2021-06-05 16:29:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:36,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:36,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721052833] [2021-06-05 16:29:36,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721052833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:36,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070720595] [2021-06-05 16:29:36,074 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 [2021-06-05 16:29:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:36,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:36,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:36,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070720595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:36,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:36,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:29:36,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347860620] [2021-06-05 16:29:36,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:29:36,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:36,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:29:36,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:29:36,176 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) [2021-06-05 16:29:36,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:36,437 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-05 16:29:36,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:29:36,437 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 [2021-06-05 16:29:36,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:36,439 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 16:29:36,439 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 16:29:36,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:29:36,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 16:29:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-05 16:29:36,461 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) [2021-06-05 16:29:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-05 16:29:36,464 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-05 16:29:36,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:36,464 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-05 16:29:36,464 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) [2021-06-05 16:29:36,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-05 16:29:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:36,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:36,466 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:36,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 16:29:36,681 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:36,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:36,681 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-06-05 16:29:36,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:36,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039696971] [2021-06-05 16:29:36,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:36,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:36,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039696971] [2021-06-05 16:29:36,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039696971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:36,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832661455] [2021-06-05 16:29:36,713 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 [2021-06-05 16:29:36,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:29:36,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:36,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:36,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:36,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832661455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:36,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:36,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:29:36,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015032819] [2021-06-05 16:29:36,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:29:36,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:36,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:29:36,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:29:36,788 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) [2021-06-05 16:29:36,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:36,986 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-05 16:29:36,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:29:36,987 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 [2021-06-05 16:29:36,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:36,989 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 16:29:36,989 INFO L226 Difference]: Without dead ends: 1716 [2021-06-05 16:29:36,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:29:36,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-05 16:29:37,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-05 16:29:37,001 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) [2021-06-05 16:29:37,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-05 16:29:37,004 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-05 16:29:37,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:37,004 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-05 16:29:37,004 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) [2021-06-05 16:29:37,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-05 16:29:37,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:37,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:37,007 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:37,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:37,221 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:37,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:37,221 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-06-05 16:29:37,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:37,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807028143] [2021-06-05 16:29:37,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:37,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:37,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807028143] [2021-06-05 16:29:37,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807028143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:37,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466207505] [2021-06-05 16:29:37,254 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 [2021-06-05 16:29:37,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:29:37,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:37,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:37,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:37,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466207505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:37,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:37,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:29:37,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906909078] [2021-06-05 16:29:37,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:29:37,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:37,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:29:37,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:37,353 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) [2021-06-05 16:29:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:37,686 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-05 16:29:37,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:29:37,686 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 [2021-06-05 16:29:37,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:37,688 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 16:29:37,688 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 16:29:37,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:29:37,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 16:29:37,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-05 16:29:37,702 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) [2021-06-05 16:29:37,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-05 16:29:37,704 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-05 16:29:37,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:37,704 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-05 16:29:37,705 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) [2021-06-05 16:29:37,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-05 16:29:37,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:37,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:37,706 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:37,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:37,907 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:37,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:37,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-06-05 16:29:37,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:37,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312759780] [2021-06-05 16:29:37,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:37,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:37,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312759780] [2021-06-05 16:29:37,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312759780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:37,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467632893] [2021-06-05 16:29:37,941 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 [2021-06-05 16:29:37,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:29:37,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:37,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:37,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:38,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467632893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:38,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:38,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:29:38,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533374486] [2021-06-05 16:29:38,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:29:38,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:38,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:29:38,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:29:38,030 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) [2021-06-05 16:29:38,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:38,276 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-05 16:29:38,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:29:38,277 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 [2021-06-05 16:29:38,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:38,279 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 16:29:38,279 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 16:29:38,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:29:38,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 16:29:38,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-05 16:29:38,293 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) [2021-06-05 16:29:38,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-05 16:29:38,296 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-05 16:29:38,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:38,297 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-05 16:29:38,297 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) [2021-06-05 16:29:38,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-05 16:29:38,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:29:38,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:38,299 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:38,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-05 16:29:38,513 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:38,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:38,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-06-05 16:29:38,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:38,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822519485] [2021-06-05 16:29:38,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:38,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:38,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822519485] [2021-06-05 16:29:38,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822519485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:38,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970708653] [2021-06-05 16:29:38,549 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 [2021-06-05 16:29:38,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:29:38,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:38,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:29:38,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:38,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970708653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:38,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:38,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:29:38,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895224564] [2021-06-05 16:29:38,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:29:38,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:38,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:29:38,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:29:38,655 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) [2021-06-05 16:29:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:38,830 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-05 16:29:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:29:38,830 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 [2021-06-05 16:29:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:38,833 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 16:29:38,834 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 16:29:38,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:29:38,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 16:29:38,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-05 16:29:38,852 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) [2021-06-05 16:29:38,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-05 16:29:38,855 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-05 16:29:38,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:38,855 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-05 16:29:38,855 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) [2021-06-05 16:29:38,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-05 16:29:38,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:38,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:38,857 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:39,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:39,079 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:39,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:39,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-06-05 16:29:39,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:39,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118932064] [2021-06-05 16:29:39,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:39,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:39,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118932064] [2021-06-05 16:29:39,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118932064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:39,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037802740] [2021-06-05 16:29:39,512 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:39,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:29:39,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:39,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:29:39,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:40,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:40,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:29:40,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:40,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:40,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:29:40,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:40,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:40,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 16:29:40,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:40,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:40,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:29:40,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:40,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:40,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:29:40,104 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:40,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:40,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:29:40,112 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:40,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:40,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:29:40,119 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:40,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:40,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,128 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 [2021-06-05 16:29:40,129 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:40,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:40,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:29:40,136 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:40,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:40,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:29:40,143 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:40,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:40,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,150 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 21 treesize of output 13 [2021-06-05 16:29:40,151 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:40,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:40,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:29:40,160 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:40,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:40,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:29:40,167 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:40,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:40,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:29:40,174 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:40,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:40,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:40,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:29:40,180 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:40,202 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:29:40,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:29:40,204 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:29:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:40,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037802740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:40,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:40,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:29:40,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8410093] [2021-06-05 16:29:40,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:29:40,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:40,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:29:40,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:29:40,234 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) [2021-06-05 16:29:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:40,997 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-05 16:29:40,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:29:40,998 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 [2021-06-05 16:29:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:41,000 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 16:29:41,000 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 16:29:41,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1004.4ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:29:41,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 16:29:41,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-05 16:29:41,012 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) [2021-06-05 16:29:41,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-05 16:29:41,014 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-05 16:29:41,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:41,014 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-05 16:29:41,014 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) [2021-06-05 16:29:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-05 16:29:41,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:41,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:41,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:41,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:41,216 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:41,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:41,217 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-06-05 16:29:41,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:41,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887909580] [2021-06-05 16:29:41,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:41,520 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-06-05 16:29:41,751 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-06-05 16:29:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:41,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:41,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887909580] [2021-06-05 16:29:41,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887909580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:41,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431001690] [2021-06-05 16:29:41,789 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 [2021-06-05 16:29:41,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:29:41,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:41,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:29:41,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:42,261 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-06-05 16:29:42,313 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3], 2=[A, v_prenex_5]} [2021-06-05 16:29:42,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:42,318 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 [2021-06-05 16:29:42,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:42,464 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-05 16:29:42,465 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-06-05 16:29:42,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:42,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:42,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:29:42,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:42,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:42,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:42,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:42,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:29:42,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:42,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:42,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:29:42,534 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:15 [2021-06-05 16:29:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:42,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431001690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:42,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:42,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:29:42,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673815673] [2021-06-05 16:29:42,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:29:42,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:42,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:29:42,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:29:42,572 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) [2021-06-05 16:29:43,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:43,679 INFO L93 Difference]: Finished difference Result 1714 states and 5519 transitions. [2021-06-05 16:29:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:29:43,679 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 [2021-06-05 16:29:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:43,682 INFO L225 Difference]: With dead ends: 1714 [2021-06-05 16:29:43,682 INFO L226 Difference]: Without dead ends: 1684 [2021-06-05 16:29:43,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1453.2ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:29:43,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-06-05 16:29:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1168. [2021-06-05 16:29:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.348757497857755) internal successors, (3908), 1167 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3908 transitions. [2021-06-05 16:29:43,704 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3908 transitions. Word has length 26 [2021-06-05 16:29:43,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:43,704 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3908 transitions. [2021-06-05 16:29:43,704 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) [2021-06-05 16:29:43,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3908 transitions. [2021-06-05 16:29:43,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:43,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:43,706 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:43,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:43,913 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:43,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:43,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-06-05 16:29:43,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:43,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422287946] [2021-06-05 16:29:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:44,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:44,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422287946] [2021-06-05 16:29:44,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422287946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:44,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389923431] [2021-06-05 16:29:44,397 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 [2021-06-05 16:29:44,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:29:44,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:44,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:29:44,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:45,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,168 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 [2021-06-05 16:29:45,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:45,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:29:45,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:45,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,189 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 [2021-06-05 16:29:45,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:45,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,198 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 [2021-06-05 16:29:45,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:45,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,210 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 [2021-06-05 16:29:45,211 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:45,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:29:45,223 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:45,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,231 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 [2021-06-05 16:29:45,236 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:45,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,244 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 37 treesize of output 19 [2021-06-05 16:29:45,245 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:45,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,252 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 [2021-06-05 16:29:45,254 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:45,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,261 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 33 treesize of output 13 [2021-06-05 16:29:45,263 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:45,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,270 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 [2021-06-05 16:29:45,271 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:45,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,278 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 [2021-06-05 16:29:45,279 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:45,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:29:45,287 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:45,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,296 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 [2021-06-05 16:29:45,297 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:45,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:45,302 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 35 treesize of output 19 [2021-06-05 16:29:45,303 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:45,330 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:29:45,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:29:45,332 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:29:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:45,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389923431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:45,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:45,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:29:45,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281157211] [2021-06-05 16:29:45,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:29:45,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:45,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:29:45,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:29:45,359 INFO L87 Difference]: Start difference. First operand 1168 states and 3908 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) [2021-06-05 16:29:46,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:46,808 INFO L93 Difference]: Finished difference Result 1625 states and 5243 transitions. [2021-06-05 16:29:46,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:29:46,808 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 [2021-06-05 16:29:46,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:46,810 INFO L225 Difference]: With dead ends: 1625 [2021-06-05 16:29:46,810 INFO L226 Difference]: Without dead ends: 1610 [2021-06-05 16:29:46,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1644.5ms TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:29:46,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-06-05 16:29:46,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1198. [2021-06-05 16:29:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.3333333333333335) internal successors, (3990), 1197 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3990 transitions. [2021-06-05 16:29:46,826 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3990 transitions. Word has length 26 [2021-06-05 16:29:46,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:46,826 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 3990 transitions. [2021-06-05 16:29:46,826 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) [2021-06-05 16:29:46,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3990 transitions. [2021-06-05 16:29:46,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:46,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:46,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:47,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 16:29:47,028 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:47,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-06-05 16:29:47,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:47,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053460863] [2021-06-05 16:29:47,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:47,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:47,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053460863] [2021-06-05 16:29:47,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053460863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:47,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730140198] [2021-06-05 16:29:47,399 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 [2021-06-05 16:29:47,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:29:47,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:47,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:29:47,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:47,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,741 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:29:47,741 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 [2021-06-05 16:29:47,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:47,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:47,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:29:47,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:47,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,774 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:29:47,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:29:47,775 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:47,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:47,788 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 35 treesize of output 27 [2021-06-05 16:29:47,793 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:47,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:47,805 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 [2021-06-05 16:29:47,810 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:47,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,827 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:29:47,828 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 35 treesize of output 23 [2021-06-05 16:29:47,829 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:47,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,838 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:29:47,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:29:47,840 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:47,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,851 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:29:47,851 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 [2021-06-05 16:29:47,852 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:47,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,862 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:29:47,862 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 1 [2021-06-05 16:29:47,862 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:47,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,876 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:29:47,876 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 35 treesize of output 23 [2021-06-05 16:29:47,878 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:47,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,889 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:29:47,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:29:47,890 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:47,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,900 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:29:47,900 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 1 [2021-06-05 16:29:47,900 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:47,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,909 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:29:47,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:29:47,910 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:47,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,918 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:29:47,918 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 28 treesize of output 16 [2021-06-05 16:29:47,919 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:47,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,927 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:29:47,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:29:47,928 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:47,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,936 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:29:47,936 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 [2021-06-05 16:29:47,937 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:48,020 INFO L628 ElimStorePlain]: treesize reduction 16, result has 85.6 percent of original size [2021-06-05 16:29:48,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:29:48,021 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:95 [2021-06-05 16:29:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:48,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730140198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:48,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:48,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:29:48,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137275651] [2021-06-05 16:29:48,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:29:48,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:48,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:29:48,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:29:48,140 INFO L87 Difference]: Start difference. First operand 1198 states and 3990 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) [2021-06-05 16:29:49,667 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-05 16:29:49,838 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-06-05 16:29:49,993 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 16:29:50,145 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-06-05 16:29:50,343 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 16:29:50,810 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 16:29:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:51,106 INFO L93 Difference]: Finished difference Result 2145 states and 6707 transitions. [2021-06-05 16:29:51,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:29:51,107 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 [2021-06-05 16:29:51,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:51,109 INFO L225 Difference]: With dead ends: 2145 [2021-06-05 16:29:51,109 INFO L226 Difference]: Without dead ends: 2100 [2021-06-05 16:29:51,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 2758.7ms TimeCoverageRelationStatistics Valid=366, Invalid=2084, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:29:51,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-06-05 16:29:51,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1216. [2021-06-05 16:29:51,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 3.3390946502057615) internal successors, (4057), 1215 states have internal predecessors, (4057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 4057 transitions. [2021-06-05 16:29:51,127 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 4057 transitions. Word has length 26 [2021-06-05 16:29:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:51,127 INFO L482 AbstractCegarLoop]: Abstraction has 1216 states and 4057 transitions. [2021-06-05 16:29:51,127 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) [2021-06-05 16:29:51,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 4057 transitions. [2021-06-05 16:29:51,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:51,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:51,130 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:51,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:51,345 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:51,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:51,345 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-06-05 16:29:51,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:51,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782390167] [2021-06-05 16:29:51,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:51,732 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-05 16:29:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:51,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:51,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782390167] [2021-06-05 16:29:51,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782390167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:51,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612004927] [2021-06-05 16:29:51,840 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 [2021-06-05 16:29:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:51,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:29:51,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:52,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,560 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 [2021-06-05 16:29:52,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:52,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,574 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 [2021-06-05 16:29:52,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:52,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,583 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 [2021-06-05 16:29:52,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:52,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,594 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 41 treesize of output 16 [2021-06-05 16:29:52,595 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:52,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,605 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 [2021-06-05 16:29:52,606 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:52,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,616 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 [2021-06-05 16:29:52,617 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:52,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,626 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 [2021-06-05 16:29:52,626 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:52,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,635 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 [2021-06-05 16:29:52,636 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:52,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:29:52,649 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:52,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,659 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 [2021-06-05 16:29:52,660 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:52,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,669 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 [2021-06-05 16:29:52,670 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:52,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,678 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 [2021-06-05 16:29:52,679 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:52,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,687 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 35 treesize of output 19 [2021-06-05 16:29:52,688 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:52,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,696 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:29:52,697 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:52,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:29:52,704 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:52,726 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:29:52,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:29:52,727 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:29:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:52,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612004927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:52,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:52,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:29:52,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611861701] [2021-06-05 16:29:52,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:29:52,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:52,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:29:52,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:29:52,758 INFO L87 Difference]: Start difference. First operand 1216 states and 4057 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) [2021-06-05 16:29:53,946 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-06-05 16:29:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:55,674 INFO L93 Difference]: Finished difference Result 1915 states and 6096 transitions. [2021-06-05 16:29:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:29:55,675 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 [2021-06-05 16:29:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:55,677 INFO L225 Difference]: With dead ends: 1915 [2021-06-05 16:29:55,677 INFO L226 Difference]: Without dead ends: 1900 [2021-06-05 16:29:55,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 3042.4ms TimeCoverageRelationStatistics Valid=500, Invalid=2362, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:29:55,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2021-06-05 16:29:55,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1227. [2021-06-05 16:29:55,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 3.3450244698205545) internal successors, (4101), 1226 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 4101 transitions. [2021-06-05 16:29:55,693 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 4101 transitions. Word has length 26 [2021-06-05 16:29:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:55,693 INFO L482 AbstractCegarLoop]: Abstraction has 1227 states and 4101 transitions. [2021-06-05 16:29:55,693 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) [2021-06-05 16:29:55,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 4101 transitions. [2021-06-05 16:29:55,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:55,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:55,694 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:29:55,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:55,895 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:55,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:55,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-06-05 16:29:55,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:55,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477524209] [2021-06-05 16:29:55,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:56,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:56,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477524209] [2021-06-05 16:29:56,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477524209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:56,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009313162] [2021-06-05 16:29:56,253 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 [2021-06-05 16:29:56,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:29:56,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:56,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:29:56,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:57,019 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:29:57,019 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 [2021-06-05 16:29:57,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:57,102 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:29:57,102 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 16:29:57,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:57,140 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:29:57,140 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 33 treesize of output 1 [2021-06-05 16:29:57,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:57,185 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:29:57,186 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 47 [2021-06-05 16:29:57,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:57,249 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-06-05 16:29:57,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 32 [2021-06-05 16:29:57,253 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:57,271 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:29:57,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:29:57,272 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:57,335 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:29:57,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-06-05 16:29:57,344 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:57,395 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:29:57,395 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 [2021-06-05 16:29:57,422 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:57,463 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-06-05 16:29:57,464 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 32 [2021-06-05 16:29:57,466 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:57,508 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:29:57,509 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 16:29:57,530 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:57,580 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:29:57,580 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 28 treesize of output 40 [2021-06-05 16:29:57,588 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:57,626 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:29:57,627 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 26 treesize of output 40 [2021-06-05 16:29:57,633 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:57,653 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:29:57,653 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:29:57,654 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:57,671 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:29:57,671 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 31 treesize of output 1 [2021-06-05 16:29:57,672 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:57,707 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:29:57,708 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 40 [2021-06-05 16:29:57,716 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:57,746 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:29:57,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 40 [2021-06-05 16:29:57,751 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:58,060 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2021-06-05 16:29:58,061 INFO L628 ElimStorePlain]: treesize reduction 296, result has 49.5 percent of original size [2021-06-05 16:29:58,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:29:58,084 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:833, output treesize:341 [2021-06-05 16:29:58,377 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-06-05 16:29:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:58,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009313162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:58,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:58,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 16:29:58,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317026728] [2021-06-05 16:29:58,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:29:58,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:58,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:29:58,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:29:58,546 INFO L87 Difference]: Start difference. First operand 1227 states and 4101 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) [2021-06-05 16:30:00,009 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-06-05 16:30:00,233 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-06-05 16:30:00,660 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2021-06-05 16:30:01,023 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2021-06-05 16:30:01,470 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2021-06-05 16:30:01,757 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2021-06-05 16:30:01,988 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 16:30:02,303 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2021-06-05 16:30:02,677 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 57 [2021-06-05 16:30:02,861 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 37 [2021-06-05 16:30:03,023 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 16:30:03,300 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-06-05 16:30:03,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:03,391 INFO L93 Difference]: Finished difference Result 2515 states and 7728 transitions. [2021-06-05 16:30:03,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:30:03,391 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 [2021-06-05 16:30:03,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:03,395 INFO L225 Difference]: With dead ends: 2515 [2021-06-05 16:30:03,395 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 16:30:03,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 5125.8ms TimeCoverageRelationStatistics Valid=695, Invalid=3727, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:30:03,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 16:30:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 1399. [2021-06-05 16:30:03,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.3125894134477827) internal successors, (4631), 1398 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4631 transitions. [2021-06-05 16:30:03,423 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4631 transitions. Word has length 26 [2021-06-05 16:30:03,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:03,424 INFO L482 AbstractCegarLoop]: Abstraction has 1399 states and 4631 transitions. [2021-06-05 16:30:03,424 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) [2021-06-05 16:30:03,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4631 transitions. [2021-06-05 16:30:03,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:03,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:03,426 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:30:03,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-06-05 16:30:03,626 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:03,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:03,626 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-06-05 16:30:03,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:03,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924375551] [2021-06-05 16:30:03,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:04,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:04,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924375551] [2021-06-05 16:30:04,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924375551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:04,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381159337] [2021-06-05 16:30:04,052 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 [2021-06-05 16:30:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:04,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:30:04,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:04,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:04,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:04,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:04,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:04,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,522 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:30:04,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:04,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:04,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:04,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:04,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:04,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:30:04,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:04,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:04,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:30:04,547 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:04,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:04,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,554 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 [2021-06-05 16:30:04,555 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:04,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:04,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:04,562 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:04,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:04,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:30:04,571 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:04,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:04,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,578 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:30:04,578 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:04,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:04,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:04,586 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:04,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:04,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:04,592 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:04,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:04,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:04,598 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:04,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:04,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,604 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 33 treesize of output 19 [2021-06-05 16:30:04,605 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:04,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:04,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:30:04,610 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:04,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:04,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:04,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:30:04,614 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:04,634 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:30:04,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:30:04,635 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:30:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:04,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381159337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:04,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:04,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:30:04,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646689750] [2021-06-05 16:30:04,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:30:04,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:04,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:30:04,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:30:04,660 INFO L87 Difference]: Start difference. First operand 1399 states and 4631 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) [2021-06-05 16:30:05,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:05,492 INFO L93 Difference]: Finished difference Result 1804 states and 5851 transitions. [2021-06-05 16:30:05,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:30:05,493 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 [2021-06-05 16:30:05,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:05,496 INFO L225 Difference]: With dead ends: 1804 [2021-06-05 16:30:05,496 INFO L226 Difference]: Without dead ends: 1789 [2021-06-05 16:30:05,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1153.0ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:30:05,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2021-06-05 16:30:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1410. [2021-06-05 16:30:05,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.3101490418736694) internal successors, (4664), 1409 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:05,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4664 transitions. [2021-06-05 16:30:05,516 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4664 transitions. Word has length 26 [2021-06-05 16:30:05,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:05,516 INFO L482 AbstractCegarLoop]: Abstraction has 1410 states and 4664 transitions. [2021-06-05 16:30:05,516 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) [2021-06-05 16:30:05,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4664 transitions. [2021-06-05 16:30:05,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:05,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:05,518 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:30:05,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-05 16:30:05,719 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:05,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:05,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-06-05 16:30:05,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:05,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617711009] [2021-06-05 16:30:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:06,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:06,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617711009] [2021-06-05 16:30:06,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617711009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:06,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961110477] [2021-06-05 16:30:06,245 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 [2021-06-05 16:30:06,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:30:06,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:30:06,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:30:06,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:06,635 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-05 16:30:06,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:06,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 [2021-06-05 16:30:06,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:06,798 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:30:06,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 [2021-06-05 16:30:06,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:07,130 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 125 [2021-06-05 16:30:07,131 INFO L628 ElimStorePlain]: treesize reduction 146, result has 72.2 percent of original size [2021-06-05 16:30:07,154 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:30:07,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 24 [2021-06-05 16:30:07,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:07,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:07,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:30:07,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:07,466 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 123 [2021-06-05 16:30:07,466 INFO L628 ElimStorePlain]: treesize reduction 31, result has 91.5 percent of original size [2021-06-05 16:30:07,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:07,483 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 16:30:07,487 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:07,613 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 16:30:07,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:07,631 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:30:07,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:30:07,633 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:07,755 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 16:30:07,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:07,776 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:30:07,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:30:07,792 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:07,909 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 16:30:07,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:07,932 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:30:07,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:30:07,938 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:08,056 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 16:30:08,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:08,081 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:30:08,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:30:08,083 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:08,196 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 16:30:08,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:08,214 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:30:08,214 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 28 treesize of output 24 [2021-06-05 16:30:08,215 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:08,322 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:30:08,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:08,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:30:08,337 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:563, output treesize:331 [2021-06-05 16:30:08,507 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-06-05 16:30:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:08,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961110477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:08,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:08,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:30:08,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682624826] [2021-06-05 16:30:08,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:30:08,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:08,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:30:08,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:30:08,559 INFO L87 Difference]: Start difference. First operand 1410 states and 4664 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) [2021-06-05 16:30:09,441 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2021-06-05 16:30:10,033 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 16:30:10,250 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-06-05 16:30:10,633 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-05 16:30:10,962 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 16:30:11,376 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-06-05 16:30:11,849 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-06-05 16:30:11,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:11,991 INFO L93 Difference]: Finished difference Result 2138 states and 6778 transitions. [2021-06-05 16:30:11,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:30:11,991 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 [2021-06-05 16:30:11,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:11,994 INFO L225 Difference]: With dead ends: 2138 [2021-06-05 16:30:11,994 INFO L226 Difference]: Without dead ends: 2108 [2021-06-05 16:30:11,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 3746.7ms TimeCoverageRelationStatistics Valid=295, Invalid=1685, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:30:11,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-06-05 16:30:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1416. [2021-06-05 16:30:12,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.3123674911660776) internal successors, (4687), 1415 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:12,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4687 transitions. [2021-06-05 16:30:12,013 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4687 transitions. Word has length 26 [2021-06-05 16:30:12,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:12,013 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 4687 transitions. [2021-06-05 16:30:12,013 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) [2021-06-05 16:30:12,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4687 transitions. [2021-06-05 16:30:12,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:12,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:12,015 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:30:12,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 16:30:12,216 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:12,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:12,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-06-05 16:30:12,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:12,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790067635] [2021-06-05 16:30:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:12,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:12,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790067635] [2021-06-05 16:30:12,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790067635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:12,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630418275] [2021-06-05 16:30:12,468 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:30:12,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:30:12,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:30:12,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:30:12,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:13,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:13,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:13,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:13,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:13,335 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-05 16:30:13,336 INFO L628 ElimStorePlain]: treesize reduction 130, result has 44.0 percent of original size [2021-06-05 16:30:13,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:13,340 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 23 treesize of output 13 [2021-06-05 16:30:13,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:13,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:13,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:13,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:13,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:13,377 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:13,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:13,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:13,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:13,409 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 21 treesize of output 13 [2021-06-05 16:30:13,411 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:13,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:13,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:30:13,436 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:29 [2021-06-05 16:30:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:13,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630418275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:13,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:13,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:30:13,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873242806] [2021-06-05 16:30:13,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:30:13,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:13,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:30:13,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:30:13,469 INFO L87 Difference]: Start difference. First operand 1416 states and 4687 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) [2021-06-05 16:30:14,063 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2021-06-05 16:30:14,308 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 16:30:14,481 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-06-05 16:30:14,841 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2021-06-05 16:30:15,023 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-06-05 16:30:15,304 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 84 [2021-06-05 16:30:15,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:15,411 INFO L93 Difference]: Finished difference Result 2242 states and 7149 transitions. [2021-06-05 16:30:15,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:30:15,411 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 [2021-06-05 16:30:15,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:15,414 INFO L225 Difference]: With dead ends: 2242 [2021-06-05 16:30:15,414 INFO L226 Difference]: Without dead ends: 2212 [2021-06-05 16:30:15,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2141.0ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:30:15,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-05 16:30:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1446. [2021-06-05 16:30:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.322491349480969) internal successors, (4801), 1445 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4801 transitions. [2021-06-05 16:30:15,436 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4801 transitions. Word has length 26 [2021-06-05 16:30:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:15,437 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4801 transitions. [2021-06-05 16:30:15,437 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) [2021-06-05 16:30:15,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4801 transitions. [2021-06-05 16:30:15,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:15,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:15,439 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:30:15,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 16:30:15,639 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:15,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:15,639 INFO L82 PathProgramCache]: Analyzing trace with hash 937111779, now seen corresponding path program 10 times [2021-06-05 16:30:15,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:15,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957878510] [2021-06-05 16:30:15,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:15,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:15,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957878510] [2021-06-05 16:30:15,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957878510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:15,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970647096] [2021-06-05 16:30:15,909 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 [2021-06-05 16:30:15,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:30:15,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:30:15,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:30:15,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:16,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:16,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:30:16,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:16,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:16,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:16,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:16,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:16,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:16,363 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:16,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:16,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:16,370 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:16,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:16,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:16,382 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:16,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:16,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:16,390 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:16,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:16,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:30:16,396 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:16,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:16,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:16,404 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:16,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:16,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,410 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:30:16,410 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:16,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:16,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,415 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:30:16,416 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:16,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:16,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:16,422 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:16,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:16,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:30:16,428 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:16,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:16,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,434 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 28 treesize of output 16 [2021-06-05 16:30:16,435 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:16,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:16,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,439 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:30:16,440 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:16,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:16,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:16,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:30:16,444 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:16,463 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:30:16,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:30:16,464 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:30:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:16,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970647096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:16,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:16,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:30:16,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480058415] [2021-06-05 16:30:16,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:30:16,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:16,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:30:16,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:30:16,493 INFO L87 Difference]: Start difference. First operand 1446 states and 4801 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) [2021-06-05 16:30:17,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:17,077 INFO L93 Difference]: Finished difference Result 1753 states and 5743 transitions. [2021-06-05 16:30:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:30:17,078 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 [2021-06-05 16:30:17,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:17,080 INFO L225 Difference]: With dead ends: 1753 [2021-06-05 16:30:17,081 INFO L226 Difference]: Without dead ends: 1738 [2021-06-05 16:30:17,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 695.9ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:30:17,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-06-05 16:30:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1455. [2021-06-05 16:30:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 3.3266850068775793) internal successors, (4837), 1454 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:17,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 4837 transitions. [2021-06-05 16:30:17,098 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 4837 transitions. Word has length 26 [2021-06-05 16:30:17,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:17,098 INFO L482 AbstractCegarLoop]: Abstraction has 1455 states and 4837 transitions. [2021-06-05 16:30:17,098 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) [2021-06-05 16:30:17,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 4837 transitions. [2021-06-05 16:30:17,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:17,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:17,100 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:30:17,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:30:17,301 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:17,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:17,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1130404249, now seen corresponding path program 11 times [2021-06-05 16:30:17,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:17,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829956300] [2021-06-05 16:30:17,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:17,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:17,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829956300] [2021-06-05 16:30:17,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829956300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:17,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187525821] [2021-06-05 16:30:17,553 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 [2021-06-05 16:30:17,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:30:17,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:30:17,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:30:17,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:18,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:18,029 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:30:18,030 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 20 [2021-06-05 16:30:18,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:18,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:18,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:18,042 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 24 [2021-06-05 16:30:18,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:18,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:18,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:18,054 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 16 treesize of output 18 [2021-06-05 16:30:18,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:18,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:18,069 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:30:18,070 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 [2021-06-05 16:30:18,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:18,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:18,080 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:18,081 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 [2021-06-05 16:30:18,081 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:18,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:18,090 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:18,090 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 [2021-06-05 16:30:18,091 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:18,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:18,099 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:18,099 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 33 treesize of output 19 [2021-06-05 16:30:18,100 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:18,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:18,112 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:30:18,112 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 20 [2021-06-05 16:30:18,113 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:18,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:18,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:18,124 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 24 [2021-06-05 16:30:18,128 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:18,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:18,137 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:18,137 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 [2021-06-05 16:30:18,137 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:18,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:18,146 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:18,146 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 [2021-06-05 16:30:18,147 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:18,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:18,156 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:18,156 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 1 [2021-06-05 16:30:18,157 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:18,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:18,165 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:18,165 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 33 treesize of output 19 [2021-06-05 16:30:18,166 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:18,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:18,174 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:18,174 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 [2021-06-05 16:30:18,175 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:18,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:18,183 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:18,183 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 28 treesize of output 16 [2021-06-05 16:30:18,183 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:18,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:18,191 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:30:18,191 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 [2021-06-05 16:30:18,193 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:18,290 INFO L628 ElimStorePlain]: treesize reduction 24, result has 82.5 percent of original size [2021-06-05 16:30:18,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:30:18,293 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:91 [2021-06-05 16:30:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:18,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187525821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:18,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:18,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:30:18,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877313037] [2021-06-05 16:30:18,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:30:18,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:18,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:30:18,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:30:18,386 INFO L87 Difference]: Start difference. First operand 1455 states and 4837 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) [2021-06-05 16:30:19,313 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-06-05 16:30:19,744 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-06-05 16:30:19,937 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-05 16:30:20,156 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-06-05 16:30:20,760 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-06-05 16:30:20,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:20,941 INFO L93 Difference]: Finished difference Result 2493 states and 7968 transitions. [2021-06-05 16:30:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:30:20,941 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 [2021-06-05 16:30:20,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:20,945 INFO L225 Difference]: With dead ends: 2493 [2021-06-05 16:30:20,945 INFO L226 Difference]: Without dead ends: 2463 [2021-06-05 16:30:20,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 2434.9ms TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:30:20,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-06-05 16:30:20,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1468. [2021-06-05 16:30:20,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.3340149965916837) internal successors, (4891), 1467 states have internal predecessors, (4891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4891 transitions. [2021-06-05 16:30:20,969 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4891 transitions. Word has length 26 [2021-06-05 16:30:20,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:20,969 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 4891 transitions. [2021-06-05 16:30:20,969 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) [2021-06-05 16:30:20,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4891 transitions. [2021-06-05 16:30:20,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:20,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:20,971 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:30:21,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-06-05 16:30:21,171 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:21,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:21,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1627125609, now seen corresponding path program 12 times [2021-06-05 16:30:21,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:21,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204469738] [2021-06-05 16:30:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:21,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:21,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204469738] [2021-06-05 16:30:21,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204469738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:21,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768689803] [2021-06-05 16:30:21,515 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 [2021-06-05 16:30:21,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:30:21,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:30:21,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:30:21,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:21,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:21,782 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 27 [2021-06-05 16:30:21,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:21,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,797 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:21,797 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 1 [2021-06-05 16:30:21,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:21,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:21,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:30:21,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:21,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,834 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:21,835 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 39 treesize of output 19 [2021-06-05 16:30:21,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:21,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,866 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:21,866 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 [2021-06-05 16:30:21,866 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:21,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,877 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:21,877 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 [2021-06-05 16:30:21,878 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:21,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,891 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:21,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:30:21,891 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:21,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,906 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:30:21,906 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 20 [2021-06-05 16:30:21,908 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:21,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,920 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:21,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:30:21,921 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:21,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,934 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:21,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-06-05 16:30:21,935 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:21,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,947 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:21,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 19 [2021-06-05 16:30:21,948 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:21,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,959 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:21,959 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 [2021-06-05 16:30:21,960 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:21,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,972 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:21,972 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 16 [2021-06-05 16:30:21,974 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:21,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,987 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:21,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16 [2021-06-05 16:30:21,988 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:21,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:21,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:21,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:22,015 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:30:22,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:30:22,018 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:22,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:22,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:22,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:22,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:22,028 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:22,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-06-05 16:30:22,029 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:22,101 INFO L628 ElimStorePlain]: treesize reduction 19, result has 82.2 percent of original size [2021-06-05 16:30:22,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:30:22,102 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:689, output treesize:88 [2021-06-05 16:30:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:22,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768689803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:22,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:22,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:30:22,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121787653] [2021-06-05 16:30:22,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:30:22,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:22,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:30:22,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:30:22,201 INFO L87 Difference]: Start difference. First operand 1468 states and 4891 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) [2021-06-05 16:30:23,433 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-05 16:30:23,852 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-06-05 16:30:23,969 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 16:30:24,331 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-06-05 16:30:24,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:24,724 INFO L93 Difference]: Finished difference Result 2313 states and 7429 transitions. [2021-06-05 16:30:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:30:24,725 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 [2021-06-05 16:30:24,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:24,728 INFO L225 Difference]: With dead ends: 2313 [2021-06-05 16:30:24,728 INFO L226 Difference]: Without dead ends: 2283 [2021-06-05 16:30:24,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2455.9ms TimeCoverageRelationStatistics Valid=388, Invalid=1868, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:30:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2021-06-05 16:30:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 1477. [2021-06-05 16:30:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.3401084010840107) internal successors, (4930), 1476 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:24,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4930 transitions. [2021-06-05 16:30:24,748 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4930 transitions. Word has length 26 [2021-06-05 16:30:24,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:24,748 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 4930 transitions. [2021-06-05 16:30:24,748 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) [2021-06-05 16:30:24,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4930 transitions. [2021-06-05 16:30:24,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:24,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:24,750 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:30:24,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-05 16:30:24,951 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:24,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:24,951 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-06-05 16:30:24,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:24,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593238453] [2021-06-05 16:30:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:25,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:25,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593238453] [2021-06-05 16:30:25,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593238453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:25,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938101048] [2021-06-05 16:30:25,283 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 [2021-06-05 16:30:25,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:30:25,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:30:25,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:30:25,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:25,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,840 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 [2021-06-05 16:30:25,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:25,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,849 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 [2021-06-05 16:30:25,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:25,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,857 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 19 [2021-06-05 16:30:25,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:25,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,865 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 [2021-06-05 16:30:25,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:25,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:30:25,873 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:25,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,881 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 [2021-06-05 16:30:25,881 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:25,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,889 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 [2021-06-05 16:30:25,889 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:25,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,897 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 41 treesize of output 13 [2021-06-05 16:30:25,897 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:25,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:30:25,905 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:25,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,912 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 32 treesize of output 16 [2021-06-05 16:30:25,913 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:25,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,920 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 35 treesize of output 19 [2021-06-05 16:30:25,920 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:25,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,927 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 [2021-06-05 16:30:25,928 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:25,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,935 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 16:30:25,935 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:25,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 16:30:25,943 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:25,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:25,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:25,946 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 [2021-06-05 16:30:25,947 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:25,966 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:30:25,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:30:25,967 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:30:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:25,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938101048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:25,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:25,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 16:30:25,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000795120] [2021-06-05 16:30:25,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:30:25,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:25,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:30:25,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:30:25,997 INFO L87 Difference]: Start difference. First operand 1477 states and 4930 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) [2021-06-05 16:30:26,765 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-05 16:30:27,257 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 16:30:27,896 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-05 16:30:29,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:29,200 INFO L93 Difference]: Finished difference Result 3323 states and 10316 transitions. [2021-06-05 16:30:29,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:30:29,201 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 [2021-06-05 16:30:29,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:29,205 INFO L225 Difference]: With dead ends: 3323 [2021-06-05 16:30:29,205 INFO L226 Difference]: Without dead ends: 3278 [2021-06-05 16:30:29,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 2918.0ms TimeCoverageRelationStatistics Valid=670, Invalid=3362, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:30:29,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3278 states. [2021-06-05 16:30:29,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3278 to 1496. [2021-06-05 16:30:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.3578595317725752) internal successors, (5020), 1495 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:29,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5020 transitions. [2021-06-05 16:30:29,230 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5020 transitions. Word has length 26 [2021-06-05 16:30:29,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:29,230 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 5020 transitions. [2021-06-05 16:30:29,231 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) [2021-06-05 16:30:29,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5020 transitions. [2021-06-05 16:30:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:29,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:29,233 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:30:29,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:30:29,433 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:29,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:29,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-06-05 16:30:29,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:29,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895212423] [2021-06-05 16:30:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:29,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:29,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895212423] [2021-06-05 16:30:29,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895212423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:29,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414424935] [2021-06-05 16:30:29,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:30:29,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:30:29,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:30:29,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:30:29,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:30,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:30,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,351 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 [2021-06-05 16:30:30,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:30,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:30,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,358 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 [2021-06-05 16:30:30,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:30,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:30,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,365 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 [2021-06-05 16:30:30,366 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:30,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:30,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,372 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 [2021-06-05 16:30:30,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:30,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:30,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,380 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 39 treesize of output 13 [2021-06-05 16:30:30,381 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:30,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:30,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,388 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 [2021-06-05 16:30:30,388 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:30,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:30,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,395 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 [2021-06-05 16:30:30,396 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:30,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:30,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,403 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 [2021-06-05 16:30:30,403 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:30,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:30,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,410 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 [2021-06-05 16:30:30,411 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:30,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:30,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,418 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 35 treesize of output 19 [2021-06-05 16:30:30,418 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:30,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:30,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,424 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 [2021-06-05 16:30:30,425 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:30,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:30,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,432 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 [2021-06-05 16:30:30,433 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:30,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:30,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,439 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 [2021-06-05 16:30:30,440 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:30,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:30,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,446 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 35 treesize of output 19 [2021-06-05 16:30:30,447 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:30,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:30,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:30,450 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 41 treesize of output 16 [2021-06-05 16:30:30,451 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:30,470 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:30:30,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:30:30,471 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:30:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:30,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414424935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:30,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:30,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 16:30:30,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926695269] [2021-06-05 16:30:30,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:30:30,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:30,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:30:30,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:30:30,501 INFO L87 Difference]: Start difference. First operand 1496 states and 5020 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) [2021-06-05 16:30:30,960 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-05 16:30:31,385 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 16:30:31,924 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-05 16:30:32,519 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-06-05 16:30:33,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:33,484 INFO L93 Difference]: Finished difference Result 3094 states and 9789 transitions. [2021-06-05 16:30:33,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:30:33,484 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 [2021-06-05 16:30:33,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:33,488 INFO L225 Difference]: With dead ends: 3094 [2021-06-05 16:30:33,488 INFO L226 Difference]: Without dead ends: 3049 [2021-06-05 16:30:33,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 2817.6ms TimeCoverageRelationStatistics Valid=602, Invalid=2704, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:30:33,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-06-05 16:30:33,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 1496. [2021-06-05 16:30:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.3585284280936456) internal successors, (5021), 1495 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:33,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5021 transitions. [2021-06-05 16:30:33,513 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5021 transitions. Word has length 26 [2021-06-05 16:30:33,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:33,513 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 5021 transitions. [2021-06-05 16:30:33,513 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) [2021-06-05 16:30:33,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5021 transitions. [2021-06-05 16:30:33,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:33,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:33,515 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:30:33,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable808,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:30:33,716 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:33,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:33,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-06-05 16:30:33,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:33,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201354206] [2021-06-05 16:30:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:34,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:34,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201354206] [2021-06-05 16:30:34,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201354206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:34,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129647353] [2021-06-05 16:30:34,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:30:34,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:30:34,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:30:34,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:30:34,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:34,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,623 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:30:34,623 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 [2021-06-05 16:30:34,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:34,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,657 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-05 16:30:34,658 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 28 [2021-06-05 16:30:34,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:34,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,692 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:30:34,692 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 [2021-06-05 16:30:34,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:34,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,743 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:30:34,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:30:34,744 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:34,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,765 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:30:34,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:30:34,767 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:34,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,788 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:30:34,788 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 [2021-06-05 16:30:34,789 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:34,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,828 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 16:30:34,828 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 25 [2021-06-05 16:30:34,830 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:34,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:34,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:30:34,879 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:34,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,903 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:30:34,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-05 16:30:34,905 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:34,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,920 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:30:34,921 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 [2021-06-05 16:30:34,921 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:34,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,944 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-05 16:30:34,944 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 [2021-06-05 16:30:34,945 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:34,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,960 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:30:34,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:30:34,961 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,989 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:30:34,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:30:34,990 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:34,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:34,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:35,006 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:30:35,006 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 [2021-06-05 16:30:35,007 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:35,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:35,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:35,021 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:30:35,021 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 [2021-06-05 16:30:35,021 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:35,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:35,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:35,030 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:30:35,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:30:35,030 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:35,115 INFO L628 ElimStorePlain]: treesize reduction 52, result has 64.1 percent of original size [2021-06-05 16:30:35,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:30:35,117 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-06-05 16:30:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:35,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129647353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:35,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:35,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 16:30:35,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397168285] [2021-06-05 16:30:35,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:30:35,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:35,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:30:35,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:30:35,198 INFO L87 Difference]: Start difference. First operand 1496 states and 5021 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) [2021-06-05 16:30:36,041 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-05 16:30:36,596 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-06-05 16:30:37,189 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-05 16:30:37,905 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-05 16:30:38,056 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2021-06-05 16:30:38,301 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-06-05 16:30:38,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:38,858 INFO L93 Difference]: Finished difference Result 3560 states and 11117 transitions. [2021-06-05 16:30:38,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:30:38,859 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 [2021-06-05 16:30:38,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:38,864 INFO L225 Difference]: With dead ends: 3560 [2021-06-05 16:30:38,864 INFO L226 Difference]: Without dead ends: 3500 [2021-06-05 16:30:38,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 3288.0ms TimeCoverageRelationStatistics Valid=813, Invalid=3347, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:30:38,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-06-05 16:30:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 1512. [2021-06-05 16:30:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.370615486432826) internal successors, (5093), 1511 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5093 transitions. [2021-06-05 16:30:38,890 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5093 transitions. Word has length 26 [2021-06-05 16:30:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:38,891 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5093 transitions. [2021-06-05 16:30:38,891 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) [2021-06-05 16:30:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5093 transitions. [2021-06-05 16:30:38,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:38,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:38,893 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:30:39,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:30:39,093 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:39,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:39,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 13 times [2021-06-05 16:30:39,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:39,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020940238] [2021-06-05 16:30:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:39,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:39,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020940238] [2021-06-05 16:30:39,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020940238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:39,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411573813] [2021-06-05 16:30:39,456 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 [2021-06-05 16:30:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:39,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:30:39,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:39,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:39,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:30:39,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:39,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:39,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:30:39,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:39,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:39,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:30:39,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:39,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:39,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:39,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:39,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:39,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:39,878 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:39,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:39,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:39,884 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:39,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:39,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,889 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:30:39,889 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:39,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:39,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:30:39,895 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:39,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:39,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:39,903 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:39,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:39,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:30:39,910 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:39,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:39,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:39,918 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:39,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:39,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:30:39,923 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:39,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:39,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:30:39,928 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:39,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:39,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:39,933 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:39,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:39,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:39,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:39,937 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:39,956 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-06-05 16:30:39,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:30:39,958 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:30:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:39,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411573813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:39,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:39,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:30:39,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480526938] [2021-06-05 16:30:39,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:30:39,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:39,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:30:39,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:30:39,982 INFO L87 Difference]: Start difference. First operand 1512 states and 5093 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) [2021-06-05 16:30:40,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:40,622 INFO L93 Difference]: Finished difference Result 1895 states and 6252 transitions. [2021-06-05 16:30:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:30:40,622 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 [2021-06-05 16:30:40,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:40,624 INFO L225 Difference]: With dead ends: 1895 [2021-06-05 16:30:40,625 INFO L226 Difference]: Without dead ends: 1880 [2021-06-05 16:30:40,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 895.0ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:30:40,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-06-05 16:30:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1520. [2021-06-05 16:30:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.366688610928242) internal successors, (5114), 1519 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 5114 transitions. [2021-06-05 16:30:40,650 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 5114 transitions. Word has length 26 [2021-06-05 16:30:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:40,651 INFO L482 AbstractCegarLoop]: Abstraction has 1520 states and 5114 transitions. [2021-06-05 16:30:40,651 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) [2021-06-05 16:30:40,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 5114 transitions. [2021-06-05 16:30:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:40,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:40,654 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:30:40,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1025 [2021-06-05 16:30:40,877 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:40,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:40,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1195907103, now seen corresponding path program 14 times [2021-06-05 16:30:40,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:40,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722835487] [2021-06-05 16:30:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:41,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:41,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722835487] [2021-06-05 16:30:41,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722835487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:41,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75112599] [2021-06-05 16:30:41,233 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 [2021-06-05 16:30:41,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:30:41,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:30:41,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:30:41,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:41,615 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:30:41,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:30:41,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:41,626 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:30:41,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:30:41,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:41,636 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:30:41,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:30:41,637 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:41,646 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:30:41,646 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 33 treesize of output 19 [2021-06-05 16:30:41,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:41,662 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:30:41,662 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:30:41,663 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:41,672 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:30:41,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:30:41,673 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:41,692 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:30:41,692 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 16:30:41,694 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:41,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:41,709 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 16:30:41,714 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:41,734 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:30:41,734 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 16:30:41,752 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:41,762 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:30:41,763 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 28 treesize of output 16 [2021-06-05 16:30:41,763 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:41,784 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:30:41,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:30:41,786 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:41,797 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:30:41,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:30:41,797 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:41,810 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:30:41,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 19 [2021-06-05 16:30:41,811 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:41,821 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:30:41,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 1 [2021-06-05 16:30:41,829 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:41,840 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:30:41,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:30:41,841 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:41,848 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:30:41,848 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 30 treesize of output 1 [2021-06-05 16:30:41,848 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:41,972 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-06-05 16:30:41,973 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.4 percent of original size [2021-06-05 16:30:41,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:30:41,976 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:697, output treesize:177 [2021-06-05 16:30:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:42,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75112599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:42,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:42,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 16:30:42,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538363296] [2021-06-05 16:30:42,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:30:42,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:42,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:30:42,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:30:42,210 INFO L87 Difference]: Start difference. First operand 1520 states and 5114 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) [2021-06-05 16:30:43,063 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-06-05 16:30:43,256 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-06-05 16:30:43,483 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2021-06-05 16:30:43,902 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 16:30:44,046 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 16:30:44,530 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 16:30:44,932 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-06-05 16:30:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:45,136 INFO L93 Difference]: Finished difference Result 2084 states and 6791 transitions. [2021-06-05 16:30:45,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:30:45,136 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 [2021-06-05 16:30:45,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:45,139 INFO L225 Difference]: With dead ends: 2084 [2021-06-05 16:30:45,139 INFO L226 Difference]: Without dead ends: 2069 [2021-06-05 16:30:45,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 2976.6ms TimeCoverageRelationStatistics Valid=323, Invalid=1839, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:30:45,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-06-05 16:30:45,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1516. [2021-06-05 16:30:45,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.3755775577557756) internal successors, (5114), 1515 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 5114 transitions. [2021-06-05 16:30:45,158 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 5114 transitions. Word has length 26 [2021-06-05 16:30:45,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:45,158 INFO L482 AbstractCegarLoop]: Abstraction has 1516 states and 5114 transitions. [2021-06-05 16:30:45,158 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) [2021-06-05 16:30:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 5114 transitions. [2021-06-05 16:30:45,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:45,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:45,160 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:30:45,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1067 [2021-06-05 16:30:45,362 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:45,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:45,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1175939077, now seen corresponding path program 15 times [2021-06-05 16:30:45,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:45,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677758975] [2021-06-05 16:30:45,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:45,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:45,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677758975] [2021-06-05 16:30:45,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677758975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:45,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826222906] [2021-06-05 16:30:45,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:30:45,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:30:45,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:30:45,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:30:45,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:45,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:45,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:45,962 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 24 [2021-06-05 16:30:45,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:45,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:45,971 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:45,972 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 [2021-06-05 16:30:45,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:45,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:45,984 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:30:45,984 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 30 treesize of output 20 [2021-06-05 16:30:45,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:45,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:45,995 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:45,995 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 [2021-06-05 16:30:45,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:45,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:46,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:46,007 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 [2021-06-05 16:30:46,008 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:46,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:46,017 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:46,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:30:46,018 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:46,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:46,026 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:46,026 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 33 treesize of output 19 [2021-06-05 16:30:46,027 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:46,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:46,036 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:46,036 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 1 [2021-06-05 16:30:46,037 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:46,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:46,049 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:46,049 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 30 treesize of output 16 [2021-06-05 16:30:46,050 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:46,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:46,062 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:30:46,062 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 [2021-06-05 16:30:46,063 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:46,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:46,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:46,074 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 [2021-06-05 16:30:46,077 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:46,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:46,085 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:46,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:30:46,085 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:46,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:46,109 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:46,110 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 33 treesize of output 19 [2021-06-05 16:30:46,110 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:46,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:46,121 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:46,121 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 [2021-06-05 16:30:46,122 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:46,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:46,135 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:30:46,135 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 [2021-06-05 16:30:46,137 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:46,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:46,144 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:46,144 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 28 treesize of output 16 [2021-06-05 16:30:46,145 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:46,238 INFO L628 ElimStorePlain]: treesize reduction 60, result has 57.4 percent of original size [2021-06-05 16:30:46,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:30:46,241 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:71 [2021-06-05 16:30:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:46,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826222906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:46,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:46,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:30:46,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657491570] [2021-06-05 16:30:46,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:30:46,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:46,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:30:46,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:30:46,350 INFO L87 Difference]: Start difference. First operand 1516 states and 5114 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) [2021-06-05 16:30:46,825 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-05 16:30:47,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:47,452 INFO L93 Difference]: Finished difference Result 2050 states and 6744 transitions. [2021-06-05 16:30:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:30:47,453 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 [2021-06-05 16:30:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:47,456 INFO L225 Difference]: With dead ends: 2050 [2021-06-05 16:30:47,456 INFO L226 Difference]: Without dead ends: 2035 [2021-06-05 16:30:47,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1163.9ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:30:47,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-06-05 16:30:47,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1516. [2021-06-05 16:30:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.3755775577557756) internal successors, (5114), 1515 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 5114 transitions. [2021-06-05 16:30:47,477 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 5114 transitions. Word has length 26 [2021-06-05 16:30:47,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:47,478 INFO L482 AbstractCegarLoop]: Abstraction has 1516 states and 5114 transitions. [2021-06-05 16:30:47,478 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) [2021-06-05 16:30:47,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 5114 transitions. [2021-06-05 16:30:47,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:47,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:47,491 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:30:47,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1121 [2021-06-05 16:30:47,703 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:47,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:47,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1368330285, now seen corresponding path program 16 times [2021-06-05 16:30:47,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:47,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650898229] [2021-06-05 16:30:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:48,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:48,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650898229] [2021-06-05 16:30:48,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650898229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:48,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736641140] [2021-06-05 16:30:48,093 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 [2021-06-05 16:30:48,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:30:48,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:30:48,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:30:48,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:48,389 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-06-05 16:30:48,578 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 46 [2021-06-05 16:30:48,637 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_38], 2=[A, v_prenex_37]} [2021-06-05 16:30:48,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:48,641 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 [2021-06-05 16:30:48,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:48,747 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-05 16:30:48,747 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-06-05 16:30:48,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:48,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:48,751 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:30:48,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:48,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:48,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:48,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:48,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:48,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:48,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:48,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:30:48,799 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:22 [2021-06-05 16:30:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:48,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736641140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:48,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:48,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:30:48,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740876007] [2021-06-05 16:30:48,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:30:48,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:48,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:30:48,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:30:48,834 INFO L87 Difference]: Start difference. First operand 1516 states and 5114 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) [2021-06-05 16:30:49,780 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 16:30:50,101 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2021-06-05 16:30:50,262 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-06-05 16:30:50,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:50,499 INFO L93 Difference]: Finished difference Result 2399 states and 7708 transitions. [2021-06-05 16:30:50,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:30:50,500 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 [2021-06-05 16:30:50,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:50,503 INFO L225 Difference]: With dead ends: 2399 [2021-06-05 16:30:50,503 INFO L226 Difference]: Without dead ends: 2354 [2021-06-05 16:30:50,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1946.5ms TimeCoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:30:50,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2021-06-05 16:30:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 1531. [2021-06-05 16:30:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 3.3816993464052287) internal successors, (5174), 1530 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:50,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 5174 transitions. [2021-06-05 16:30:50,528 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 5174 transitions. Word has length 26 [2021-06-05 16:30:50,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:50,528 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 5174 transitions. [2021-06-05 16:30:50,528 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) [2021-06-05 16:30:50,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 5174 transitions. [2021-06-05 16:30:50,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:50,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:50,530 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:30:50,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1168,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:30:50,731 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:50,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:50,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1309104231, now seen corresponding path program 17 times [2021-06-05 16:30:50,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:50,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877164651] [2021-06-05 16:30:50,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:50,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:50,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877164651] [2021-06-05 16:30:50,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877164651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:50,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860342157] [2021-06-05 16:30:50,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:30:51,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:30:51,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:30:51,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:30:51,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:51,338 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 16:30:51,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:51,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:51,432 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 [2021-06-05 16:30:51,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:51,763 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2021-06-05 16:30:51,763 INFO L628 ElimStorePlain]: treesize reduction 116, result has 75.0 percent of original size [2021-06-05 16:30:51,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:51,779 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:30:51,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-06-05 16:30:51,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:51,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:51,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:51,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-06-05 16:30:51,796 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:52,035 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-06-05 16:30:52,036 INFO L628 ElimStorePlain]: treesize reduction 20, result has 93.6 percent of original size [2021-06-05 16:30:52,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:52,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:52,047 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 [2021-06-05 16:30:52,051 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:52,163 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 16:30:52,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:52,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:52,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:52,178 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 30 treesize of output 24 [2021-06-05 16:30:52,181 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:52,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:52,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:52,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-06-05 16:30:52,197 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:52,375 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2021-06-05 16:30:52,375 INFO L628 ElimStorePlain]: treesize reduction 16, result has 93.2 percent of original size [2021-06-05 16:30:52,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:52,387 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:30:52,387 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 [2021-06-05 16:30:52,388 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:52,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:52,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:52,482 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:30:52,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:30:52,484 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:52,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:52,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:52,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:52,573 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 [2021-06-05 16:30:52,575 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:52,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:52,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:52,661 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:30:52,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:30:52,662 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:52,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:52,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:30:52,752 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:479, output treesize:150 [2021-06-05 16:30:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:52,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860342157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:52,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:52,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:30:52,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444915224] [2021-06-05 16:30:52,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:30:52,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:52,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:30:52,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:30:52,874 INFO L87 Difference]: Start difference. First operand 1531 states and 5174 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) [2021-06-05 16:30:54,127 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-05 16:30:54,308 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-06-05 16:30:54,620 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 16:30:55,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:55,137 INFO L93 Difference]: Finished difference Result 2633 states and 8507 transitions. [2021-06-05 16:30:55,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:30:55,137 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 [2021-06-05 16:30:55,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:55,140 INFO L225 Difference]: With dead ends: 2633 [2021-06-05 16:30:55,141 INFO L226 Difference]: Without dead ends: 2603 [2021-06-05 16:30:55,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 2248.0ms TimeCoverageRelationStatistics Valid=325, Invalid=1481, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:30:55,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-06-05 16:30:55,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1532. [2021-06-05 16:30:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.3860222077073807) internal successors, (5184), 1531 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:55,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5184 transitions. [2021-06-05 16:30:55,172 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5184 transitions. Word has length 26 [2021-06-05 16:30:55,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:55,172 INFO L482 AbstractCegarLoop]: Abstraction has 1532 states and 5184 transitions. [2021-06-05 16:30:55,172 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) [2021-06-05 16:30:55,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5184 transitions. [2021-06-05 16:30:55,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:55,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:55,176 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:30:55,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1180 [2021-06-05 16:30:55,389 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:55,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:55,389 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 18 times [2021-06-05 16:30:55,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:55,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222957244] [2021-06-05 16:30:55,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:55,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:55,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222957244] [2021-06-05 16:30:55,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222957244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:55,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764348480] [2021-06-05 16:30:55,711 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 [2021-06-05 16:30:55,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:30:55,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:30:55,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:30:55,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:56,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:56,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:30:56,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:56,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:56,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,163 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:30:56,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:56,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:56,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:30:56,171 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:56,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:56,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:30:56,177 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:56,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:56,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:30:56,183 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:56,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:56,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,201 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:30:56,213 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:56,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:56,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:56,221 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:56,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:56,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:56,229 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:56,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:56,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,236 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 [2021-06-05 16:30:56,236 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:56,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:56,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:56,243 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:56,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:56,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,249 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 [2021-06-05 16:30:56,250 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:56,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:56,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:56,256 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:56,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:56,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:30:56,261 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:56,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:56,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:56,267 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:56,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:56,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:56,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:30:56,270 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:56,289 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:30:56,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:30:56,290 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:30:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:56,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764348480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:56,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:56,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:30:56,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918620791] [2021-06-05 16:30:56,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:30:56,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:56,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:30:56,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:30:56,316 INFO L87 Difference]: Start difference. First operand 1532 states and 5184 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) [2021-06-05 16:30:57,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:57,288 INFO L93 Difference]: Finished difference Result 2023 states and 6645 transitions. [2021-06-05 16:30:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:30:57,289 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 [2021-06-05 16:30:57,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:57,291 INFO L225 Difference]: With dead ends: 2023 [2021-06-05 16:30:57,291 INFO L226 Difference]: Without dead ends: 1998 [2021-06-05 16:30:57,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1126.0ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:30:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-06-05 16:30:57,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1567. [2021-06-05 16:30:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1566 states have (on average 3.3812260536398466) internal successors, (5295), 1566 states have internal predecessors, (5295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 5295 transitions. [2021-06-05 16:30:57,310 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 5295 transitions. Word has length 26 [2021-06-05 16:30:57,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:57,310 INFO L482 AbstractCegarLoop]: Abstraction has 1567 states and 5295 transitions. [2021-06-05 16:30:57,310 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) [2021-06-05 16:30:57,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 5295 transitions. [2021-06-05 16:30:57,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:57,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:57,312 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:30:57,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1208,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:30:57,513 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:57,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:57,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1409101781, now seen corresponding path program 19 times [2021-06-05 16:30:57,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:57,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288735152] [2021-06-05 16:30:57,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:57,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:57,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288735152] [2021-06-05 16:30:57,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288735152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:57,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608856245] [2021-06-05 16:30:57,815 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 [2021-06-05 16:30:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:57,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:30:57,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:58,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:58,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:58,241 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 24 [2021-06-05 16:30:58,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:58,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:58,258 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:58,259 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 [2021-06-05 16:30:58,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:58,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:58,275 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:30:58,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-06-05 16:30:58,277 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:58,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:58,290 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:30:58,290 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 [2021-06-05 16:30:58,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:58,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:58,303 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:58,303 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 [2021-06-05 16:30:58,304 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:58,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:58,314 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:58,314 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 [2021-06-05 16:30:58,315 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:58,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:58,326 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:58,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:30:58,327 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:58,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:58,342 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:30:58,342 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 20 [2021-06-05 16:30:58,343 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:58,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:58,355 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:58,355 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 [2021-06-05 16:30:58,355 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:58,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:58,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:58,369 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 24 [2021-06-05 16:30:58,373 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:58,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:58,384 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:58,384 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 [2021-06-05 16:30:58,385 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:58,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:58,396 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:58,396 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 [2021-06-05 16:30:58,397 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:58,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:58,410 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:30:58,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:30:58,412 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:58,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:58,424 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:58,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-06-05 16:30:58,425 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:58,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:58,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:58,436 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 [2021-06-05 16:30:58,442 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:58,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:58,449 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:30:58,449 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 [2021-06-05 16:30:58,450 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:58,549 INFO L628 ElimStorePlain]: treesize reduction 26, result has 82.8 percent of original size [2021-06-05 16:30:58,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:30:58,551 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:649, output treesize:91 [2021-06-05 16:30:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:30:58,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608856245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:58,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:58,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:30:58,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475688846] [2021-06-05 16:30:58,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:30:58,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:58,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:30:58,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:30:58,634 INFO L87 Difference]: Start difference. First operand 1567 states and 5295 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) [2021-06-05 16:30:59,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:59,541 INFO L93 Difference]: Finished difference Result 2240 states and 7336 transitions. [2021-06-05 16:30:59,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:30:59,541 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 [2021-06-05 16:30:59,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:59,544 INFO L225 Difference]: With dead ends: 2240 [2021-06-05 16:30:59,544 INFO L226 Difference]: Without dead ends: 2215 [2021-06-05 16:30:59,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1128.0ms TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:30:59,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-06-05 16:30:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 1570. [2021-06-05 16:30:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.3817718291905674) internal successors, (5306), 1569 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5306 transitions. [2021-06-05 16:30:59,587 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5306 transitions. Word has length 26 [2021-06-05 16:30:59,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:59,587 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 5306 transitions. [2021-06-05 16:30:59,588 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) [2021-06-05 16:30:59,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5306 transitions. [2021-06-05 16:30:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:59,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:59,590 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:30:59,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1250,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:30:59,791 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:59,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:59,795 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 20 times [2021-06-05 16:30:59,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:59,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211185569] [2021-06-05 16:30:59,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:00,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:00,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211185569] [2021-06-05 16:31:00,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211185569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:00,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675585185] [2021-06-05 16:31:00,097 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) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:00,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:31:00,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:00,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:31:00,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:00,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:00,542 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:31:00,543 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 [2021-06-05 16:31:00,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:00,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:00,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:00,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:31:00,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:00,689 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 16:31:00,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:00,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:00,713 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:31:00,713 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:31:00,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:00,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:00,734 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:31:00,734 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 16:31:00,737 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:00,862 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 16:31:00,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:00,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:00,885 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:31:00,885 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 30 treesize of output 28 [2021-06-05 16:31:00,887 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:00,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:00,906 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:31:00,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 28 [2021-06-05 16:31:00,909 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:01,034 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-05 16:31:01,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:01,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:01,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:01,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:31:01,055 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:01,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:01,070 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:31:01,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 24 [2021-06-05 16:31:01,071 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:01,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:01,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:31:01,188 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:329, output treesize:220 [2021-06-05 16:31:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:01,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675585185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:01,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:01,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:31:01,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537216] [2021-06-05 16:31:01,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:31:01,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:01,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:31:01,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:31:01,367 INFO L87 Difference]: Start difference. First operand 1570 states and 5306 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) [2021-06-05 16:31:02,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:02,370 INFO L93 Difference]: Finished difference Result 1853 states and 6135 transitions. [2021-06-05 16:31:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:31:02,371 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 [2021-06-05 16:31:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:02,373 INFO L225 Difference]: With dead ends: 1853 [2021-06-05 16:31:02,373 INFO L226 Difference]: Without dead ends: 1828 [2021-06-05 16:31:02,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1166.9ms TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:31:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-06-05 16:31:02,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1583. [2021-06-05 16:31:02,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.3874841972187104) internal successors, (5359), 1582 states have internal predecessors, (5359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5359 transitions. [2021-06-05 16:31:02,394 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5359 transitions. Word has length 26 [2021-06-05 16:31:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:02,394 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 5359 transitions. [2021-06-05 16:31:02,394 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) [2021-06-05 16:31:02,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5359 transitions. [2021-06-05 16:31:02,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:02,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:02,397 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:02,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1301,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:02,601 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:02,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:02,601 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 21 times [2021-06-05 16:31:02,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:02,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062595871] [2021-06-05 16:31:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:02,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:02,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062595871] [2021-06-05 16:31:02,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062595871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:02,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950290699] [2021-06-05 16:31:02,939 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 [2021-06-05 16:31:02,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:31:02,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:02,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:31:02,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:03,308 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 16:31:03,555 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_67, v_prenex_66], 3=[v_prenex_68]} [2021-06-05 16:31:03,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:03,560 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 [2021-06-05 16:31:03,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:03,698 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-06-05 16:31:03,698 INFO L628 ElimStorePlain]: treesize reduction 123, result has 44.1 percent of original size [2021-06-05 16:31:03,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:03,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:03,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:31:03,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:03,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:03,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:03,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:03,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:31:03,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:03,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:03,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:03,763 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 [2021-06-05 16:31:03,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:03,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:03,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:31:03,788 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:234, output treesize:20 [2021-06-05 16:31:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:03,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950290699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:03,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:03,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:31:03,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525747118] [2021-06-05 16:31:03,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:31:03,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:03,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:31:03,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:31:03,817 INFO L87 Difference]: Start difference. First operand 1583 states and 5359 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) [2021-06-05 16:31:04,581 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 16:31:04,809 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 80 [2021-06-05 16:31:05,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:05,032 INFO L93 Difference]: Finished difference Result 2166 states and 7091 transitions. [2021-06-05 16:31:05,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:31:05,032 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 [2021-06-05 16:31:05,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:05,035 INFO L225 Difference]: With dead ends: 2166 [2021-06-05 16:31:05,035 INFO L226 Difference]: Without dead ends: 2121 [2021-06-05 16:31:05,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1440.5ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:31:05,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2021-06-05 16:31:05,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1613. [2021-06-05 16:31:05,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 3.3957816377171217) internal successors, (5474), 1612 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:05,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 5474 transitions. [2021-06-05 16:31:05,056 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 5474 transitions. Word has length 26 [2021-06-05 16:31:05,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:05,056 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 5474 transitions. [2021-06-05 16:31:05,057 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) [2021-06-05 16:31:05,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 5474 transitions. [2021-06-05 16:31:05,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:05,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:05,059 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:05,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:05,260 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:05,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:05,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1194379997, now seen corresponding path program 22 times [2021-06-05 16:31:05,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:05,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135178138] [2021-06-05 16:31:05,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:05,612 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-05 16:31:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:05,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:05,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135178138] [2021-06-05 16:31:05,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135178138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:05,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964401428] [2021-06-05 16:31:05,671 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 [2021-06-05 16:31:05,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:31:05,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:05,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:31:05,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:06,022 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 16:31:06,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:06,168 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:31:06,168 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 [2021-06-05 16:31:06,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:06,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:06,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:06,182 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 [2021-06-05 16:31:06,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:06,488 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 124 [2021-06-05 16:31:06,489 INFO L628 ElimStorePlain]: treesize reduction 69, result has 84.4 percent of original size [2021-06-05 16:31:06,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:06,502 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:31:06,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:31:06,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:06,661 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 16:31:06,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:06,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:06,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:06,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-06-05 16:31:06,681 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:06,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:06,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:06,694 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 24 [2021-06-05 16:31:06,696 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:06,934 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2021-06-05 16:31:06,934 INFO L628 ElimStorePlain]: treesize reduction 18, result has 94.4 percent of original size [2021-06-05 16:31:06,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:06,948 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:31:06,949 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 28 treesize of output 20 [2021-06-05 16:31:06,950 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:07,059 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 16:31:07,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:07,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:07,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:07,072 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 [2021-06-05 16:31:07,076 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:07,182 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 16:31:07,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:07,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:07,194 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:31:07,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:31:07,196 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:07,297 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 16:31:07,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:07,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:07,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:07,308 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 [2021-06-05 16:31:07,312 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:07,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:07,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:07,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:07,419 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 24 [2021-06-05 16:31:07,420 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:07,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:07,428 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:31:07,428 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 1 [2021-06-05 16:31:07,429 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:07,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:07,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:31:07,508 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:503, output treesize:150 [2021-06-05 16:31:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:07,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964401428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:07,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:07,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:31:07,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687936087] [2021-06-05 16:31:07,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:31:07,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:07,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:31:07,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:31:07,645 INFO L87 Difference]: Start difference. First operand 1613 states and 5474 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) [2021-06-05 16:31:08,527 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 16:31:08,686 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 16:31:08,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:08,875 INFO L93 Difference]: Finished difference Result 2386 states and 7813 transitions. [2021-06-05 16:31:08,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:31:08,876 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 [2021-06-05 16:31:08,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:08,879 INFO L225 Difference]: With dead ends: 2386 [2021-06-05 16:31:08,879 INFO L226 Difference]: Without dead ends: 2352 [2021-06-05 16:31:08,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1599.8ms TimeCoverageRelationStatistics Valid=239, Invalid=883, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:31:08,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-06-05 16:31:08,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 1599. [2021-06-05 16:31:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.392991239048811) internal successors, (5422), 1598 states have internal predecessors, (5422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:08,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5422 transitions. [2021-06-05 16:31:08,900 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5422 transitions. Word has length 26 [2021-06-05 16:31:08,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:08,900 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5422 transitions. [2021-06-05 16:31:08,900 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) [2021-06-05 16:31:08,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5422 transitions. [2021-06-05 16:31:08,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:08,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:08,902 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:09,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1375 [2021-06-05 16:31:09,103 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:09,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:09,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 23 times [2021-06-05 16:31:09,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:09,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499066838] [2021-06-05 16:31:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:09,305 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-06-05 16:31:09,423 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2021-06-05 16:31:09,548 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-06-05 16:31:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:09,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:09,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499066838] [2021-06-05 16:31:09,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499066838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:09,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520384476] [2021-06-05 16:31:09,610 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 [2021-06-05 16:31:09,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:31:09,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:09,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:31:09,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:10,126 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-05 16:31:10,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:10,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:10,291 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 [2021-06-05 16:31:10,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:10,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:10,307 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:31:10,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:31:10,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:10,617 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-06-05 16:31:10,617 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.2 percent of original size [2021-06-05 16:31:10,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:10,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:10,634 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 24 [2021-06-05 16:31:10,637 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:10,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:10,648 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:31:10,648 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 20 [2021-06-05 16:31:10,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:10,793 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 16:31:10,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:10,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:10,806 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:31:10,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:31:10,808 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:10,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:10,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:10,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:31:10,821 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:10,952 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 16:31:10,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:10,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:10,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:10,965 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 30 treesize of output 24 [2021-06-05 16:31:10,969 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:10,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:10,979 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:31:10,979 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 20 [2021-06-05 16:31:10,980 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:11,095 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 16:31:11,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:11,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:11,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:11,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:31:11,116 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:11,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:11,126 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:31:11,126 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 [2021-06-05 16:31:11,127 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:11,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:11,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:31:11,230 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:391, output treesize:170 [2021-06-05 16:31:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:11,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520384476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:11,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:11,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:31:11,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144204501] [2021-06-05 16:31:11,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:31:11,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:11,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:31:11,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:31:11,406 INFO L87 Difference]: Start difference. First operand 1599 states and 5422 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) [2021-06-05 16:31:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:12,383 INFO L93 Difference]: Finished difference Result 2115 states and 7008 transitions. [2021-06-05 16:31:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:31:12,383 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 [2021-06-05 16:31:12,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:12,386 INFO L225 Difference]: With dead ends: 2115 [2021-06-05 16:31:12,386 INFO L226 Difference]: Without dead ends: 2090 [2021-06-05 16:31:12,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1585.9ms TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:31:12,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-06-05 16:31:12,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1599. [2021-06-05 16:31:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.392991239048811) internal successors, (5422), 1598 states have internal predecessors, (5422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5422 transitions. [2021-06-05 16:31:12,405 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5422 transitions. Word has length 26 [2021-06-05 16:31:12,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:12,405 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5422 transitions. [2021-06-05 16:31:12,406 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) [2021-06-05 16:31:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5422 transitions. [2021-06-05 16:31:12,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:12,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:12,408 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:12,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1404,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:12,608 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:12,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:12,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1510554133, now seen corresponding path program 42 times [2021-06-05 16:31:12,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:12,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190464731] [2021-06-05 16:31:12,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:12,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:12,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190464731] [2021-06-05 16:31:12,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190464731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:12,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080768034] [2021-06-05 16:31:12,849 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 [2021-06-05 16:31:12,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:31:12,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:12,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:31:12,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:13,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:13,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,418 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 35 treesize of output 19 [2021-06-05 16:31:13,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:13,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:13,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:31:13,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:13,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:13,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:31:13,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:13,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:13,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,442 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 [2021-06-05 16:31:13,443 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:13,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:13,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,450 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 16 [2021-06-05 16:31:13,450 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:13,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:13,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,457 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 41 treesize of output 13 [2021-06-05 16:31:13,458 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:13,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:13,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,466 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 [2021-06-05 16:31:13,467 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:13,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:13,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,474 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 [2021-06-05 16:31:13,474 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:13,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:13,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,481 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 [2021-06-05 16:31:13,482 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:13,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:13,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:31:13,492 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:13,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:13,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,499 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 [2021-06-05 16:31:13,500 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:13,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:13,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:31:13,508 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:13,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:13,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,514 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 [2021-06-05 16:31:13,515 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:13,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:13,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:31:13,522 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:13,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:13,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:13,527 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 [2021-06-05 16:31:13,528 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:13,548 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-06-05 16:31:13,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:31:13,549 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:31:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:13,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080768034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:13,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:13,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:31:13,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655549900] [2021-06-05 16:31:13,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:31:13,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:13,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:31:13,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:31:13,572 INFO L87 Difference]: Start difference. First operand 1599 states and 5422 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) [2021-06-05 16:31:14,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:14,924 INFO L93 Difference]: Finished difference Result 2060 states and 6796 transitions. [2021-06-05 16:31:14,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:31:14,924 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 [2021-06-05 16:31:14,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:14,927 INFO L225 Difference]: With dead ends: 2060 [2021-06-05 16:31:14,927 INFO L226 Difference]: Without dead ends: 2034 [2021-06-05 16:31:14,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1420.4ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:31:14,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-06-05 16:31:14,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1603. [2021-06-05 16:31:14,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.3907615480649187) internal successors, (5432), 1602 states have internal predecessors, (5432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5432 transitions. [2021-06-05 16:31:14,948 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5432 transitions. Word has length 26 [2021-06-05 16:31:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:14,948 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 5432 transitions. [2021-06-05 16:31:14,948 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) [2021-06-05 16:31:14,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5432 transitions. [2021-06-05 16:31:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:14,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:14,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:15,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1441 [2021-06-05 16:31:15,151 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:15,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:15,151 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-06-05 16:31:15,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:15,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530876928] [2021-06-05 16:31:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:15,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:15,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530876928] [2021-06-05 16:31:15,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530876928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:15,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342188105] [2021-06-05 16:31:15,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:15,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:31:15,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:15,832 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_92, v_prenex_96], 5=[v_prenex_94, A]} [2021-06-05 16:31:15,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:15,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:15,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:15,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:31:15,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:15,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:15,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:15,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-06-05 16:31:15,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:15,942 INFO L628 ElimStorePlain]: treesize reduction 133, result has 45.9 percent of original size [2021-06-05 16:31:15,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:15,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:15,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:15,947 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 23 treesize of output 13 [2021-06-05 16:31:15,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:15,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:15,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:15,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:15,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 16:31:15,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:16,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:16,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:16,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:16,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:31:16,010 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:16,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:16,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:31:16,046 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:303, output treesize:29 [2021-06-05 16:31:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:16,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342188105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:16,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:16,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:31:16,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066399452] [2021-06-05 16:31:16,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:31:16,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:16,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:31:16,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:31:16,095 INFO L87 Difference]: Start difference. First operand 1603 states and 5432 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) [2021-06-05 16:31:17,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:17,489 INFO L93 Difference]: Finished difference Result 2261 states and 7446 transitions. [2021-06-05 16:31:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:31:17,490 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 [2021-06-05 16:31:17,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:17,493 INFO L225 Difference]: With dead ends: 2261 [2021-06-05 16:31:17,493 INFO L226 Difference]: Without dead ends: 2246 [2021-06-05 16:31:17,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1486.7ms TimeCoverageRelationStatistics Valid=355, Invalid=1451, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:31:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-06-05 16:31:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1603. [2021-06-05 16:31:17,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.3907615480649187) internal successors, (5432), 1602 states have internal predecessors, (5432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5432 transitions. [2021-06-05 16:31:17,513 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5432 transitions. Word has length 26 [2021-06-05 16:31:17,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:17,513 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 5432 transitions. [2021-06-05 16:31:17,513 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) [2021-06-05 16:31:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5432 transitions. [2021-06-05 16:31:17,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:17,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:17,515 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:17,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1531 [2021-06-05 16:31:17,716 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:17,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:17,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 24 times [2021-06-05 16:31:17,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:17,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127015803] [2021-06-05 16:31:17,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:18,025 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-06-05 16:31:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:18,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:18,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127015803] [2021-06-05 16:31:18,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127015803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:18,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383020094] [2021-06-05 16:31:18,159 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 [2021-06-05 16:31:18,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:31:18,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:18,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:31:18,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:18,617 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 16:31:19,150 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:31:19,150 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 16:31:19,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:19,521 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 124 [2021-06-05 16:31:19,522 INFO L628 ElimStorePlain]: treesize reduction 126, result has 75.9 percent of original size [2021-06-05 16:31:19,544 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:31:19,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:31:19,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:19,699 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 16:31:19,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:19,718 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:31:19,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:31:19,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:19,869 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 16:31:19,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:19,889 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:31:19,889 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 28 treesize of output 24 [2021-06-05 16:31:19,890 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:20,045 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:31:20,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:20,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:20,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:31:20,065 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:20,206 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 16:31:20,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:20,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:20,226 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 30 treesize of output 32 [2021-06-05 16:31:20,228 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:20,238 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:31:20,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 16 [2021-06-05 16:31:20,239 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:20,483 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2021-06-05 16:31:20,484 INFO L628 ElimStorePlain]: treesize reduction 21, result has 93.4 percent of original size [2021-06-05 16:31:20,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:20,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 32 [2021-06-05 16:31:20,506 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:20,516 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:31:20,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:31:20,516 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:20,620 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 16:31:20,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:20,640 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:31:20,640 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:31:20,641 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:20,743 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 16:31:20,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:20,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:31:20,757 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:539, output treesize:402 [2021-06-05 16:31:20,967 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-06-05 16:31:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:21,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383020094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:21,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:21,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:31:21,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692568460] [2021-06-05 16:31:21,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:31:21,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:21,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:31:21,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:31:21,064 INFO L87 Difference]: Start difference. First operand 1603 states and 5432 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) [2021-06-05 16:31:21,805 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2021-06-05 16:31:21,940 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2021-06-05 16:31:22,389 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-06-05 16:31:22,548 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2021-06-05 16:31:22,777 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-06-05 16:31:23,031 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-06-05 16:31:23,205 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-06-05 16:31:23,529 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 84 [2021-06-05 16:31:23,866 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2021-06-05 16:31:24,245 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-06-05 16:31:24,654 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 88 [2021-06-05 16:31:25,207 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 89 [2021-06-05 16:31:25,436 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-06-05 16:31:26,033 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2021-06-05 16:31:26,401 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 28 [2021-06-05 16:31:26,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:26,613 INFO L93 Difference]: Finished difference Result 2594 states and 8222 transitions. [2021-06-05 16:31:26,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:31:26,613 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 [2021-06-05 16:31:26,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:26,616 INFO L225 Difference]: With dead ends: 2594 [2021-06-05 16:31:26,616 INFO L226 Difference]: Without dead ends: 2530 [2021-06-05 16:31:26,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 5896.1ms TimeCoverageRelationStatistics Valid=469, Invalid=2183, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:31:26,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-05 16:31:26,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 1635. [2021-06-05 16:31:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 3.401468788249694) internal successors, (5558), 1634 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:26,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 5558 transitions. [2021-06-05 16:31:26,642 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 5558 transitions. Word has length 26 [2021-06-05 16:31:26,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:26,642 INFO L482 AbstractCegarLoop]: Abstraction has 1635 states and 5558 transitions. [2021-06-05 16:31:26,642 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) [2021-06-05 16:31:26,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 5558 transitions. [2021-06-05 16:31:26,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:26,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:26,644 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:26,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1545,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:26,865 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:26,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:26,865 INFO L82 PathProgramCache]: Analyzing trace with hash 519326571, now seen corresponding path program 44 times [2021-06-05 16:31:26,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:26,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138788756] [2021-06-05 16:31:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:27,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:27,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138788756] [2021-06-05 16:31:27,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138788756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:27,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397006865] [2021-06-05 16:31:27,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:27,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:31:27,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:27,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:31:27,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:27,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:27,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:27,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:27,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 45 [2021-06-05 16:31:27,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:27,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:27,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:27,925 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 16:31:27,925 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 [2021-06-05 16:31:27,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:27,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:27,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:27,953 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:31:27,953 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 [2021-06-05 16:31:27,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:27,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:27,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:27,977 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:31:27,977 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 [2021-06-05 16:31:27,978 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:27,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:27,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:28,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:31:28,021 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:28,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,045 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-06-05 16:31:28,045 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 26 [2021-06-05 16:31:28,046 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:28,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,069 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 16:31:28,069 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 [2021-06-05 16:31:28,071 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:28,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,097 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:31:28,097 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 [2021-06-05 16:31:28,108 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:28,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,126 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:31:28,126 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 [2021-06-05 16:31:28,127 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:28,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,141 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:31:28,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:31:28,142 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:28,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,159 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:31:28,159 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 [2021-06-05 16:31:28,159 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:28,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,175 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:31:28,175 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 [2021-06-05 16:31:28,176 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:28,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,190 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:31:28,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:31:28,191 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:28,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,206 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:31:28,207 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 [2021-06-05 16:31:28,207 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:28,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,221 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:31:28,221 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 [2021-06-05 16:31:28,222 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:28,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:28,230 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:31:28,231 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 [2021-06-05 16:31:28,231 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:28,308 INFO L628 ElimStorePlain]: treesize reduction 56, result has 61.4 percent of original size [2021-06-05 16:31:28,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:31:28,310 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:745, output treesize:71 [2021-06-05 16:31:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:28,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397006865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:28,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:28,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 16:31:28,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311668459] [2021-06-05 16:31:28,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:31:28,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:28,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:31:28,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:31:28,390 INFO L87 Difference]: Start difference. First operand 1635 states and 5558 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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) [2021-06-05 16:31:30,854 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 16:31:31,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:31,570 INFO L93 Difference]: Finished difference Result 2662 states and 8486 transitions. [2021-06-05 16:31:31,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:31:31,571 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 [2021-06-05 16:31:31,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:31,574 INFO L225 Difference]: With dead ends: 2662 [2021-06-05 16:31:31,574 INFO L226 Difference]: Without dead ends: 2618 [2021-06-05 16:31:31,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 3064.1ms TimeCoverageRelationStatistics Valid=692, Invalid=3598, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:31:31,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2021-06-05 16:31:31,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 1642. [2021-06-05 16:31:31,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 3.4021937842778796) internal successors, (5583), 1641 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:31,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 5583 transitions. [2021-06-05 16:31:31,596 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 5583 transitions. Word has length 26 [2021-06-05 16:31:31,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:31,596 INFO L482 AbstractCegarLoop]: Abstraction has 1642 states and 5583 transitions. [2021-06-05 16:31:31,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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) [2021-06-05 16:31:31,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 5583 transitions. [2021-06-05 16:31:31,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:31,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:31,598 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:31,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1623 [2021-06-05 16:31:31,799 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:31,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:31,799 INFO L82 PathProgramCache]: Analyzing trace with hash -456992273, now seen corresponding path program 45 times [2021-06-05 16:31:31,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:31,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682536389] [2021-06-05 16:31:31,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:32,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:32,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682536389] [2021-06-05 16:31:32,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682536389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:32,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291769894] [2021-06-05 16:31:32,136 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:32,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:31:32,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:32,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:31:32,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:32,767 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:31:32,768 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 [2021-06-05 16:31:32,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:32,813 INFO L354 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-06-05 16:31:32,814 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 34 [2021-06-05 16:31:32,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:32,845 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:31:32,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 30 [2021-06-05 16:31:32,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:32,878 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:31:32,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 30 [2021-06-05 16:31:32,879 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:32,910 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:31:32,910 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 31 treesize of output 30 [2021-06-05 16:31:32,912 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:32,929 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:31:32,929 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 33 treesize of output 1 [2021-06-05 16:31:32,930 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:32,971 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:31:32,972 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 26 treesize of output 40 [2021-06-05 16:31:32,976 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:33,015 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:31:33,015 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 40 [2021-06-05 16:31:33,021 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:33,038 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:31:33,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-06-05 16:31:33,039 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:33,082 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:31:33,082 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 21 treesize of output 45 [2021-06-05 16:31:33,093 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:33,112 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:31:33,112 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 33 treesize of output 1 [2021-06-05 16:31:33,113 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:33,129 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:31:33,129 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 28 treesize of output 1 [2021-06-05 16:31:33,130 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:33,167 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:31:33,167 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 26 treesize of output 40 [2021-06-05 16:31:33,172 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:33,205 INFO L354 Elim1Store]: treesize reduction 26, result has 36.6 percent of original size [2021-06-05 16:31:33,206 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 16:31:33,207 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:33,223 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:31:33,223 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:31:33,224 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:33,253 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:31:33,253 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 28 treesize of output 40 [2021-06-05 16:31:33,261 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:33,537 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-05 16:31:33,538 INFO L628 ElimStorePlain]: treesize reduction 92, result has 77.5 percent of original size [2021-06-05 16:31:33,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 16:31:33,544 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:833, output treesize:358 [2021-06-05 16:31:33,777 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-05 16:31:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:33,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291769894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:33,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:33,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 16:31:33,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560293219] [2021-06-05 16:31:33,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:31:33,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:33,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:31:33,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:31:33,888 INFO L87 Difference]: Start difference. First operand 1642 states and 5583 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) [2021-06-05 16:31:36,408 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-05 16:31:36,549 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-05 16:31:36,838 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-06-05 16:31:37,008 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-06-05 16:31:37,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:37,205 INFO L93 Difference]: Finished difference Result 3238 states and 10236 transitions. [2021-06-05 16:31:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:31:37,206 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 [2021-06-05 16:31:37,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:37,210 INFO L225 Difference]: With dead ends: 3238 [2021-06-05 16:31:37,210 INFO L226 Difference]: Without dead ends: 3208 [2021-06-05 16:31:37,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 3323.2ms TimeCoverageRelationStatistics Valid=689, Invalid=3733, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:31:37,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3208 states. [2021-06-05 16:31:37,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 1691. [2021-06-05 16:31:37,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 3.4005917159763315) internal successors, (5747), 1690 states have internal predecessors, (5747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 5747 transitions. [2021-06-05 16:31:37,239 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 5747 transitions. Word has length 26 [2021-06-05 16:31:37,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:37,239 INFO L482 AbstractCegarLoop]: Abstraction has 1691 states and 5747 transitions. [2021-06-05 16:31:37,239 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) [2021-06-05 16:31:37,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 5747 transitions. [2021-06-05 16:31:37,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:37,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:37,241 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:37,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1727,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:37,442 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:37,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:37,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1125767463, now seen corresponding path program 25 times [2021-06-05 16:31:37,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:37,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647809469] [2021-06-05 16:31:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:37,757 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-06-05 16:31:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:37,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:37,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647809469] [2021-06-05 16:31:37,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647809469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:37,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266061159] [2021-06-05 16:31:37,882 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:37,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:31:37,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:38,181 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-06-05 16:31:38,399 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_134, v_prenex_135]} [2021-06-05 16:31:38,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:38,402 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 [2021-06-05 16:31:38,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:38,508 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-05 16:31:38,508 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-06-05 16:31:38,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:38,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:38,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:31:38,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:38,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:38,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:38,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:38,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:31:38,540 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:38,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:38,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:31:38,562 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:22 [2021-06-05 16:31:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:38,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266061159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:38,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:38,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:31:38,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089713597] [2021-06-05 16:31:38,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:31:38,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:38,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:31:38,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:31:38,597 INFO L87 Difference]: Start difference. First operand 1691 states and 5747 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) [2021-06-05 16:31:39,496 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 16:31:39,625 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-06-05 16:31:39,816 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-05 16:31:40,004 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2021-06-05 16:31:40,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:40,254 INFO L93 Difference]: Finished difference Result 2561 states and 8224 transitions. [2021-06-05 16:31:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:31:40,255 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 [2021-06-05 16:31:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:40,258 INFO L225 Difference]: With dead ends: 2561 [2021-06-05 16:31:40,258 INFO L226 Difference]: Without dead ends: 2516 [2021-06-05 16:31:40,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1942.4ms TimeCoverageRelationStatistics Valid=273, Invalid=987, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:31:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2021-06-05 16:31:40,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 1720. [2021-06-05 16:31:40,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 3.414194299011053) internal successors, (5869), 1719 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:40,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 5869 transitions. [2021-06-05 16:31:40,280 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 5869 transitions. Word has length 26 [2021-06-05 16:31:40,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:40,281 INFO L482 AbstractCegarLoop]: Abstraction has 1720 states and 5869 transitions. [2021-06-05 16:31:40,281 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) [2021-06-05 16:31:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 5869 transitions. [2021-06-05 16:31:40,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:40,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:40,283 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:40,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1859 [2021-06-05 16:31:40,483 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:40,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:40,483 INFO L82 PathProgramCache]: Analyzing trace with hash -491765317, now seen corresponding path program 26 times [2021-06-05 16:31:40,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:40,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485169523] [2021-06-05 16:31:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:40,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:40,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485169523] [2021-06-05 16:31:40,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485169523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:40,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071399407] [2021-06-05 16:31:40,816 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:40,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:31:40,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:40,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:31:40,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:41,276 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 16:31:41,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:41,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:31:41,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:41,818 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 122 [2021-06-05 16:31:41,818 INFO L628 ElimStorePlain]: treesize reduction 130, result has 76.3 percent of original size [2021-06-05 16:31:41,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:41,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 32 [2021-06-05 16:31:41,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:41,853 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:31:41,853 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:31:41,854 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:42,140 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 119 [2021-06-05 16:31:42,141 INFO L628 ElimStorePlain]: treesize reduction 23, result has 94.1 percent of original size [2021-06-05 16:31:42,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:42,162 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:31:42,164 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:42,178 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:31:42,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:31:42,179 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:42,301 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 16:31:42,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:42,323 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:31:42,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:31:42,327 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:42,440 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 16:31:42,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:42,459 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:31:42,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:31:42,461 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:42,571 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 16:31:42,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:42,592 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:31:42,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:31:42,594 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:42,719 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:31:42,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:42,737 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:31:42,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:31:42,739 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:42,847 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 16:31:42,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:42,865 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:31:42,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:31:42,869 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:42,972 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 16:31:42,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:42,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:31:42,985 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:563, output treesize:350 [2021-06-05 16:31:43,122 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-06-05 16:31:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:43,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071399407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:43,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:43,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:31:43,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697672013] [2021-06-05 16:31:43,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:31:43,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:43,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:31:43,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:31:43,280 INFO L87 Difference]: Start difference. First operand 1720 states and 5869 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) [2021-06-05 16:31:43,615 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-05 16:31:43,856 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 42 [2021-06-05 16:31:44,560 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-06-05 16:31:44,701 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-06-05 16:31:45,199 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-05 16:31:45,392 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-05 16:31:45,755 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-06-05 16:31:46,136 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2021-06-05 16:31:46,326 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 16:31:46,733 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2021-06-05 16:31:47,302 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 89 [2021-06-05 16:31:47,770 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 96 [2021-06-05 16:31:48,288 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 80 [2021-06-05 16:31:48,888 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 88 [2021-06-05 16:31:49,569 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 101 [2021-06-05 16:31:50,158 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 88 [2021-06-05 16:31:50,959 WARN L205 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 100 [2021-06-05 16:31:51,122 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2021-06-05 16:31:51,705 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 87 [2021-06-05 16:31:52,374 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 95 [2021-06-05 16:31:52,783 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-06-05 16:31:52,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:52,869 INFO L93 Difference]: Finished difference Result 3224 states and 10085 transitions. [2021-06-05 16:31:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:31:52,869 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 [2021-06-05 16:31:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:52,874 INFO L225 Difference]: With dead ends: 3224 [2021-06-05 16:31:52,874 INFO L226 Difference]: Without dead ends: 3167 [2021-06-05 16:31:52,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 9515.5ms TimeCoverageRelationStatistics Valid=578, Invalid=2614, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:31:52,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2021-06-05 16:31:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 1704. [2021-06-05 16:31:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1703 states have (on average 3.405754550792719) internal successors, (5800), 1703 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 5800 transitions. [2021-06-05 16:31:52,898 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 5800 transitions. Word has length 26 [2021-06-05 16:31:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:52,899 INFO L482 AbstractCegarLoop]: Abstraction has 1704 states and 5800 transitions. [2021-06-05 16:31:52,899 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) [2021-06-05 16:31:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 5800 transitions. [2021-06-05 16:31:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:52,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:52,901 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:53,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1871 [2021-06-05 16:31:53,105 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:53,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:53,105 INFO L82 PathProgramCache]: Analyzing trace with hash 745320095, now seen corresponding path program 46 times [2021-06-05 16:31:53,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:53,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392142473] [2021-06-05 16:31:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:53,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:53,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392142473] [2021-06-05 16:31:53,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392142473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:53,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115388163] [2021-06-05 16:31:53,375 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 [2021-06-05 16:31:53,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:31:53,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:53,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:31:53,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:53,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,877 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 [2021-06-05 16:31:53,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:53,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:31:53,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:53,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,899 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 [2021-06-05 16:31:53,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:53,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,909 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 39 treesize of output 13 [2021-06-05 16:31:53,910 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:53,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,920 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 34 treesize of output 16 [2021-06-05 16:31:53,921 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:53,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:31:53,932 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:53,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 16:31:53,943 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:53,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,953 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 [2021-06-05 16:31:53,954 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:53,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:31:53,964 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:53,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,974 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 35 treesize of output 19 [2021-06-05 16:31:53,975 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:53,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,984 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:31:53,985 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:53,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:53,994 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 [2021-06-05 16:31:53,994 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:53,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:53,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:54,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:54,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:54,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:54,003 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 [2021-06-05 16:31:54,003 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:54,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:54,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:54,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:54,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:54,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:54,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:54,011 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:31:54,012 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:54,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:54,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:54,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:54,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:54,016 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 30 treesize of output 16 [2021-06-05 16:31:54,017 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:54,044 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:31:54,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:31:54,045 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:31:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:54,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115388163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:54,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:54,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 16:31:54,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723266267] [2021-06-05 16:31:54,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:31:54,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:54,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:31:54,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:31:54,079 INFO L87 Difference]: Start difference. First operand 1704 states and 5800 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) [2021-06-05 16:31:55,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:55,791 INFO L93 Difference]: Finished difference Result 3325 states and 10680 transitions. [2021-06-05 16:31:55,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:31:55,791 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 [2021-06-05 16:31:55,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:55,796 INFO L225 Difference]: With dead ends: 3325 [2021-06-05 16:31:55,796 INFO L226 Difference]: Without dead ends: 3289 [2021-06-05 16:31:55,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1669.5ms TimeCoverageRelationStatistics Valid=497, Invalid=2259, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:31:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3289 states. [2021-06-05 16:31:55,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3289 to 1811. [2021-06-05 16:31:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.422099447513812) internal successors, (6194), 1810 states have internal predecessors, (6194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:55,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6194 transitions. [2021-06-05 16:31:55,825 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6194 transitions. Word has length 26 [2021-06-05 16:31:55,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:55,825 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6194 transitions. [2021-06-05 16:31:55,825 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) [2021-06-05 16:31:55,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6194 transitions. [2021-06-05 16:31:55,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:55,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:55,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:56,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1907 [2021-06-05 16:31:56,041 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:56,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:56,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1715998549, now seen corresponding path program 47 times [2021-06-05 16:31:56,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:56,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311799558] [2021-06-05 16:31:56,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:56,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:56,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311799558] [2021-06-05 16:31:56,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311799558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:56,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16134545] [2021-06-05 16:31:56,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:56,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:31:56,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:56,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:31:56,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:56,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,755 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:31:56,755 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 [2021-06-05 16:31:56,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:56,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,774 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:31:56,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:31:56,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:56,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,789 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:31:56,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:31:56,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:56,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,805 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:31:56,805 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 [2021-06-05 16:31:56,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:56,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,828 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 16:31:56,828 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 25 [2021-06-05 16:31:56,829 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:56,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,867 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:31:56,867 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 [2021-06-05 16:31:56,871 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:56,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,886 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:31:56,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:31:56,887 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:56,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:56,911 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 [2021-06-05 16:31:56,917 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:56,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,935 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:31:56,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:31:56,936 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:56,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,965 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:31:56,965 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 [2021-06-05 16:31:56,967 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:56,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,987 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:31:56,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:31:56,988 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:56,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:56,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:57,007 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:31:57,007 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 [2021-06-05 16:31:57,008 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:57,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:57,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:57,026 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:31:57,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:31:57,027 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:57,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:57,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:57,044 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:31:57,045 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 [2021-06-05 16:31:57,045 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:57,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:57,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:57,066 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-06-05 16:31:57,067 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 23 [2021-06-05 16:31:57,068 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:57,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:57,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:57,076 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:31:57,076 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 [2021-06-05 16:31:57,077 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:57,158 INFO L628 ElimStorePlain]: treesize reduction 24, result has 79.5 percent of original size [2021-06-05 16:31:57,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:31:57,160 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-06-05 16:31:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:57,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16134545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:57,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:57,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 16:31:57,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37447886] [2021-06-05 16:31:57,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:31:57,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:57,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:31:57,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:31:57,240 INFO L87 Difference]: Start difference. First operand 1811 states and 6194 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) [2021-06-05 16:31:59,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:59,660 INFO L93 Difference]: Finished difference Result 3806 states and 12114 transitions. [2021-06-05 16:31:59,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:31:59,661 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 [2021-06-05 16:31:59,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:59,666 INFO L225 Difference]: With dead ends: 3806 [2021-06-05 16:31:59,666 INFO L226 Difference]: Without dead ends: 3749 [2021-06-05 16:31:59,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 2213.3ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:31:59,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3749 states. [2021-06-05 16:31:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3749 to 1846. [2021-06-05 16:31:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1845 states have (on average 3.430894308943089) internal successors, (6330), 1845 states have internal predecessors, (6330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 6330 transitions. [2021-06-05 16:31:59,697 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 6330 transitions. Word has length 26 [2021-06-05 16:31:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:59,697 INFO L482 AbstractCegarLoop]: Abstraction has 1846 states and 6330 transitions. [2021-06-05 16:31:59,697 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) [2021-06-05 16:31:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 6330 transitions. [2021-06-05 16:31:59,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:59,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:59,699 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:59,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1997,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:59,900 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:59,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:59,900 INFO L82 PathProgramCache]: Analyzing trace with hash 701456227, now seen corresponding path program 27 times [2021-06-05 16:31:59,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:59,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073394289] [2021-06-05 16:31:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:00,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:00,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073394289] [2021-06-05 16:32:00,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073394289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:00,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393470989] [2021-06-05 16:32:00,325 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 [2021-06-05 16:32:00,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:32:00,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:00,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:32:00,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:00,766 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:32:00,971 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 16:32:01,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:01,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 [2021-06-05 16:32:01,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:01,157 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:32:01,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-06-05 16:32:01,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:01,480 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 126 [2021-06-05 16:32:01,481 INFO L628 ElimStorePlain]: treesize reduction 120, result has 76.0 percent of original size [2021-06-05 16:32:01,503 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:32:01,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:32:01,505 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:01,669 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:32:01,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:01,690 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:32:01,690 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 16:32:01,709 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:01,854 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 16:32:01,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:01,874 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:32:01,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:32:01,875 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:02,014 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:32:02,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:02,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:02,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:32:02,037 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:02,047 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:32:02,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 16 [2021-06-05 16:32:02,048 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:02,288 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 106 [2021-06-05 16:32:02,288 INFO L628 ElimStorePlain]: treesize reduction 23, result has 92.7 percent of original size [2021-06-05 16:32:02,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:02,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:32:02,308 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:02,416 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 16:32:02,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:02,433 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:32:02,434 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:32:02,435 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:02,542 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 16:32:02,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:02,560 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:32:02,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:32:02,563 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:02,667 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 16:32:02,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:02,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:32:02,680 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:563, output treesize:347 [2021-06-05 16:32:02,846 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-06-05 16:32:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:02,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393470989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:02,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:02,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:32:02,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056554330] [2021-06-05 16:32:02,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:32:02,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:02,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:32:02,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:32:02,895 INFO L87 Difference]: Start difference. First operand 1846 states and 6330 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) [2021-06-05 16:32:04,120 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-05 16:32:04,340 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 16:32:04,543 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-06-05 16:32:04,823 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 16:32:05,347 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 121 [2021-06-05 16:32:05,773 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 104 [2021-06-05 16:32:06,363 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2021-06-05 16:32:07,063 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 139 [2021-06-05 16:32:07,650 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 116 [2021-06-05 16:32:07,907 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 79 [2021-06-05 16:32:08,865 WARN L205 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 133 [2021-06-05 16:32:09,317 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 81 [2021-06-05 16:32:09,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:09,590 INFO L93 Difference]: Finished difference Result 2649 states and 8646 transitions. [2021-06-05 16:32:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:32:09,591 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 [2021-06-05 16:32:09,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:09,594 INFO L225 Difference]: With dead ends: 2649 [2021-06-05 16:32:09,594 INFO L226 Difference]: Without dead ends: 2604 [2021-06-05 16:32:09,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 6641.3ms TimeCoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:32:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-06-05 16:32:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 1868. [2021-06-05 16:32:09,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 3.430637386181039) internal successors, (6405), 1867 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:09,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 6405 transitions. [2021-06-05 16:32:09,619 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 6405 transitions. Word has length 26 [2021-06-05 16:32:09,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:09,619 INFO L482 AbstractCegarLoop]: Abstraction has 1868 states and 6405 transitions. [2021-06-05 16:32:09,619 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) [2021-06-05 16:32:09,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 6405 transitions. [2021-06-05 16:32:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:09,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:09,621 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:09,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2102 [2021-06-05 16:32:09,822 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:09,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:09,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1121995759, now seen corresponding path program 28 times [2021-06-05 16:32:09,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:09,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074673902] [2021-06-05 16:32:09,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:10,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:10,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074673902] [2021-06-05 16:32:10,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074673902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:10,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246442447] [2021-06-05 16:32:10,123 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 [2021-06-05 16:32:10,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:32:10,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:10,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:32:10,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:10,485 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-06-05 16:32:10,597 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_174, v_prenex_175, v_prenex_176, v_prenex_177], 3=[A]} [2021-06-05 16:32:10,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:10,611 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:10,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-06-05 16:32:10,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:10,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:10,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:10,624 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 30 treesize of output 24 [2021-06-05 16:32:10,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:10,942 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-06-05 16:32:10,942 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.7 percent of original size [2021-06-05 16:32:10,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:10,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:10,958 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 26 treesize of output 24 [2021-06-05 16:32:10,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:10,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:10,970 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:10,970 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 [2021-06-05 16:32:10,972 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:11,116 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 16:32:11,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:11,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:11,130 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:11,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:32:11,132 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:11,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:11,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:11,142 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 [2021-06-05 16:32:11,146 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:11,269 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 16:32:11,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:11,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:11,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:11,296 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 30 treesize of output 24 [2021-06-05 16:32:11,299 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:11,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:11,308 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:11,308 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 20 [2021-06-05 16:32:11,309 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:11,423 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 16:32:11,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:11,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:11,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:11,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:11,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:32:11,438 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:11,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:11,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:11,447 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 16:32:11,448 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 [2021-06-05 16:32:11,449 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:11,552 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 16:32:11,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:11,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:32:11,558 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:421, output treesize:185 [2021-06-05 16:32:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:11,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246442447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:11,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:11,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:32:11,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544870600] [2021-06-05 16:32:11,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:32:11,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:11,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:32:11,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:32:11,692 INFO L87 Difference]: Start difference. First operand 1868 states and 6405 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) [2021-06-05 16:32:12,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:12,900 INFO L93 Difference]: Finished difference Result 2435 states and 8167 transitions. [2021-06-05 16:32:12,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:32:12,900 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 [2021-06-05 16:32:12,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:12,904 INFO L225 Difference]: With dead ends: 2435 [2021-06-05 16:32:12,904 INFO L226 Difference]: Without dead ends: 2410 [2021-06-05 16:32:12,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1460.2ms TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:32:12,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-06-05 16:32:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1870. [2021-06-05 16:32:12,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.42964151952916) internal successors, (6410), 1869 states have internal predecessors, (6410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:12,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6410 transitions. [2021-06-05 16:32:12,925 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6410 transitions. Word has length 26 [2021-06-05 16:32:12,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:12,925 INFO L482 AbstractCegarLoop]: Abstraction has 1870 states and 6410 transitions. [2021-06-05 16:32:12,925 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) [2021-06-05 16:32:12,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6410 transitions. [2021-06-05 16:32:12,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:12,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:12,928 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:13,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2139,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:13,128 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:13,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:13,129 INFO L82 PathProgramCache]: Analyzing trace with hash 654380625, now seen corresponding path program 29 times [2021-06-05 16:32:13,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:13,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697281837] [2021-06-05 16:32:13,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:13,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:13,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697281837] [2021-06-05 16:32:13,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697281837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:13,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926863885] [2021-06-05 16:32:13,493 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 [2021-06-05 16:32:13,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:32:13,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:13,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:32:13,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:14,036 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 16:32:14,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:14,136 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:14,137 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 [2021-06-05 16:32:14,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:14,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:14,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:14,151 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 [2021-06-05 16:32:14,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:14,501 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 125 [2021-06-05 16:32:14,502 INFO L628 ElimStorePlain]: treesize reduction 72, result has 84.8 percent of original size [2021-06-05 16:32:14,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:14,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:14,518 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 24 [2021-06-05 16:32:14,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:14,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:14,531 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:14,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-06-05 16:32:14,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:14,809 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2021-06-05 16:32:14,810 INFO L628 ElimStorePlain]: treesize reduction 21, result has 94.2 percent of original size [2021-06-05 16:32:14,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:14,823 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:14,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:32:14,825 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:14,956 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:32:14,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:14,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:14,970 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:14,970 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 [2021-06-05 16:32:14,972 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:15,101 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 16:32:15,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:15,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:15,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:15,114 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 [2021-06-05 16:32:15,118 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:15,251 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 16:32:15,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:15,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:15,263 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:15,263 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 [2021-06-05 16:32:15,265 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:15,381 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:32:15,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:15,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:15,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:15,392 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 [2021-06-05 16:32:15,395 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:15,508 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 16:32:15,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:15,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:15,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:15,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-06-05 16:32:15,523 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:15,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:15,532 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:15,532 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 30 treesize of output 1 [2021-06-05 16:32:15,533 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:15,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:15,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:32:15,627 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:539, output treesize:156 [2021-06-05 16:32:15,778 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-06-05 16:32:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:15,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926863885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:15,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:15,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:32:15,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972321556] [2021-06-05 16:32:15,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:32:15,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:15,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:32:15,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:32:15,819 INFO L87 Difference]: Start difference. First operand 1870 states and 6410 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) [2021-06-05 16:32:16,736 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-06-05 16:32:17,143 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-05 16:32:17,419 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 16:32:17,633 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 16:32:17,876 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 16:32:18,105 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 16:32:18,246 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-06-05 16:32:18,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:18,327 INFO L93 Difference]: Finished difference Result 2744 states and 8990 transitions. [2021-06-05 16:32:18,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:32:18,327 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 [2021-06-05 16:32:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:18,331 INFO L225 Difference]: With dead ends: 2744 [2021-06-05 16:32:18,331 INFO L226 Difference]: Without dead ends: 2710 [2021-06-05 16:32:18,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 2881.7ms TimeCoverageRelationStatistics Valid=307, Invalid=1333, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:32:18,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2021-06-05 16:32:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 1870. [2021-06-05 16:32:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.4307116104868913) internal successors, (6412), 1869 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6412 transitions. [2021-06-05 16:32:18,357 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6412 transitions. Word has length 26 [2021-06-05 16:32:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:18,357 INFO L482 AbstractCegarLoop]: Abstraction has 1870 states and 6412 transitions. [2021-06-05 16:32:18,357 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) [2021-06-05 16:32:18,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6412 transitions. [2021-06-05 16:32:18,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:18,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:18,359 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:18,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2176,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:18,560 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:18,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:18,560 INFO L82 PathProgramCache]: Analyzing trace with hash -275202939, now seen corresponding path program 48 times [2021-06-05 16:32:18,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:18,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160519858] [2021-06-05 16:32:18,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:18,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:18,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160519858] [2021-06-05 16:32:18,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160519858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:18,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593386166] [2021-06-05 16:32:18,863 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 [2021-06-05 16:32:18,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:32:18,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:18,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:32:18,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:19,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:19,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,375 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 [2021-06-05 16:32:19,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:19,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:19,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,385 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 32 treesize of output 16 [2021-06-05 16:32:19,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:19,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:19,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,395 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 [2021-06-05 16:32:19,396 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:19,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:19,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,406 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 [2021-06-05 16:32:19,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:19,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:19,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,416 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 [2021-06-05 16:32:19,417 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:19,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:19,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:32:19,427 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:19,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:19,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:32:19,437 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:19,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:19,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,446 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 35 treesize of output 19 [2021-06-05 16:32:19,447 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:19,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:19,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,456 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 [2021-06-05 16:32:19,456 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:19,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:19,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,465 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 34 treesize of output 16 [2021-06-05 16:32:19,466 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:19,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:19,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,474 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 [2021-06-05 16:32:19,475 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:19,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:19,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,484 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 [2021-06-05 16:32:19,484 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:19,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:19,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,493 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 41 treesize of output 16 [2021-06-05 16:32:19,493 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:19,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:19,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,501 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 33 treesize of output 13 [2021-06-05 16:32:19,503 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:19,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:19,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:19,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:32:19,507 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:19,529 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:32:19,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:32:19,531 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:32:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:19,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593386166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:19,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:19,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:32:19,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144358834] [2021-06-05 16:32:19,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:32:19,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:19,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:32:19,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:32:19,555 INFO L87 Difference]: Start difference. First operand 1870 states and 6412 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) [2021-06-05 16:32:21,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:21,129 INFO L93 Difference]: Finished difference Result 2342 states and 7805 transitions. [2021-06-05 16:32:21,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:32:21,129 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 [2021-06-05 16:32:21,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:21,143 INFO L225 Difference]: With dead ends: 2342 [2021-06-05 16:32:21,143 INFO L226 Difference]: Without dead ends: 2320 [2021-06-05 16:32:21,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1630.0ms TimeCoverageRelationStatistics Valid=359, Invalid=1533, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:32:21,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-05 16:32:21,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1866. [2021-06-05 16:32:21,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.429490616621984) internal successors, (6396), 1865 states have internal predecessors, (6396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:21,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6396 transitions. [2021-06-05 16:32:21,165 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6396 transitions. Word has length 26 [2021-06-05 16:32:21,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:21,165 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 6396 transitions. [2021-06-05 16:32:21,165 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) [2021-06-05 16:32:21,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6396 transitions. [2021-06-05 16:32:21,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:21,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:21,167 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:21,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2203 [2021-06-05 16:32:21,368 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:21,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:21,368 INFO L82 PathProgramCache]: Analyzing trace with hash 650290927, now seen corresponding path program 49 times [2021-06-05 16:32:21,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:21,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891366263] [2021-06-05 16:32:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:21,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:21,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891366263] [2021-06-05 16:32:21,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891366263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:21,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525023620] [2021-06-05 16:32:21,614 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 [2021-06-05 16:32:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:21,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:32:21,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:21,942 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_196], 5=[v_prenex_198, v_prenex_200]} [2021-06-05 16:32:21,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:21,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:21,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:21,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:21,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:32:21,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:21,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:21,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:32:21,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:22,046 INFO L628 ElimStorePlain]: treesize reduction 130, result has 40.1 percent of original size [2021-06-05 16:32:22,047 INFO L518 ElimStorePlain]: Eliminatee v_prenex_196 vanished before elimination [2021-06-05 16:32:22,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:22,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:22,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:22,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:32:22,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:22,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:22,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:22,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:22,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:22,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:22,079 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 [2021-06-05 16:32:22,080 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:22,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:22,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:32:22,100 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:29 [2021-06-05 16:32:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:22,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525023620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:22,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:22,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:32:22,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880729692] [2021-06-05 16:32:22,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:32:22,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:22,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:32:22,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:32:22,139 INFO L87 Difference]: Start difference. First operand 1866 states and 6396 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) [2021-06-05 16:32:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:23,541 INFO L93 Difference]: Finished difference Result 2566 states and 8529 transitions. [2021-06-05 16:32:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:32:23,541 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 [2021-06-05 16:32:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:23,544 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 16:32:23,544 INFO L226 Difference]: Without dead ends: 2551 [2021-06-05 16:32:23,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1391.3ms TimeCoverageRelationStatistics Valid=321, Invalid=1319, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:32:23,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-06-05 16:32:23,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 1866. [2021-06-05 16:32:23,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.429490616621984) internal successors, (6396), 1865 states have internal predecessors, (6396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6396 transitions. [2021-06-05 16:32:23,567 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6396 transitions. Word has length 26 [2021-06-05 16:32:23,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:23,567 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 6396 transitions. [2021-06-05 16:32:23,567 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) [2021-06-05 16:32:23,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6396 transitions. [2021-06-05 16:32:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:23,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:23,569 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:23,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2299 [2021-06-05 16:32:23,769 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:23,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:23,770 INFO L82 PathProgramCache]: Analyzing trace with hash -527613613, now seen corresponding path program 50 times [2021-06-05 16:32:23,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:23,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723738502] [2021-06-05 16:32:23,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:24,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:24,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723738502] [2021-06-05 16:32:24,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723738502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:24,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93419170] [2021-06-05 16:32:24,108 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 [2021-06-05 16:32:24,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:32:24,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:24,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:32:24,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:24,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,361 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:32:24,361 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 30 [2021-06-05 16:32:24,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:24,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,387 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:32:24,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:32:24,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:24,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,414 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-05 16:32:24,414 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 37 [2021-06-05 16:32:24,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:24,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,433 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:32:24,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:32:24,433 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:24,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,458 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-05 16:32:24,459 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 [2021-06-05 16:32:24,462 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:24,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,487 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-06-05 16:32:24,487 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 41 treesize of output 29 [2021-06-05 16:32:24,489 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:24,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,504 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:32:24,504 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 [2021-06-05 16:32:24,505 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:24,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,528 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 16:32:24,528 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 [2021-06-05 16:32:24,529 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:24,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,545 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:32:24,545 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 [2021-06-05 16:32:24,545 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:24,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,570 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-05 16:32:24,570 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 26 [2021-06-05 16:32:24,571 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:24,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,595 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-05 16:32:24,595 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 26 [2021-06-05 16:32:24,596 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:24,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,613 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:32:24,613 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 [2021-06-05 16:32:24,613 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:24,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,628 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:32:24,629 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 [2021-06-05 16:32:24,629 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:24,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,651 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 16:32:24,651 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 [2021-06-05 16:32:24,652 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:24,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:24,676 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 43 [2021-06-05 16:32:24,682 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:24,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:24,691 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:32:24,691 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 [2021-06-05 16:32:24,692 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:24,773 INFO L628 ElimStorePlain]: treesize reduction 109, result has 41.7 percent of original size [2021-06-05 16:32:24,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:32:24,774 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:705, output treesize:78 [2021-06-05 16:32:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:24,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93419170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:24,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:24,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-05 16:32:24,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446001926] [2021-06-05 16:32:24,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:32:24,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:24,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:32:24,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:32:24,858 INFO L87 Difference]: Start difference. First operand 1866 states and 6396 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) [2021-06-05 16:32:26,524 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-05 16:32:26,828 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-06-05 16:32:27,539 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-06-05 16:32:29,106 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-05 16:32:29,809 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-06-05 16:32:30,077 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-06-05 16:32:30,460 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-06-05 16:32:30,906 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-05 16:32:31,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:31,405 INFO L93 Difference]: Finished difference Result 3357 states and 10803 transitions. [2021-06-05 16:32:31,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 16:32:31,405 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 [2021-06-05 16:32:31,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:31,410 INFO L225 Difference]: With dead ends: 3357 [2021-06-05 16:32:31,410 INFO L226 Difference]: Without dead ends: 3310 [2021-06-05 16:32:31,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 5722.7ms TimeCoverageRelationStatistics Valid=1266, Invalid=7106, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 16:32:31,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-06-05 16:32:31,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 1970. [2021-06-05 16:32:31,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 3.420518029456577) internal successors, (6735), 1969 states have internal predecessors, (6735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 6735 transitions. [2021-06-05 16:32:31,441 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 6735 transitions. Word has length 26 [2021-06-05 16:32:31,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:31,442 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 6735 transitions. [2021-06-05 16:32:31,442 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) [2021-06-05 16:32:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 6735 transitions. [2021-06-05 16:32:31,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:31,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:31,444 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:31,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2313,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:31,645 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:31,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:31,646 INFO L82 PathProgramCache]: Analyzing trace with hash -2073850769, now seen corresponding path program 51 times [2021-06-05 16:32:31,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:31,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879593399] [2021-06-05 16:32:31,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:31,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:31,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879593399] [2021-06-05 16:32:31,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879593399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:31,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667479352] [2021-06-05 16:32:31,912 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 [2021-06-05 16:32:31,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:32:31,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:31,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:32:31,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:32,412 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-06-05 16:32:32,646 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_206, v_prenex_208, v_prenex_210, v_prenex_212, v_prenex_202, v_prenex_214], 6=[A, v_prenex_204]} [2021-06-05 16:32:32,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,699 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 16:32:32,700 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 32 [2021-06-05 16:32:32,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:32,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,753 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-06-05 16:32:32,753 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 37 treesize of output 39 [2021-06-05 16:32:32,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:33,190 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-05 16:32:33,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:33,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,237 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-06-05 16:32:33,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 43 [2021-06-05 16:32:33,241 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:33,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,275 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-06-05 16:32:33,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 36 [2021-06-05 16:32:33,279 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:33,672 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 16:32:33,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:33,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,716 INFO L354 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2021-06-05 16:32:33,716 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 28 treesize of output 34 [2021-06-05 16:32:33,727 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:33,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,772 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-06-05 16:32:33,772 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 33 treesize of output 47 [2021-06-05 16:32:33,776 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:34,162 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-05 16:32:34,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:34,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:34,209 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-06-05 16:32:34,210 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 43 [2021-06-05 16:32:34,214 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:34,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:34,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:34,247 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 55 [2021-06-05 16:32:34,255 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:35,312 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 161 DAG size of output: 150 [2021-06-05 16:32:35,312 INFO L628 ElimStorePlain]: treesize reduction 72, result has 90.2 percent of original size [2021-06-05 16:32:35,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:35,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:35,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 55 [2021-06-05 16:32:35,354 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:35,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:35,391 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-06-05 16:32:35,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 43 [2021-06-05 16:32:35,395 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:36,043 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 147 [2021-06-05 16:32:36,044 INFO L628 ElimStorePlain]: treesize reduction 34, result has 94.9 percent of original size [2021-06-05 16:32:36,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:36,086 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-06-05 16:32:36,086 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 35 treesize of output 43 [2021-06-05 16:32:36,090 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:36,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:36,115 INFO L354 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2021-06-05 16:32:36,116 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 35 treesize of output 28 [2021-06-05 16:32:36,117 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:36,439 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 16:32:36,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:36,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:36,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:36,476 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-06-05 16:32:36,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 38 [2021-06-05 16:32:36,481 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:36,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:36,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:36,495 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:32:36,496 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 [2021-06-05 16:32:36,496 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:36,765 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 16:32:36,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:36,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:36,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:36,801 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-06-05 16:32:36,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 38 [2021-06-05 16:32:36,805 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:36,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:36,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:36,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:36,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 16:32:36,837 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:37,076 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 16:32:37,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:37,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-06-05 16:32:37,101 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:829, output treesize:777 [2021-06-05 16:32:37,478 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 41 [2021-06-05 16:32:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:37,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667479352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:37,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:37,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 16:32:37,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177774024] [2021-06-05 16:32:37,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:32:37,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:37,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:32:37,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:32:37,635 INFO L87 Difference]: Start difference. First operand 1970 states and 6735 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:38,677 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-05 16:32:39,265 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-06-05 16:32:39,746 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-05 16:32:40,458 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-06-05 16:32:40,705 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-06-05 16:32:44,457 WARN L205 SmtUtils]: Spent 3.68 s on a formula simplification. DAG size of input: 119 DAG size of output: 79 [2021-06-05 16:32:44,698 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-05 16:32:44,940 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 16:32:45,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:45,436 INFO L93 Difference]: Finished difference Result 3232 states and 10559 transitions. [2021-06-05 16:32:45,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:32:45,436 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:32:45,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:45,440 INFO L225 Difference]: With dead ends: 3232 [2021-06-05 16:32:45,441 INFO L226 Difference]: Without dead ends: 3187 [2021-06-05 16:32:45,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 8225.6ms TimeCoverageRelationStatistics Valid=609, Invalid=2931, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:32:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-06-05 16:32:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 2005. [2021-06-05 16:32:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 3.4266467065868262) internal successors, (6867), 2004 states have internal predecessors, (6867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:45,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 6867 transitions. [2021-06-05 16:32:45,471 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 6867 transitions. Word has length 26 [2021-06-05 16:32:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:45,471 INFO L482 AbstractCegarLoop]: Abstraction has 2005 states and 6867 transitions. [2021-06-05 16:32:45,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 6867 transitions. [2021-06-05 16:32:45,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:45,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:45,473 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:45,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2342 [2021-06-05 16:32:45,674 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:45,674 INFO L82 PathProgramCache]: Analyzing trace with hash 436262311, now seen corresponding path program 52 times [2021-06-05 16:32:45,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:45,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281074110] [2021-06-05 16:32:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:45,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:45,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281074110] [2021-06-05 16:32:45,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281074110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:45,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178640983] [2021-06-05 16:32:45,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:46,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:32:46,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:46,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:32:46,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:46,450 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_226], 5=[v_prenex_222, v_prenex_224]} [2021-06-05 16:32:46,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:46,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:46,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:46,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:32:46,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:46,543 INFO L628 ElimStorePlain]: treesize reduction 137, result has 41.9 percent of original size [2021-06-05 16:32:46,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:46,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:46,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:32:46,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:46,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:46,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:46,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:46,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:46,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:46,579 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 16:32:46,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:46,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:46,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:46,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:32:46,606 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:46,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:46,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:32:46,628 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:22 [2021-06-05 16:32:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:46,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178640983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:46,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:46,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:32:46,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686466429] [2021-06-05 16:32:46,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:32:46,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:46,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:32:46,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:32:46,664 INFO L87 Difference]: Start difference. First operand 2005 states and 6867 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) [2021-06-05 16:32:48,864 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-05 16:32:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:49,446 INFO L93 Difference]: Finished difference Result 2655 states and 8819 transitions. [2021-06-05 16:32:49,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:32:49,447 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 [2021-06-05 16:32:49,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:49,451 INFO L225 Difference]: With dead ends: 2655 [2021-06-05 16:32:49,451 INFO L226 Difference]: Without dead ends: 2640 [2021-06-05 16:32:49,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 2491.8ms TimeCoverageRelationStatistics Valid=482, Invalid=2170, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:32:49,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-06-05 16:32:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2003. [2021-06-05 16:32:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.4265734265734267) internal successors, (6860), 2002 states have internal predecessors, (6860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6860 transitions. [2021-06-05 16:32:49,476 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6860 transitions. Word has length 26 [2021-06-05 16:32:49,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:49,476 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 6860 transitions. [2021-06-05 16:32:49,476 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) [2021-06-05 16:32:49,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6860 transitions. [2021-06-05 16:32:49,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:49,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:49,479 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:49,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2427,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:49,679 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:49,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:49,679 INFO L82 PathProgramCache]: Analyzing trace with hash 2135160291, now seen corresponding path program 53 times [2021-06-05 16:32:49,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:49,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804092794] [2021-06-05 16:32:49,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:49,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:49,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804092794] [2021-06-05 16:32:49,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804092794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:49,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071070507] [2021-06-05 16:32:49,947 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 [2021-06-05 16:32:49,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:32:49,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:49,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:32:49,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:50,362 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 16:32:50,547 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 16:32:50,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:50,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:50,797 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:32:50,798 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 [2021-06-05 16:32:50,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:50,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:50,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:50,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:50,826 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 [2021-06-05 16:32:50,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:51,212 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-05 16:32:51,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:51,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:51,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:51,248 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:32:51,248 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 [2021-06-05 16:32:51,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:51,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:51,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:51,279 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:32:51,279 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 35 treesize of output 35 [2021-06-05 16:32:51,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:51,936 WARN L205 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 148 [2021-06-05 16:32:51,936 INFO L628 ElimStorePlain]: treesize reduction 29, result has 95.9 percent of original size [2021-06-05 16:32:51,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:51,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:51,972 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:32:51,973 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 [2021-06-05 16:32:51,976 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:51,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:51,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:52,003 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 16:32:52,003 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 [2021-06-05 16:32:52,004 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:52,297 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 16:32:52,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:52,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:52,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:52,331 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:32:52,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-05 16:32:52,335 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:52,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:52,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:52,371 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 16:32:52,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:32:52,375 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:52,649 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 16:32:52,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:52,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:52,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:52,684 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:32:52,684 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 [2021-06-05 16:32:52,686 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:52,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:52,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:52,711 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:32:52,711 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 [2021-06-05 16:32:52,713 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:52,989 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 16:32:52,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:52,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:52,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:53,024 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:32:53,025 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 [2021-06-05 16:32:53,027 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:53,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:53,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:53,049 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:32:53,049 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 [2021-06-05 16:32:53,051 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:53,301 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 16:32:53,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:53,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:53,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:53,330 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:32:53,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:32:53,332 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:53,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:53,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:53,355 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:32:53,356 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 [2021-06-05 16:32:53,360 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:53,794 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 104 [2021-06-05 16:32:53,794 INFO L628 ElimStorePlain]: treesize reduction 29, result has 93.8 percent of original size [2021-06-05 16:32:53,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:53,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:53,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:53,825 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 [2021-06-05 16:32:53,832 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:53,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:53,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:53,845 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:32:53,846 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 41 treesize of output 1 [2021-06-05 16:32:53,846 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:54,027 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 16:32:54,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:54,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 16:32:54,046 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:793, output treesize:352 [2021-06-05 16:32:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:54,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071070507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:54,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:54,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 16:32:54,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487586948] [2021-06-05 16:32:54,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:32:54,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:54,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:32:54,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:32:54,210 INFO L87 Difference]: Start difference. First operand 2003 states and 6860 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:58,193 WARN L205 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-05 16:32:58,947 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-06-05 16:32:59,991 WARN L205 SmtUtils]: Spent 973.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 115 [2021-06-05 16:33:00,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:00,557 INFO L93 Difference]: Finished difference Result 2890 states and 9570 transitions. [2021-06-05 16:33:00,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:33:00,557 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:00,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:00,561 INFO L225 Difference]: With dead ends: 2890 [2021-06-05 16:33:00,561 INFO L226 Difference]: Without dead ends: 2860 [2021-06-05 16:33:00,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 6597.4ms TimeCoverageRelationStatistics Valid=522, Invalid=2448, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:33:00,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-06-05 16:33:00,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 2003. [2021-06-05 16:33:00,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.4265734265734267) internal successors, (6860), 2002 states have internal predecessors, (6860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:00,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6860 transitions. [2021-06-05 16:33:00,588 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6860 transitions. Word has length 26 [2021-06-05 16:33:00,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:00,588 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 6860 transitions. [2021-06-05 16:33:00,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:00,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6860 transitions. [2021-06-05 16:33:00,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:00,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:00,591 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:00,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2441 [2021-06-05 16:33:00,792 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:00,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:00,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1001444339, now seen corresponding path program 54 times [2021-06-05 16:33:00,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:00,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655156912] [2021-06-05 16:33:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:01,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:01,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655156912] [2021-06-05 16:33:01,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655156912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:01,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024681195] [2021-06-05 16:33:01,031 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 [2021-06-05 16:33:01,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:33:01,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:01,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:33:01,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:01,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:01,284 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 [2021-06-05 16:33:01,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,315 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:33:01,315 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 31 [2021-06-05 16:33:01,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,343 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-06-05 16:33:01,343 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 [2021-06-05 16:33:01,344 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,360 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:33:01,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:01,360 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,384 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 16:33:01,384 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 [2021-06-05 16:33:01,385 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,400 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:33:01,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:01,401 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,415 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:33:01,416 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 [2021-06-05 16:33:01,416 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,431 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:33:01,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:01,432 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,457 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 16:33:01,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:01,459 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,475 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:33:01,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:01,476 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,501 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:33:01,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:01,505 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,529 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 16:33:01,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:01,530 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,545 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:33:01,545 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 [2021-06-05 16:33:01,546 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,560 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:33:01,560 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 [2021-06-05 16:33:01,561 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,575 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:33:01,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:01,576 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,584 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:33:01,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 16:33:01,585 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,658 INFO L628 ElimStorePlain]: treesize reduction 42, result has 65.0 percent of original size [2021-06-05 16:33:01,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:33:01,659 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:78 [2021-06-05 16:33:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:01,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024681195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:01,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:01,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:33:01,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063268412] [2021-06-05 16:33:01,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:01,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:01,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:01,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:01,744 INFO L87 Difference]: Start difference. First operand 2003 states and 6860 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) [2021-06-05 16:33:03,180 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-06-05 16:33:03,755 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-06-05 16:33:04,173 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-06-05 16:33:04,418 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2021-06-05 16:33:04,674 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-05 16:33:05,008 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2021-06-05 16:33:05,616 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-06-05 16:33:05,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:05,690 INFO L93 Difference]: Finished difference Result 3566 states and 11484 transitions. [2021-06-05 16:33:05,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:33:05,690 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 [2021-06-05 16:33:05,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:05,695 INFO L225 Difference]: With dead ends: 3566 [2021-06-05 16:33:05,695 INFO L226 Difference]: Without dead ends: 3532 [2021-06-05 16:33:05,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 3598.4ms TimeCoverageRelationStatistics Valid=879, Invalid=3153, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:33:05,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3532 states. [2021-06-05 16:33:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3532 to 2009. [2021-06-05 16:33:05,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 3.431772908366534) internal successors, (6891), 2008 states have internal predecessors, (6891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:05,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 6891 transitions. [2021-06-05 16:33:05,727 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 6891 transitions. Word has length 26 [2021-06-05 16:33:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:05,727 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 6891 transitions. [2021-06-05 16:33:05,727 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) [2021-06-05 16:33:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 6891 transitions. [2021-06-05 16:33:05,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:05,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:05,730 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:05,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2507,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:05,930 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:05,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:05,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1556883255, now seen corresponding path program 30 times [2021-06-05 16:33:05,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:05,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724314089] [2021-06-05 16:33:05,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:06,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:06,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724314089] [2021-06-05 16:33:06,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724314089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:06,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699246049] [2021-06-05 16:33:06,087 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 [2021-06-05 16:33:06,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:33:06,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:06,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:33:06,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:06,462 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:06,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 28 [2021-06-05 16:33:06,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,475 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:06,475 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:06,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,485 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:06,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:33:06,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,507 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:06,507 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 30 treesize of output 28 [2021-06-05 16:33:06,508 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:06,526 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:33:06,531 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,549 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:33:06,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:33:06,551 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,561 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:06,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:33:06,562 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:06,578 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 16 treesize of output 26 [2021-06-05 16:33:06,582 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,592 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:06,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:33:06,593 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,603 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:06,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:06,604 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,622 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:33:06,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 24 [2021-06-05 16:33:06,623 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,634 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:06,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 1 [2021-06-05 16:33:06,635 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,654 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:06,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:06,658 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,667 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:06,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:06,668 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,677 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:06,677 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:06,678 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,684 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:06,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:33:06,685 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,848 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-06-05 16:33:06,849 INFO L628 ElimStorePlain]: treesize reduction 33, result has 82.1 percent of original size [2021-06-05 16:33:06,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:33:06,852 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:697, output treesize:177 [2021-06-05 16:33:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:07,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699246049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:07,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:07,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 16:33:07,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468424395] [2021-06-05 16:33:07,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:33:07,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:07,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:33:07,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:33:07,037 INFO L87 Difference]: Start difference. First operand 2009 states and 6891 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) [2021-06-05 16:33:07,936 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-06-05 16:33:08,735 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-06-05 16:33:08,900 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-06-05 16:33:08,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:08,953 INFO L93 Difference]: Finished difference Result 2493 states and 8335 transitions. [2021-06-05 16:33:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:33:08,953 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 [2021-06-05 16:33:08,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:08,957 INFO L225 Difference]: With dead ends: 2493 [2021-06-05 16:33:08,957 INFO L226 Difference]: Without dead ends: 2478 [2021-06-05 16:33:08,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1813.9ms TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:33:08,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-06-05 16:33:08,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2002. [2021-06-05 16:33:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 3.4302848575712144) internal successors, (6864), 2001 states have internal predecessors, (6864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 6864 transitions. [2021-06-05 16:33:08,985 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 6864 transitions. Word has length 26 [2021-06-05 16:33:08,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:08,985 INFO L482 AbstractCegarLoop]: Abstraction has 2002 states and 6864 transitions. [2021-06-05 16:33:08,985 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) [2021-06-05 16:33:08,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 6864 transitions. [2021-06-05 16:33:08,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:08,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:08,989 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:09,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2534 [2021-06-05 16:33:09,205 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:09,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:09,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1386281111, now seen corresponding path program 31 times [2021-06-05 16:33:09,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:09,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295779220] [2021-06-05 16:33:09,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:09,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:09,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295779220] [2021-06-05 16:33:09,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295779220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:09,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146689681] [2021-06-05 16:33:09,454 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 [2021-06-05 16:33:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:09,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:33:09,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:09,748 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 16:33:09,957 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-06-05 16:33:10,018 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_249], 2=[A, v_prenex_250]} [2021-06-05 16:33:10,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,023 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 [2021-06-05 16:33:10,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,127 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-05 16:33:10,128 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-06-05 16:33:10,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,132 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 23 treesize of output 13 [2021-06-05 16:33:10,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:10,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,190 INFO L628 ElimStorePlain]: treesize reduction 13, result has 83.5 percent of original size [2021-06-05 16:33:10,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:10,195 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:10,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:33:10,218 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:32 [2021-06-05 16:33:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:10,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146689681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:10,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:10,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:33:10,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879140248] [2021-06-05 16:33:10,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:33:10,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:10,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:33:10,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:33:10,258 INFO L87 Difference]: Start difference. First operand 2002 states and 6864 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) [2021-06-05 16:33:11,312 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-05 16:33:11,643 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-06-05 16:33:11,823 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-06-05 16:33:12,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:12,058 INFO L93 Difference]: Finished difference Result 2918 states and 9622 transitions. [2021-06-05 16:33:12,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:33:12,059 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 [2021-06-05 16:33:12,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:12,063 INFO L225 Difference]: With dead ends: 2918 [2021-06-05 16:33:12,063 INFO L226 Difference]: Without dead ends: 2873 [2021-06-05 16:33:12,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1859.9ms TimeCoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:33:12,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2021-06-05 16:33:12,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2019. [2021-06-05 16:33:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 2018 states have (on average 3.4345887016848367) internal successors, (6931), 2018 states have internal predecessors, (6931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:12,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 6931 transitions. [2021-06-05 16:33:12,089 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 6931 transitions. Word has length 26 [2021-06-05 16:33:12,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:12,089 INFO L482 AbstractCegarLoop]: Abstraction has 2019 states and 6931 transitions. [2021-06-05 16:33:12,089 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) [2021-06-05 16:33:12,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 6931 transitions. [2021-06-05 16:33:12,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:12,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:12,091 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:12,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2591,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:12,291 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:12,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:12,292 INFO L82 PathProgramCache]: Analyzing trace with hash -231251669, now seen corresponding path program 32 times [2021-06-05 16:33:12,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:12,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627391071] [2021-06-05 16:33:12,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:12,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:12,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627391071] [2021-06-05 16:33:12,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627391071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:12,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142952993] [2021-06-05 16:33:12,552 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 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 [2021-06-05 16:33:12,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:33:12,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:12,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:12,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:12,836 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 16:33:12,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:12,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:12,938 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 35 treesize of output 27 [2021-06-05 16:33:12,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:12,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:12,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:12,963 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 35 treesize of output 27 [2021-06-05 16:33:12,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:13,272 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 120 [2021-06-05 16:33:13,273 INFO L628 ElimStorePlain]: treesize reduction 131, result has 71.4 percent of original size [2021-06-05 16:33:13,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:13,286 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:13,286 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 21 treesize of output 17 [2021-06-05 16:33:13,288 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:13,414 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-05 16:33:13,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:13,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:13,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:13,426 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 [2021-06-05 16:33:13,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:13,549 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 16:33:13,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:13,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:13,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:13,561 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 [2021-06-05 16:33:13,565 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:13,674 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 16:33:13,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:13,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:13,686 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:13,686 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 28 treesize of output 20 [2021-06-05 16:33:13,688 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:13,793 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 16:33:13,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:13,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:13,805 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:13,805 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 [2021-06-05 16:33:13,807 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:13,908 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 16:33:13,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:13,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:13,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:13,919 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 [2021-06-05 16:33:13,921 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:14,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:14,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-06-05 16:33:14,034 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,043 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:14,043 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 1 [2021-06-05 16:33:14,044 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:14,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:33:14,126 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:503, output treesize:150 [2021-06-05 16:33:14,259 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-06-05 16:33:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:14,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142952993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:14,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:14,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:33:14,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111497568] [2021-06-05 16:33:14,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:33:14,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:14,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:33:14,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:33:14,300 INFO L87 Difference]: Start difference. First operand 2019 states and 6931 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) [2021-06-05 16:33:15,239 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-05 16:33:15,414 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-06-05 16:33:15,766 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 16:33:16,056 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-06-05 16:33:16,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:16,209 INFO L93 Difference]: Finished difference Result 3134 states and 10334 transitions. [2021-06-05 16:33:16,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:33:16,209 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 [2021-06-05 16:33:16,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:16,213 INFO L225 Difference]: With dead ends: 3134 [2021-06-05 16:33:16,213 INFO L226 Difference]: Without dead ends: 3104 [2021-06-05 16:33:16,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2098.5ms TimeCoverageRelationStatistics Valid=292, Invalid=1040, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:33:16,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-06-05 16:33:16,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 2002. [2021-06-05 16:33:16,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 3.4292853573213393) internal successors, (6862), 2001 states have internal predecessors, (6862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:16,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 6862 transitions. [2021-06-05 16:33:16,240 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 6862 transitions. Word has length 26 [2021-06-05 16:33:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:16,240 INFO L482 AbstractCegarLoop]: Abstraction has 2002 states and 6862 transitions. [2021-06-05 16:33:16,241 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) [2021-06-05 16:33:16,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 6862 transitions. [2021-06-05 16:33:16,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:16,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:16,243 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:16,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2603 [2021-06-05 16:33:16,445 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash -714132561, now seen corresponding path program 33 times [2021-06-05 16:33:16,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:16,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651252100] [2021-06-05 16:33:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:16,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:16,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651252100] [2021-06-05 16:33:16,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651252100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:16,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919459600] [2021-06-05 16:33:16,679 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) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:16,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:33:16,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:16,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:33:16,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:17,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:17,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:33:17,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:17,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:17,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:17,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:17,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:17,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:17,051 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:17,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:17,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:17,057 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:17,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:17,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:17,063 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:17,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:17,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:17,070 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:17,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:17,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:17,075 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:17,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:17,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:17,081 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:17,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:17,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:17,087 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:17,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:17,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:17,094 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:17,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:17,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:17,100 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:17,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:17,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,106 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 [2021-06-05 16:33:17,106 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:17,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:17,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:17,112 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:17,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:17,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:17,118 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:17,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:17,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:17,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:33:17,122 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:17,143 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-06-05 16:33:17,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:33:17,144 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:33:17,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:17,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919459600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:17,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:17,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:33:17,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160440838] [2021-06-05 16:33:17,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:33:17,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:17,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:33:17,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:33:17,167 INFO L87 Difference]: Start difference. First operand 2002 states and 6862 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) [2021-06-05 16:33:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:17,700 INFO L93 Difference]: Finished difference Result 2504 states and 8391 transitions. [2021-06-05 16:33:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:33:17,701 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 [2021-06-05 16:33:17,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:17,704 INFO L225 Difference]: With dead ends: 2504 [2021-06-05 16:33:17,704 INFO L226 Difference]: Without dead ends: 2483 [2021-06-05 16:33:17,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 674.6ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:33:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-06-05 16:33:17,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2009. [2021-06-05 16:33:17,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 3.431772908366534) internal successors, (6891), 2008 states have internal predecessors, (6891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 6891 transitions. [2021-06-05 16:33:17,727 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 6891 transitions. Word has length 26 [2021-06-05 16:33:17,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:17,727 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 6891 transitions. [2021-06-05 16:33:17,727 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) [2021-06-05 16:33:17,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 6891 transitions. [2021-06-05 16:33:17,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:17,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:17,729 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:17,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2631 [2021-06-05 16:33:17,930 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:17,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:17,930 INFO L82 PathProgramCache]: Analyzing trace with hash -881941653, now seen corresponding path program 34 times [2021-06-05 16:33:17,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:17,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309466714] [2021-06-05 16:33:17,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:18,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:18,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309466714] [2021-06-05 16:33:18,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309466714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:18,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120830092] [2021-06-05 16:33:18,151 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 [2021-06-05 16:33:18,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:33:18,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:18,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:33:18,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:18,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:18,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,506 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 30 treesize of output 13 [2021-06-05 16:33:18,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:18,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:18,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,513 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 33 treesize of output 19 [2021-06-05 16:33:18,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:18,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:18,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,519 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 28 treesize of output 16 [2021-06-05 16:33:18,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:18,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:18,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,525 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 26 treesize of output 13 [2021-06-05 16:33:18,527 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:18,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:18,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:18,533 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:18,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:18,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:33:18,540 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:18,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:18,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:18,546 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:18,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:18,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:18,552 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:18,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:18,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,558 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 28 treesize of output 16 [2021-06-05 16:33:18,558 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:18,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:18,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:18,565 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:18,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:18,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:18,571 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:18,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:18,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:18,577 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:18,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:18,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:18,583 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:18,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:18,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,588 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:18,588 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:18,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:18,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:18,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:18,592 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:18,613 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-06-05 16:33:18,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:33:18,614 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:33:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:18,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120830092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:18,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:18,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:33:18,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671144409] [2021-06-05 16:33:18,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:33:18,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:18,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:33:18,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:33:18,642 INFO L87 Difference]: Start difference. First operand 2009 states and 6891 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) [2021-06-05 16:33:19,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:19,015 INFO L93 Difference]: Finished difference Result 2352 states and 7913 transitions. [2021-06-05 16:33:19,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:33:19,015 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 [2021-06-05 16:33:19,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:19,018 INFO L225 Difference]: With dead ends: 2352 [2021-06-05 16:33:19,018 INFO L226 Difference]: Without dead ends: 2333 [2021-06-05 16:33:19,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 532.3ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:19,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-05 16:33:19,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 2003. [2021-06-05 16:33:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.4315684315684316) internal successors, (6870), 2002 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6870 transitions. [2021-06-05 16:33:19,045 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6870 transitions. Word has length 26 [2021-06-05 16:33:19,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:19,045 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 6870 transitions. [2021-06-05 16:33:19,045 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) [2021-06-05 16:33:19,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6870 transitions. [2021-06-05 16:33:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:19,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:19,049 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:19,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2673 [2021-06-05 16:33:19,265 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:19,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1345509615, now seen corresponding path program 35 times [2021-06-05 16:33:19,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:19,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661528796] [2021-06-05 16:33:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:19,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:19,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661528796] [2021-06-05 16:33:19,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661528796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:19,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416811753] [2021-06-05 16:33:19,469 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 [2021-06-05 16:33:19,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:33:19,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:19,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:33:19,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:19,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,820 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:19,820 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 [2021-06-05 16:33:19,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,833 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:19,833 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 20 [2021-06-05 16:33:19,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,843 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:19,843 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 [2021-06-05 16:33:19,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,853 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:19,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:19,854 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:19,866 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 30 treesize of output 24 [2021-06-05 16:33:19,867 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,877 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:19,877 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 [2021-06-05 16:33:19,877 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,890 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:19,890 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 [2021-06-05 16:33:19,891 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,901 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:19,902 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 [2021-06-05 16:33:19,902 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:19,914 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 30 treesize of output 24 [2021-06-05 16:33:19,918 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:19,929 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 [2021-06-05 16:33:19,932 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,941 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:19,941 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 28 treesize of output 16 [2021-06-05 16:33:19,942 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,951 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:19,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:19,952 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,964 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:19,964 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 [2021-06-05 16:33:19,965 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,975 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:19,975 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 [2021-06-05 16:33:19,975 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,987 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:19,988 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 20 [2021-06-05 16:33:19,989 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,995 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:19,995 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 1 [2021-06-05 16:33:19,996 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:20,101 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-06-05 16:33:20,101 INFO L628 ElimStorePlain]: treesize reduction 24, result has 82.5 percent of original size [2021-06-05 16:33:20,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:33:20,103 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:91 [2021-06-05 16:33:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:20,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416811753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:20,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:20,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:33:20,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578386291] [2021-06-05 16:33:20,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:33:20,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:20,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:33:20,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:33:20,195 INFO L87 Difference]: Start difference. First operand 2003 states and 6870 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) [2021-06-05 16:33:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:21,580 INFO L93 Difference]: Finished difference Result 2949 states and 9724 transitions. [2021-06-05 16:33:21,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:33:21,580 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 [2021-06-05 16:33:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:21,584 INFO L225 Difference]: With dead ends: 2949 [2021-06-05 16:33:21,585 INFO L226 Difference]: Without dead ends: 2899 [2021-06-05 16:33:21,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1346.0ms TimeCoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:33:21,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-06-05 16:33:21,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 1994. [2021-06-05 16:33:21,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 3.4290015052684395) internal successors, (6834), 1993 states have internal predecessors, (6834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:21,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 6834 transitions. [2021-06-05 16:33:21,612 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 6834 transitions. Word has length 26 [2021-06-05 16:33:21,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:21,612 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 6834 transitions. [2021-06-05 16:33:21,612 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) [2021-06-05 16:33:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 6834 transitions. [2021-06-05 16:33:21,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:21,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:21,614 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:21,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2717,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:21,822 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:21,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:21,822 INFO L82 PathProgramCache]: Analyzing trace with hash -583168205, now seen corresponding path program 36 times [2021-06-05 16:33:21,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:21,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483995730] [2021-06-05 16:33:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:21,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:21,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483995730] [2021-06-05 16:33:21,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483995730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:21,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766646708] [2021-06-05 16:33:21,989 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 [2021-06-05 16:33:22,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:33:22,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:22,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:22,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:22,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:22,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:22,338 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 24 [2021-06-05 16:33:22,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:22,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:22,350 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:22,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-06-05 16:33:22,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:22,467 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 16:33:22,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:22,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:22,481 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:22,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:22,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:22,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:22,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:22,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:22,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:22,602 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-05 16:33:22,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:22,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:22,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:22,615 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 26 treesize of output 24 [2021-06-05 16:33:22,616 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:22,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:22,625 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:22,626 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 21 treesize of output 17 [2021-06-05 16:33:22,627 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:22,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:22,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:22,740 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:22,740 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 20 [2021-06-05 16:33:22,741 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:22,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:22,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:22,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-06-05 16:33:22,753 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:22,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:22,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:33:22,841 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:293, output treesize:141 [2021-06-05 16:33:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:22,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766646708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:22,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:22,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:33:22,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861907119] [2021-06-05 16:33:22,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:22,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:22,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:22,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:22,973 INFO L87 Difference]: Start difference. First operand 1994 states and 6834 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) [2021-06-05 16:33:23,595 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 16:33:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:23,822 INFO L93 Difference]: Finished difference Result 2201 states and 7427 transitions. [2021-06-05 16:33:23,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:33:23,823 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 [2021-06-05 16:33:23,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:23,825 INFO L225 Difference]: With dead ends: 2201 [2021-06-05 16:33:23,825 INFO L226 Difference]: Without dead ends: 2176 [2021-06-05 16:33:23,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 940.5ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:33:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-05 16:33:23,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1990. [2021-06-05 16:33:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 3.431875314228255) internal successors, (6826), 1989 states have internal predecessors, (6826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 6826 transitions. [2021-06-05 16:33:23,847 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 6826 transitions. Word has length 26 [2021-06-05 16:33:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:23,847 INFO L482 AbstractCegarLoop]: Abstraction has 1990 states and 6826 transitions. [2021-06-05 16:33:23,847 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) [2021-06-05 16:33:23,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 6826 transitions. [2021-06-05 16:33:23,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:23,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:23,849 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:24,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2766 [2021-06-05 16:33:24,050 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:24,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:24,050 INFO L82 PathProgramCache]: Analyzing trace with hash -129711505, now seen corresponding path program 37 times [2021-06-05 16:33:24,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:24,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136077702] [2021-06-05 16:33:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:24,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:24,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136077702] [2021-06-05 16:33:24,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136077702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:24,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449829070] [2021-06-05 16:33:24,273 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 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 [2021-06-05 16:33:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:24,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:24,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:24,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:24,720 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:24,720 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 [2021-06-05 16:33:24,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:24,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:24,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:24,733 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 [2021-06-05 16:33:24,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:25,070 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-06-05 16:33:25,071 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.7 percent of original size [2021-06-05 16:33:25,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:25,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:25,086 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 [2021-06-05 16:33:25,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:25,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:25,098 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:25,098 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 [2021-06-05 16:33:25,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:25,249 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:33:25,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:25,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:25,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:25,263 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 30 treesize of output 24 [2021-06-05 16:33:25,267 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:25,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:25,278 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:25,278 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 20 [2021-06-05 16:33:25,279 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:25,411 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 16:33:25,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:25,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:25,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:25,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-06-05 16:33:25,426 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:25,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:25,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:25,436 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 24 [2021-06-05 16:33:25,438 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:25,681 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-06-05 16:33:25,682 INFO L628 ElimStorePlain]: treesize reduction 4, result has 98.5 percent of original size [2021-06-05 16:33:25,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:25,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:25,694 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 [2021-06-05 16:33:25,698 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:25,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:25,707 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:25,707 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 [2021-06-05 16:33:25,709 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:25,813 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-05 16:33:25,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:25,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:33:25,819 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:407, output treesize:170 [2021-06-05 16:33:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:25,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449829070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:25,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:25,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:33:25,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146714989] [2021-06-05 16:33:25,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:25,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:25,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:25,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:25,956 INFO L87 Difference]: Start difference. First operand 1990 states and 6826 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) [2021-06-05 16:33:26,673 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-06-05 16:33:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:26,872 INFO L93 Difference]: Finished difference Result 2694 states and 8981 transitions. [2021-06-05 16:33:26,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:33:26,872 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 [2021-06-05 16:33:26,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:26,876 INFO L225 Difference]: With dead ends: 2694 [2021-06-05 16:33:26,876 INFO L226 Difference]: Without dead ends: 2648 [2021-06-05 16:33:26,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1070.1ms TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:33:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-06-05 16:33:26,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1999. [2021-06-05 16:33:26,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 3.4334334334334335) internal successors, (6860), 1998 states have internal predecessors, (6860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:26,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 6860 transitions. [2021-06-05 16:33:26,901 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 6860 transitions. Word has length 26 [2021-06-05 16:33:26,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:26,901 INFO L482 AbstractCegarLoop]: Abstraction has 1999 states and 6860 transitions. [2021-06-05 16:33:26,901 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) [2021-06-05 16:33:26,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 6860 transitions. [2021-06-05 16:33:26,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:26,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:26,904 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:27,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2797 [2021-06-05 16:33:27,104 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:27,104 INFO L82 PathProgramCache]: Analyzing trace with hash -858801881, now seen corresponding path program 38 times [2021-06-05 16:33:27,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:27,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29475859] [2021-06-05 16:33:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:27,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:27,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29475859] [2021-06-05 16:33:27,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29475859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:27,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117043265] [2021-06-05 16:33:27,351 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 [2021-06-05 16:33:27,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:33:27,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:27,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:33:27,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:27,761 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 16:33:28,077 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2021-06-05 16:33:28,143 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_290, v_prenex_289]} [2021-06-05 16:33:28,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,146 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 [2021-06-05 16:33:28,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,241 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-06-05 16:33:28,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:33:28,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,250 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 30 treesize of output 16 [2021-06-05 16:33:28,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,304 INFO L628 ElimStorePlain]: treesize reduction 13, result has 83.5 percent of original size [2021-06-05 16:33:28,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,307 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 23 treesize of output 13 [2021-06-05 16:33:28,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:28,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:33:28,331 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:32 [2021-06-05 16:33:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:28,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117043265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:28,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:28,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:33:28,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789315996] [2021-06-05 16:33:28,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:28,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:28,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:28,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:28,371 INFO L87 Difference]: Start difference. First operand 1999 states and 6860 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) [2021-06-05 16:33:29,245 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:33:29,638 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 86 [2021-06-05 16:33:29,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:29,839 INFO L93 Difference]: Finished difference Result 2703 states and 8943 transitions. [2021-06-05 16:33:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:33:29,839 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 [2021-06-05 16:33:29,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:29,842 INFO L225 Difference]: With dead ends: 2703 [2021-06-05 16:33:29,842 INFO L226 Difference]: Without dead ends: 2658 [2021-06-05 16:33:29,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1812.4ms TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:33:29,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2021-06-05 16:33:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 1983. [2021-06-05 16:33:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 3.43087790110999) internal successors, (6800), 1982 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:29,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 6800 transitions. [2021-06-05 16:33:29,866 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 6800 transitions. Word has length 26 [2021-06-05 16:33:29,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:29,866 INFO L482 AbstractCegarLoop]: Abstraction has 1983 states and 6800 transitions. [2021-06-05 16:33:29,866 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) [2021-06-05 16:33:29,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 6800 transitions. [2021-06-05 16:33:29,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:29,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:29,868 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:30,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2834,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:30,069 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:30,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:30,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1072305685, now seen corresponding path program 39 times [2021-06-05 16:33:30,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:30,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129536584] [2021-06-05 16:33:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:30,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:30,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129536584] [2021-06-05 16:33:30,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129536584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:30,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505485301] [2021-06-05 16:33:30,204 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 [2021-06-05 16:33:30,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:33:30,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:30,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:30,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:30,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:30,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:33:30,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:30,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:30,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:30,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:30,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:30,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,590 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:30,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:30,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:30,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:30,596 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:30,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:30,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:30,604 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:30,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:30,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:33:30,610 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:30,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:30,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,616 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 28 treesize of output 16 [2021-06-05 16:33:30,617 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:30,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:30,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:30,623 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:30,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:30,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:30,629 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:30,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:30,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,635 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 28 treesize of output 16 [2021-06-05 16:33:30,635 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:30,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:30,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:30,642 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:30,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:30,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:30,648 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:30,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:30,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:30,654 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:30,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:30,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:30,660 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:30,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:30,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:30,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:30,663 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:30,684 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-06-05 16:33:30,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:33:30,685 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:33:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:30,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505485301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:30,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:30,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:33:30,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468174309] [2021-06-05 16:33:30,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:30,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:30,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:30,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:30,709 INFO L87 Difference]: Start difference. First operand 1983 states and 6800 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) [2021-06-05 16:33:31,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:31,233 INFO L93 Difference]: Finished difference Result 2475 states and 8338 transitions. [2021-06-05 16:33:31,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:33:31,233 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 [2021-06-05 16:33:31,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:31,237 INFO L225 Difference]: With dead ends: 2475 [2021-06-05 16:33:31,237 INFO L226 Difference]: Without dead ends: 2460 [2021-06-05 16:33:31,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 566.4ms TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:33:31,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-06-05 16:33:31,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 1983. [2021-06-05 16:33:31,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 3.43087790110999) internal successors, (6800), 1982 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 6800 transitions. [2021-06-05 16:33:31,278 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 6800 transitions. Word has length 26 [2021-06-05 16:33:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:31,278 INFO L482 AbstractCegarLoop]: Abstraction has 1983 states and 6800 transitions. [2021-06-05 16:33:31,279 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) [2021-06-05 16:33:31,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 6800 transitions. [2021-06-05 16:33:31,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:31,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:31,281 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:31,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2845 [2021-06-05 16:33:31,481 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:31,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:31,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1240114777, now seen corresponding path program 40 times [2021-06-05 16:33:31,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:31,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144913122] [2021-06-05 16:33:31,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:31,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:31,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144913122] [2021-06-05 16:33:31,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144913122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:31,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806066057] [2021-06-05 16:33:31,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:33:31,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:33:31,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:31,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:33:31,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:31,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:31,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:31,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:31,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:31,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:31,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:31,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:31,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:31,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:31,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:31,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:31,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:31,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:31,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:31,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:31,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:31,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:31,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:31,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:33:31,986 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:31,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:31,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:31,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:31,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:31,992 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:31,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:31,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:31,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:31,996 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:31,997 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:32,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:32,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:32,003 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:32,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:32,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:32,008 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:32,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:32,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:32,014 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:32,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:32,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:32,019 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:32,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:32,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:32,024 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:32,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:32,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:33:32,030 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:32,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:32,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:32,034 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:32,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:32,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:32,039 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:32,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:32,043 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,062 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:33:32,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:33:32,064 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:33:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:32,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806066057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:32,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:32,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:33:32,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384556815] [2021-06-05 16:33:32,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:32,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:32,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:32,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:32,095 INFO L87 Difference]: Start difference. First operand 1983 states and 6800 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) [2021-06-05 16:33:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:33,132 INFO L93 Difference]: Finished difference Result 2790 states and 9280 transitions. [2021-06-05 16:33:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:33:33,132 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 [2021-06-05 16:33:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:33,136 INFO L225 Difference]: With dead ends: 2790 [2021-06-05 16:33:33,136 INFO L226 Difference]: Without dead ends: 2760 [2021-06-05 16:33:33,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1018.6ms TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:33:33,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-06-05 16:33:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 1983. [2021-06-05 16:33:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 3.43087790110999) internal successors, (6800), 1982 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 6800 transitions. [2021-06-05 16:33:33,173 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 6800 transitions. Word has length 26 [2021-06-05 16:33:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:33,173 INFO L482 AbstractCegarLoop]: Abstraction has 1983 states and 6800 transitions. [2021-06-05 16:33:33,173 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) [2021-06-05 16:33:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 6800 transitions. [2021-06-05 16:33:33,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:33,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:33,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:33,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2887,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:33,376 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:33,376 INFO L82 PathProgramCache]: Analyzing trace with hash -941341329, now seen corresponding path program 41 times [2021-06-05 16:33:33,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:33,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927161428] [2021-06-05 16:33:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:33,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:33,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927161428] [2021-06-05 16:33:33,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927161428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:33,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891813116] [2021-06-05 16:33:33,568 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 [2021-06-05 16:33:33,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:33:33,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:33,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:33:33,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:33,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:33,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:33,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:33,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:33,972 INFO L628 ElimStorePlain]: treesize reduction 121, result has 44.0 percent of original size [2021-06-05 16:33:33,975 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 23 treesize of output 13 [2021-06-05 16:33:33,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:34,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:34,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:34,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:34,005 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 21 treesize of output 13 [2021-06-05 16:33:34,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:34,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:34,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:34,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:34,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:34,035 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:34,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:34,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:33:34,057 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:248, output treesize:22 [2021-06-05 16:33:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:34,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891813116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:34,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:34,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:33:34,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930405903] [2021-06-05 16:33:34,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:34,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:34,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:34,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:34,095 INFO L87 Difference]: Start difference. First operand 1983 states and 6800 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) [2021-06-05 16:33:34,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:34,763 INFO L93 Difference]: Finished difference Result 2608 states and 8716 transitions. [2021-06-05 16:33:34,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:33:34,763 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 [2021-06-05 16:33:34,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:34,767 INFO L225 Difference]: With dead ends: 2608 [2021-06-05 16:33:34,767 INFO L226 Difference]: Without dead ends: 2578 [2021-06-05 16:33:34,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 688.7ms TimeCoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:33:34,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-06-05 16:33:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1986. [2021-06-05 16:33:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 3.433249370277078) internal successors, (6815), 1985 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:34,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 6815 transitions. [2021-06-05 16:33:34,790 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 6815 transitions. Word has length 26 [2021-06-05 16:33:34,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:34,790 INFO L482 AbstractCegarLoop]: Abstraction has 1986 states and 6815 transitions. [2021-06-05 16:33:34,790 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) [2021-06-05 16:33:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 6815 transitions. [2021-06-05 16:33:34,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:34,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:34,792 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:34,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2931,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:34,994 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:34,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:34,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1403214703, now seen corresponding path program 42 times [2021-06-05 16:33:34,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:34,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705431622] [2021-06-05 16:33:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:35,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:35,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705431622] [2021-06-05 16:33:35,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705431622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:35,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150387441] [2021-06-05 16:33:35,135 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 [2021-06-05 16:33:35,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:33:35,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:35,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:33:35,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:35,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:35,542 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:35,542 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 30 treesize of output 20 [2021-06-05 16:33:35,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:35,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:35,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:35,554 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 30 treesize of output 24 [2021-06-05 16:33:35,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:35,668 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 16:33:35,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:35,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:35,681 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:35,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:35,683 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:35,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:35,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:35,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:35,696 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:35,799 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 16:33:35,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:35,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:35,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:35,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-06-05 16:33:35,812 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:35,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:35,822 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:35,822 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 20 [2021-06-05 16:33:35,823 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:35,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:35,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:35,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:35,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:35,929 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:35,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:35,938 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:35,938 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 [2021-06-05 16:33:35,939 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:36,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:33:36,028 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:309, output treesize:141 [2021-06-05 16:33:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:36,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150387441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:36,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:36,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:33:36,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009443112] [2021-06-05 16:33:36,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:36,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:36,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:36,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:36,163 INFO L87 Difference]: Start difference. First operand 1986 states and 6815 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) [2021-06-05 16:33:36,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:36,667 INFO L93 Difference]: Finished difference Result 2559 states and 8622 transitions. [2021-06-05 16:33:36,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:33:36,667 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 [2021-06-05 16:33:36,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:36,671 INFO L225 Difference]: With dead ends: 2559 [2021-06-05 16:33:36,671 INFO L226 Difference]: Without dead ends: 2544 [2021-06-05 16:33:36,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 713.0ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:33:36,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-06-05 16:33:36,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2010. [2021-06-05 16:33:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 3.4310602289696366) internal successors, (6893), 2009 states have internal predecessors, (6893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:36,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 6893 transitions. [2021-06-05 16:33:36,695 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 6893 transitions. Word has length 26 [2021-06-05 16:33:36,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:36,695 INFO L482 AbstractCegarLoop]: Abstraction has 2010 states and 6893 transitions. [2021-06-05 16:33:36,695 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) [2021-06-05 16:33:36,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 6893 transitions. [2021-06-05 16:33:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:36,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:36,698 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:36,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2945 [2021-06-05 16:33:36,898 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:36,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2092411309, now seen corresponding path program 43 times [2021-06-05 16:33:36,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:36,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093716388] [2021-06-05 16:33:36,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:37,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:37,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093716388] [2021-06-05 16:33:37,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093716388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:37,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64413674] [2021-06-05 16:33:37,119 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 [2021-06-05 16:33:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:37,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:37,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:37,522 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 16:33:37,737 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-06-05 16:33:37,794 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_313, v_prenex_314], 2=[A, v_prenex_312]} [2021-06-05 16:33:37,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:37,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 16:33:37,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:37,929 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-05 16:33:37,930 INFO L628 ElimStorePlain]: treesize reduction 117, result has 43.8 percent of original size [2021-06-05 16:33:37,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:37,933 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 [2021-06-05 16:33:37,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:37,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:37,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:37,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:37,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:37,966 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:37,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:37,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:37,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:37,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:37,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:38,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:38,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:33:38,017 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:222, output treesize:15 [2021-06-05 16:33:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:38,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64413674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:38,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:38,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:33:38,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857153748] [2021-06-05 16:33:38,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:33:38,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:38,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:33:38,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:33:38,064 INFO L87 Difference]: Start difference. First operand 2010 states and 6893 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) [2021-06-05 16:33:38,712 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 16:33:38,905 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2021-06-05 16:33:39,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:39,042 INFO L93 Difference]: Finished difference Result 2656 states and 8840 transitions. [2021-06-05 16:33:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:33:39,042 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 [2021-06-05 16:33:39,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:39,046 INFO L225 Difference]: With dead ends: 2656 [2021-06-05 16:33:39,046 INFO L226 Difference]: Without dead ends: 2611 [2021-06-05 16:33:39,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1378.9ms TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:33:39,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2021-06-05 16:33:39,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 2044. [2021-06-05 16:33:39,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 2043 states have (on average 3.4322075379344104) internal successors, (7012), 2043 states have internal predecessors, (7012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:39,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 7012 transitions. [2021-06-05 16:33:39,082 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 7012 transitions. Word has length 26 [2021-06-05 16:33:39,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:39,082 INFO L482 AbstractCegarLoop]: Abstraction has 2044 states and 7012 transitions. [2021-06-05 16:33:39,082 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) [2021-06-05 16:33:39,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 7012 transitions. [2021-06-05 16:33:39,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:39,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:39,085 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:39,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2977,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:39,285 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:39,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:39,286 INFO L82 PathProgramCache]: Analyzing trace with hash 585023207, now seen corresponding path program 44 times [2021-06-05 16:33:39,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:39,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063711492] [2021-06-05 16:33:39,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:39,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:39,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063711492] [2021-06-05 16:33:39,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063711492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:39,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482815697] [2021-06-05 16:33:39,520 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 [2021-06-05 16:33:39,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:33:39,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:39,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:33:39,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:39,916 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 16:33:40,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:40,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:40,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:40,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:40,459 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 150 [2021-06-05 16:33:40,460 INFO L628 ElimStorePlain]: treesize reduction 139, result has 74.8 percent of original size [2021-06-05 16:33:40,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:40,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:40,486 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:33:40,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:40,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:40,504 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:40,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:40,505 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:40,807 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 142 [2021-06-05 16:33:40,808 INFO L628 ElimStorePlain]: treesize reduction 32, result has 91.6 percent of original size [2021-06-05 16:33:40,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:40,830 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:33:40,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:33:40,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:40,977 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 16:33:40,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:40,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:41,002 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:41,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:33:41,003 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:41,163 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-05 16:33:41,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:41,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:41,191 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:41,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 28 [2021-06-05 16:33:41,192 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:41,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:41,205 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:41,206 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 30 treesize of output 1 [2021-06-05 16:33:41,206 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:41,320 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 16:33:41,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:41,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:41,343 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:41,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:33:41,347 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:41,455 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 16:33:41,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:41,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:41,476 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:33:41,476 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 28 treesize of output 24 [2021-06-05 16:33:41,477 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:41,581 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 16:33:41,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:41,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:41,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:41,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:41,605 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:41,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:41,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:33:41,720 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:563, output treesize:232 [2021-06-05 16:33:41,896 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-06-05 16:33:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:41,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482815697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:41,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:41,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:33:41,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230691802] [2021-06-05 16:33:41,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:33:41,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:41,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:33:41,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:33:41,930 INFO L87 Difference]: Start difference. First operand 2044 states and 7012 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) [2021-06-05 16:33:42,209 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 16:33:42,633 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-06-05 16:33:42,901 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:33:43,071 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 16:33:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:43,331 INFO L93 Difference]: Finished difference Result 2980 states and 9896 transitions. [2021-06-05 16:33:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:33:43,331 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 [2021-06-05 16:33:43,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:43,335 INFO L225 Difference]: With dead ends: 2980 [2021-06-05 16:33:43,335 INFO L226 Difference]: Without dead ends: 2950 [2021-06-05 16:33:43,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1719.5ms TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:33:43,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2021-06-05 16:33:43,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 2027. [2021-06-05 16:33:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 3.428923988153998) internal successors, (6947), 2026 states have internal predecessors, (6947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:43,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 6947 transitions. [2021-06-05 16:33:43,362 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 6947 transitions. Word has length 26 [2021-06-05 16:33:43,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:43,363 INFO L482 AbstractCegarLoop]: Abstraction has 2027 states and 6947 transitions. [2021-06-05 16:33:43,363 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) [2021-06-05 16:33:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 6947 transitions. [2021-06-05 16:33:43,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:43,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:43,365 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:43,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2991,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:43,566 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:43,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:43,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1104919697, now seen corresponding path program 45 times [2021-06-05 16:33:43,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:43,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727293119] [2021-06-05 16:33:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:43,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:43,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727293119] [2021-06-05 16:33:43,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727293119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:43,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496103743] [2021-06-05 16:33:43,825 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 [2021-06-05 16:33:43,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:33:43,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:43,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:33:43,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:44,220 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-05 16:33:44,334 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_343, v_prenex_344, v_prenex_345], 3=[v_prenex_347]} [2021-06-05 16:33:44,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:44,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:33:44,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:44,363 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 35 treesize of output 27 [2021-06-05 16:33:44,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,691 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2021-06-05 16:33:44,691 INFO L628 ElimStorePlain]: treesize reduction 21, result has 94.6 percent of original size [2021-06-05 16:33:44,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:44,706 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 [2021-06-05 16:33:44,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,722 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:44,722 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 [2021-06-05 16:33:44,723 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,866 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 16:33:44,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:44,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,881 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:44,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:44,883 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:44,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:44,895 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:45,028 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 16:33:45,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:45,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:45,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:45,041 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 24 [2021-06-05 16:33:45,045 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:45,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:45,055 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:45,056 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 30 treesize of output 20 [2021-06-05 16:33:45,056 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:45,194 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 16:33:45,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:45,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:45,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:45,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:45,206 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 18 treesize of output 20 [2021-06-05 16:33:45,209 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:45,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:45,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:45,219 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 16:33:45,219 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 [2021-06-05 16:33:45,220 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:45,325 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 16:33:45,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:45,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:33:45,331 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:425, output treesize:180 [2021-06-05 16:33:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:45,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496103743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:45,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:45,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:33:45,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414090857] [2021-06-05 16:33:45,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:33:45,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:45,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:33:45,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:33:45,472 INFO L87 Difference]: Start difference. First operand 2027 states and 6947 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) [2021-06-05 16:33:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:46,081 INFO L93 Difference]: Finished difference Result 2615 states and 8782 transitions. [2021-06-05 16:33:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:33:46,082 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 [2021-06-05 16:33:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:46,085 INFO L225 Difference]: With dead ends: 2615 [2021-06-05 16:33:46,085 INFO L226 Difference]: Without dead ends: 2590 [2021-06-05 16:33:46,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1028.5ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:33:46,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-06-05 16:33:46,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2027. [2021-06-05 16:33:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 3.430898321816387) internal successors, (6951), 2026 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 6951 transitions. [2021-06-05 16:33:46,109 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 6951 transitions. Word has length 26 [2021-06-05 16:33:46,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:46,110 INFO L482 AbstractCegarLoop]: Abstraction has 2027 states and 6951 transitions. [2021-06-05 16:33:46,110 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) [2021-06-05 16:33:46,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 6951 transitions. [2021-06-05 16:33:46,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:46,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:46,112 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:46,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3034 [2021-06-05 16:33:46,312 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:46,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:46,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1379621035, now seen corresponding path program 46 times [2021-06-05 16:33:46,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:46,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977368270] [2021-06-05 16:33:46,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:46,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:46,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977368270] [2021-06-05 16:33:46,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977368270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:46,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949739155] [2021-06-05 16:33:46,552 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 [2021-06-05 16:33:46,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:33:46,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:46,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:33:46,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:46,873 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-05 16:33:47,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:47,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:47,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 16:33:47,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:47,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:47,205 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:33:47,206 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 28 treesize of output 24 [2021-06-05 16:33:47,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:47,578 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2021-06-05 16:33:47,578 INFO L628 ElimStorePlain]: treesize reduction 33, result has 92.4 percent of original size [2021-06-05 16:33:47,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:47,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:47,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:33:47,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:47,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:47,623 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:33:47,623 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 30 treesize of output 24 [2021-06-05 16:33:47,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:47,951 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-06-05 16:33:47,952 INFO L628 ElimStorePlain]: treesize reduction 14, result has 96.3 percent of original size [2021-06-05 16:33:47,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:47,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:47,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:33:47,974 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:47,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:47,992 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:33:47,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 treesize of output 24 [2021-06-05 16:33:47,993 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:48,299 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-06-05 16:33:48,300 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-06-05 16:33:48,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:48,322 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:48,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:33:48,325 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:48,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:48,347 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:48,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:33:48,349 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:48,495 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 16:33:48,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:48,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:48,515 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:33:48,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:33:48,517 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:48,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:48,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:48,531 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 16:33:48,536 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:48,666 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 16:33:48,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:48,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:33:48,684 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 11 variables, input treesize:457, output treesize:247 [2021-06-05 16:33:48,830 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-06-05 16:33:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:48,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949739155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:48,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:48,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:33:48,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686351432] [2021-06-05 16:33:48,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:33:48,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:48,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:33:48,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:33:48,867 INFO L87 Difference]: Start difference. First operand 2027 states and 6951 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) [2021-06-05 16:33:49,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:49,517 INFO L93 Difference]: Finished difference Result 2605 states and 8786 transitions. [2021-06-05 16:33:49,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:33:49,517 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 [2021-06-05 16:33:49,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:49,521 INFO L225 Difference]: With dead ends: 2605 [2021-06-05 16:33:49,521 INFO L226 Difference]: Without dead ends: 2590 [2021-06-05 16:33:49,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 986.8ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:33:49,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-06-05 16:33:49,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2027. [2021-06-05 16:33:49,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 3.430898321816387) internal successors, (6951), 2026 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:49,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 6951 transitions. [2021-06-05 16:33:49,545 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 6951 transitions. Word has length 26 [2021-06-05 16:33:49,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:49,545 INFO L482 AbstractCegarLoop]: Abstraction has 2027 states and 6951 transitions. [2021-06-05 16:33:49,545 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) [2021-06-05 16:33:49,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 6951 transitions. [2021-06-05 16:33:49,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:49,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:49,548 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:49,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3071,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:49,750 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:49,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:49,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1044929515, now seen corresponding path program 55 times [2021-06-05 16:33:49,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:49,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125235825] [2021-06-05 16:33:49,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:49,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:49,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125235825] [2021-06-05 16:33:49,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125235825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:49,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811605091] [2021-06-05 16:33:49,922 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 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 [2021-06-05 16:33:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:49,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:33:49,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:50,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,371 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 [2021-06-05 16:33:50,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,381 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 [2021-06-05 16:33:50,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,392 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 [2021-06-05 16:33:50,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,402 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 [2021-06-05 16:33:50,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:50,414 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,424 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 [2021-06-05 16:33:50,425 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:50,435 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,444 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 [2021-06-05 16:33:50,445 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:50,455 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,464 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 [2021-06-05 16:33:50,464 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:50,474 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,481 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 [2021-06-05 16:33:50,482 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,489 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 [2021-06-05 16:33:50,490 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,496 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 [2021-06-05 16:33:50,497 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:50,500 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 [2021-06-05 16:33:50,501 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,520 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:33:50,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:33:50,522 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:33:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:50,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811605091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:50,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:50,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:33:50,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381527757] [2021-06-05 16:33:50,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:33:50,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:50,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:33:50,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:33:50,545 INFO L87 Difference]: Start difference. First operand 2027 states and 6951 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) [2021-06-05 16:33:51,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:51,129 INFO L93 Difference]: Finished difference Result 2632 states and 8515 transitions. [2021-06-05 16:33:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:33:51,129 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 [2021-06-05 16:33:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:51,133 INFO L225 Difference]: With dead ends: 2632 [2021-06-05 16:33:51,133 INFO L226 Difference]: Without dead ends: 2595 [2021-06-05 16:33:51,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 607.2ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:33:51,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2021-06-05 16:33:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2051. [2021-06-05 16:33:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.430731707317073) internal successors, (7033), 2050 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:51,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 7033 transitions. [2021-06-05 16:33:51,158 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 7033 transitions. Word has length 26 [2021-06-05 16:33:51,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:51,158 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 7033 transitions. [2021-06-05 16:33:51,158 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) [2021-06-05 16:33:51,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 7033 transitions. [2021-06-05 16:33:51,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:51,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:51,161 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:51,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3146,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:51,362 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:51,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:51,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2112804079, now seen corresponding path program 56 times [2021-06-05 16:33:51,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:51,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041396766] [2021-06-05 16:33:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:51,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:51,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041396766] [2021-06-05 16:33:51,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041396766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:51,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26391753] [2021-06-05 16:33:51,523 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 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 [2021-06-05 16:33:51,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:33:51,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:51,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:33:51,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:51,800 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_357], 5=[v_prenex_361, v_prenex_359]} [2021-06-05 16:33:51,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:51,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:51,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:51,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:51,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:51,892 INFO L628 ElimStorePlain]: treesize reduction 133, result has 44.1 percent of original size [2021-06-05 16:33:51,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:51,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:51,896 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 23 treesize of output 13 [2021-06-05 16:33:51,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:51,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:51,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:51,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:51,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:51,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 16:33:51,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:51,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:51,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:51,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:51,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:51,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:33:51,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:51,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:51,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:33:51,980 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:22 [2021-06-05 16:33:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:52,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26391753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:52,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:52,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:33:52,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392357564] [2021-06-05 16:33:52,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:33:52,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:52,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:33:52,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:33:52,018 INFO L87 Difference]: Start difference. First operand 2051 states and 7033 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) [2021-06-05 16:33:52,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:52,898 INFO L93 Difference]: Finished difference Result 2527 states and 8437 transitions. [2021-06-05 16:33:52,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:33:52,898 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 [2021-06-05 16:33:52,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:52,902 INFO L225 Difference]: With dead ends: 2527 [2021-06-05 16:33:52,902 INFO L226 Difference]: Without dead ends: 2481 [2021-06-05 16:33:52,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 848.9ms TimeCoverageRelationStatistics Valid=268, Invalid=922, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:33:52,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-06-05 16:33:52,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2047. [2021-06-05 16:33:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 3.424731182795699) internal successors, (7007), 2046 states have internal predecessors, (7007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:52,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 7007 transitions. [2021-06-05 16:33:52,927 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 7007 transitions. Word has length 26 [2021-06-05 16:33:52,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:52,927 INFO L482 AbstractCegarLoop]: Abstraction has 2047 states and 7007 transitions. [2021-06-05 16:33:52,927 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) [2021-06-05 16:33:52,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 7007 transitions. [2021-06-05 16:33:52,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:52,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:52,929 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:53,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3236,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:53,130 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:53,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:53,130 INFO L82 PathProgramCache]: Analyzing trace with hash 455537647, now seen corresponding path program 57 times [2021-06-05 16:33:53,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:53,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048487526] [2021-06-05 16:33:53,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:53,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:53,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048487526] [2021-06-05 16:33:53,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048487526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:53,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516674453] [2021-06-05 16:33:53,379 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 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 [2021-06-05 16:33:53,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:33:53,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:53,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:33:53,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:53,749 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 16:33:54,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,054 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 16:33:54,055 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 [2021-06-05 16:33:54,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:54,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,086 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:33:54,086 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 [2021-06-05 16:33:54,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:54,447 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-06-05 16:33:54,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:54,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:54,480 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 [2021-06-05 16:33:54,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:54,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,513 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:33:54,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:54,515 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:54,866 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 16:33:54,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:54,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,903 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:33:54,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 16:33:54,907 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:54,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,933 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 16:33:54,933 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 [2021-06-05 16:33:54,934 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:55,523 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 135 [2021-06-05 16:33:55,524 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.5 percent of original size [2021-06-05 16:33:55,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:55,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:55,559 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:33:55,559 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 [2021-06-05 16:33:55,560 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:55,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:55,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:55,585 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:33:55,585 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 [2021-06-05 16:33:55,586 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:55,871 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-05 16:33:55,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:55,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:55,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:55,906 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:33:55,906 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 35 [2021-06-05 16:33:55,907 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:55,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:55,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:55,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:55,932 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 16:33:55,937 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:56,463 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 119 [2021-06-05 16:33:56,463 INFO L628 ElimStorePlain]: treesize reduction 28, result has 94.5 percent of original size [2021-06-05 16:33:56,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:56,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:56,491 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:33:56,491 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 30 treesize of output 28 [2021-06-05 16:33:56,492 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:56,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:56,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:56,516 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:33:56,516 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 [2021-06-05 16:33:56,520 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:56,950 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 107 [2021-06-05 16:33:56,950 INFO L628 ElimStorePlain]: treesize reduction 26, result has 94.1 percent of original size [2021-06-05 16:33:56,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:56,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:56,980 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:33:56,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:56,983 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:56,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:56,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:57,004 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:33:57,004 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 32 treesize of output 26 [2021-06-05 16:33:57,006 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:57,205 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 16:33:57,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:57,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:57,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:57,235 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:33:57,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:57,237 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:57,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:57,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:57,261 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:33:57,262 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 35 treesize of output 35 [2021-06-05 16:33:57,266 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:57,598 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2021-06-05 16:33:57,599 INFO L628 ElimStorePlain]: treesize reduction 24, result has 92.8 percent of original size [2021-06-05 16:33:57,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 16:33:57,610 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:721, output treesize:301 [2021-06-05 16:33:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:57,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516674453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:57,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:57,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:33:57,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844784477] [2021-06-05 16:33:57,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:33:57,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:57,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:33:57,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:33:57,755 INFO L87 Difference]: Start difference. First operand 2047 states and 7007 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) [2021-06-05 16:33:58,932 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 16:33:59,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:59,150 INFO L93 Difference]: Finished difference Result 2628 states and 8841 transitions. [2021-06-05 16:33:59,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:33:59,150 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 [2021-06-05 16:33:59,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:59,154 INFO L225 Difference]: With dead ends: 2628 [2021-06-05 16:33:59,154 INFO L226 Difference]: Without dead ends: 2613 [2021-06-05 16:33:59,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1310.5ms TimeCoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:33:59,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-06-05 16:33:59,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2062. [2021-06-05 16:33:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 3.430373605046094) internal successors, (7070), 2061 states have internal predecessors, (7070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 7070 transitions. [2021-06-05 16:33:59,178 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 7070 transitions. Word has length 26 [2021-06-05 16:33:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:59,178 INFO L482 AbstractCegarLoop]: Abstraction has 2062 states and 7070 transitions. [2021-06-05 16:33:59,178 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) [2021-06-05 16:33:59,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 7070 transitions. [2021-06-05 16:33:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:59,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:59,181 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:59,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3250 [2021-06-05 16:33:59,381 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:59,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:59,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1197737873, now seen corresponding path program 47 times [2021-06-05 16:33:59,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:59,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119652515] [2021-06-05 16:33:59,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:59,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:59,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119652515] [2021-06-05 16:33:59,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119652515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:59,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715647102] [2021-06-05 16:33:59,635 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 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 [2021-06-05 16:33:59,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:33:59,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:59,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:33:59,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:00,036 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:34:00,221 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 16:34:00,507 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 50 [2021-06-05 16:34:00,557 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_390, v_prenex_391]} [2021-06-05 16:34:00,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:00,561 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 [2021-06-05 16:34:00,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:00,658 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-06-05 16:34:00,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:00,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:00,662 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 23 treesize of output 13 [2021-06-05 16:34:00,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:00,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:00,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:00,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:00,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:00,710 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 30 treesize of output 16 [2021-06-05 16:34:00,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:00,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:00,714 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 23 treesize of output 13 [2021-06-05 16:34:00,714 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:00,760 INFO L628 ElimStorePlain]: treesize reduction 13, result has 79.4 percent of original size [2021-06-05 16:34:00,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:34:00,762 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:32 [2021-06-05 16:34:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:00,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715647102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:00,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:00,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:34:00,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272558652] [2021-06-05 16:34:00,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:34:00,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:00,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:34:00,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:34:00,811 INFO L87 Difference]: Start difference. First operand 2062 states and 7070 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) [2021-06-05 16:34:01,468 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 16:34:01,952 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 119 [2021-06-05 16:34:02,480 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2021-06-05 16:34:02,954 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 86 [2021-06-05 16:34:03,374 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 125 [2021-06-05 16:34:03,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:03,690 INFO L93 Difference]: Finished difference Result 2678 states and 8891 transitions. [2021-06-05 16:34:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:34:03,690 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 [2021-06-05 16:34:03,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:03,693 INFO L225 Difference]: With dead ends: 2678 [2021-06-05 16:34:03,693 INFO L226 Difference]: Without dead ends: 2648 [2021-06-05 16:34:03,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 3062.7ms TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:34:03,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-06-05 16:34:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2073. [2021-06-05 16:34:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 2072 states have (on average 3.4305019305019306) internal successors, (7108), 2072 states have internal predecessors, (7108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 7108 transitions. [2021-06-05 16:34:03,718 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 7108 transitions. Word has length 26 [2021-06-05 16:34:03,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:03,718 INFO L482 AbstractCegarLoop]: Abstraction has 2073 states and 7108 transitions. [2021-06-05 16:34:03,718 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) [2021-06-05 16:34:03,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 7108 transitions. [2021-06-05 16:34:03,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:03,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:03,721 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:03,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3315 [2021-06-05 16:34:03,921 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:03,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:03,921 INFO L82 PathProgramCache]: Analyzing trace with hash 352643691, now seen corresponding path program 58 times [2021-06-05 16:34:03,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:03,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771068868] [2021-06-05 16:34:03,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:04,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:04,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771068868] [2021-06-05 16:34:04,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771068868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:04,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548715903] [2021-06-05 16:34:04,060 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 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 [2021-06-05 16:34:04,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:34:04,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:04,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:34:04,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:04,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,553 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 [2021-06-05 16:34:04,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,560 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 [2021-06-05 16:34:04,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:34:04,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:34:04,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,583 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 [2021-06-05 16:34:04,584 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,590 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 [2021-06-05 16:34:04,591 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:34:04,598 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,605 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 [2021-06-05 16:34:04,605 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:34:04,613 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,620 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 39 treesize of output 16 [2021-06-05 16:34:04,621 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,628 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 [2021-06-05 16:34:04,628 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,635 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 [2021-06-05 16:34:04,636 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,642 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 [2021-06-05 16:34:04,643 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,649 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 [2021-06-05 16:34:04,649 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,653 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 28 treesize of output 13 [2021-06-05 16:34:04,653 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,674 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-06-05 16:34:04,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:34:04,675 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:34:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:04,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548715903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:04,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:04,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 16:34:04,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999382164] [2021-06-05 16:34:04,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:34:04,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:04,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:34:04,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:34:04,698 INFO L87 Difference]: Start difference. First operand 2073 states and 7108 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) [2021-06-05 16:34:05,732 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-06-05 16:34:06,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:06,058 INFO L93 Difference]: Finished difference Result 3338 states and 10716 transitions. [2021-06-05 16:34:06,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:34:06,058 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 [2021-06-05 16:34:06,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:06,063 INFO L225 Difference]: With dead ends: 3338 [2021-06-05 16:34:06,063 INFO L226 Difference]: Without dead ends: 3295 [2021-06-05 16:34:06,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1130.9ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:34:06,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3295 states. [2021-06-05 16:34:06,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3295 to 2202. [2021-06-05 16:34:06,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 3.452975920036347) internal successors, (7600), 2201 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 7600 transitions. [2021-06-05 16:34:06,095 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 7600 transitions. Word has length 26 [2021-06-05 16:34:06,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:06,095 INFO L482 AbstractCegarLoop]: Abstraction has 2202 states and 7600 transitions. [2021-06-05 16:34:06,095 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) [2021-06-05 16:34:06,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 7600 transitions. [2021-06-05 16:34:06,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:06,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:06,097 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:06,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3330 [2021-06-05 16:34:06,298 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:06,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:06,298 INFO L82 PathProgramCache]: Analyzing trace with hash 392132503, now seen corresponding path program 48 times [2021-06-05 16:34:06,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:06,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679379106] [2021-06-05 16:34:06,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:06,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:06,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679379106] [2021-06-05 16:34:06,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679379106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:06,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265637249] [2021-06-05 16:34:06,566 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 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 [2021-06-05 16:34:06,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:34:06,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:06,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:34:06,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:07,039 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 16:34:07,424 INFO L446 ElimStorePlain]: Different costs {28=[v_prenex_418], 45=[A]} [2021-06-05 16:34:07,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,455 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 16:34:07,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 33 [2021-06-05 16:34:07,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,490 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:34:07,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:34:07,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,525 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:34:07,525 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 37 [2021-06-05 16:34:07,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,547 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-05 16:34:07,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 [2021-06-05 16:34:07,548 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,566 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-05 16:34:07,566 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:34:07,567 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,592 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 16:34:07,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:34:07,594 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,959 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 115 [2021-06-05 16:34:07,959 INFO L628 ElimStorePlain]: treesize reduction 162, result has 71.7 percent of original size [2021-06-05 16:34:07,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:07,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 36 [2021-06-05 16:34:07,984 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:08,009 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 16:34:08,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:34:08,011 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:08,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:08,036 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:34:08,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 31 [2021-06-05 16:34:08,048 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:08,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:08,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:08,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 36 [2021-06-05 16:34:08,081 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:08,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:08,108 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:34:08,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-06-05 16:34:08,110 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:08,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:08,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:08,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 32 [2021-06-05 16:34:08,131 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:08,278 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 16:34:08,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:08,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 2 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:34:08,302 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 16 variables, input treesize:801, output treesize:513 [2021-06-05 16:34:08,484 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-06-05 16:34:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:08,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265637249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:08,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:08,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:34:08,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616954362] [2021-06-05 16:34:08,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:34:08,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:08,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:34:08,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:34:08,606 INFO L87 Difference]: Start difference. First operand 2202 states and 7600 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) [2021-06-05 16:34:09,301 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-05 16:34:09,704 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2021-06-05 16:34:10,181 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-06-05 16:34:10,457 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 94 [2021-06-05 16:34:10,885 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-06-05 16:34:11,513 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 108 [2021-06-05 16:34:12,271 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 108 [2021-06-05 16:34:12,488 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-05 16:34:12,800 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-06-05 16:34:13,101 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-05 16:34:13,270 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-06-05 16:34:13,760 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2021-06-05 16:34:14,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:14,057 INFO L93 Difference]: Finished difference Result 3312 states and 10745 transitions. [2021-06-05 16:34:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:34:14,057 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 [2021-06-05 16:34:14,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:14,061 INFO L225 Difference]: With dead ends: 3312 [2021-06-05 16:34:14,062 INFO L226 Difference]: Without dead ends: 3267 [2021-06-05 16:34:14,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 5356.6ms TimeCoverageRelationStatistics Valid=404, Invalid=2046, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:34:14,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2021-06-05 16:34:14,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 2225. [2021-06-05 16:34:14,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2224 states have (on average 3.459982014388489) internal successors, (7695), 2224 states have internal predecessors, (7695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 7695 transitions. [2021-06-05 16:34:14,102 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 7695 transitions. Word has length 26 [2021-06-05 16:34:14,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:14,102 INFO L482 AbstractCegarLoop]: Abstraction has 2225 states and 7695 transitions. [2021-06-05 16:34:14,102 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) [2021-06-05 16:34:14,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 7695 transitions. [2021-06-05 16:34:14,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:14,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:14,105 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:14,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3420,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:14,305 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:14,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:14,306 INFO L82 PathProgramCache]: Analyzing trace with hash -658448197, now seen corresponding path program 49 times [2021-06-05 16:34:14,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:14,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444114230] [2021-06-05 16:34:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:14,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:14,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444114230] [2021-06-05 16:34:14,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444114230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:14,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477575596] [2021-06-05 16:34:14,534 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 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 [2021-06-05 16:34:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:14,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:34:14,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:14,830 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-06-05 16:34:14,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:14,940 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:14,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:34:14,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:14,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:14,961 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:14,962 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 [2021-06-05 16:34:14,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:15,296 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 122 [2021-06-05 16:34:15,296 INFO L628 ElimStorePlain]: treesize reduction 71, result has 83.9 percent of original size [2021-06-05 16:34:15,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:15,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:15,313 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 24 [2021-06-05 16:34:15,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:15,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:15,325 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:15,325 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 1 [2021-06-05 16:34:15,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:15,449 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-05 16:34:15,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:15,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:15,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:15,462 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 26 treesize of output 24 [2021-06-05 16:34:15,463 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:15,587 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 16:34:15,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:15,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:15,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:15,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:34:15,602 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:15,720 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:34:15,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:15,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:15,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:15,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:34:15,736 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:15,846 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 16:34:15,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:15,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:15,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:15,861 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 30 treesize of output 24 [2021-06-05 16:34:15,865 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:15,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:15,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:15,877 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 24 [2021-06-05 16:34:15,879 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:16,056 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-06-05 16:34:16,056 INFO L628 ElimStorePlain]: treesize reduction 18, result has 92.1 percent of original size [2021-06-05 16:34:16,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:16,068 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:16,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:34:16,069 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:16,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:16,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:16,177 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:16,177 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 [2021-06-05 16:34:16,178 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:16,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:16,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:34:16,260 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:503, output treesize:150 [2021-06-05 16:34:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:16,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477575596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:16,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:16,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:34:16,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024848520] [2021-06-05 16:34:16,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:34:16,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:16,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:34:16,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:34:16,382 INFO L87 Difference]: Start difference. First operand 2225 states and 7695 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) [2021-06-05 16:34:17,286 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 16:34:17,408 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-05 16:34:17,586 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-05 16:34:17,731 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-06-05 16:34:18,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:18,098 INFO L93 Difference]: Finished difference Result 3319 states and 10983 transitions. [2021-06-05 16:34:18,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:34:18,098 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 [2021-06-05 16:34:18,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:18,103 INFO L225 Difference]: With dead ends: 3319 [2021-06-05 16:34:18,103 INFO L226 Difference]: Without dead ends: 3289 [2021-06-05 16:34:18,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1758.0ms TimeCoverageRelationStatistics Valid=309, Invalid=1023, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:34:18,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3289 states. [2021-06-05 16:34:18,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3289 to 2211. [2021-06-05 16:34:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2210 states have (on average 3.4547511312217196) internal successors, (7635), 2210 states have internal predecessors, (7635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:18,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 7635 transitions. [2021-06-05 16:34:18,134 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 7635 transitions. Word has length 26 [2021-06-05 16:34:18,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:18,134 INFO L482 AbstractCegarLoop]: Abstraction has 2211 states and 7635 transitions. [2021-06-05 16:34:18,134 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) [2021-06-05 16:34:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 7635 transitions. [2021-06-05 16:34:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:18,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:18,137 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:18,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3451 [2021-06-05 16:34:18,337 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:18,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:18,337 INFO L82 PathProgramCache]: Analyzing trace with hash 578637215, now seen corresponding path program 59 times [2021-06-05 16:34:18,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:18,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060981580] [2021-06-05 16:34:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:18,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:18,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060981580] [2021-06-05 16:34:18,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060981580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:18,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930867857] [2021-06-05 16:34:18,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:18,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:34:18,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:18,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:34:18,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:19,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,006 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 [2021-06-05 16:34:19,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,014 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 [2021-06-05 16:34:19,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,022 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 [2021-06-05 16:34:19,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:34:19,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:34:19,040 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,059 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 [2021-06-05 16:34:19,060 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,071 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 [2021-06-05 16:34:19,072 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,082 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 [2021-06-05 16:34:19,083 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,094 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 [2021-06-05 16:34:19,095 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,106 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 [2021-06-05 16:34:19,107 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:34:19,118 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,129 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 32 treesize of output 16 [2021-06-05 16:34:19,129 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,137 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 [2021-06-05 16:34:19,138 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,145 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 [2021-06-05 16:34:19,145 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:19,149 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 [2021-06-05 16:34:19,150 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,170 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:34:19,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:34:19,171 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:34:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:19,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930867857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:19,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:19,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:34:19,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412498549] [2021-06-05 16:34:19,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:34:19,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:19,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:34:19,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:34:19,199 INFO L87 Difference]: Start difference. First operand 2211 states and 7635 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) [2021-06-05 16:34:20,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:20,207 INFO L93 Difference]: Finished difference Result 3809 states and 12432 transitions. [2021-06-05 16:34:20,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:34:20,207 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 [2021-06-05 16:34:20,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:20,212 INFO L225 Difference]: With dead ends: 3809 [2021-06-05 16:34:20,212 INFO L226 Difference]: Without dead ends: 3779 [2021-06-05 16:34:20,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 951.6ms TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:34:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2021-06-05 16:34:20,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 2344. [2021-06-05 16:34:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 3.458386683738796) internal successors, (8103), 2343 states have internal predecessors, (8103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 8103 transitions. [2021-06-05 16:34:20,246 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 8103 transitions. Word has length 26 [2021-06-05 16:34:20,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:20,247 INFO L482 AbstractCegarLoop]: Abstraction has 2344 states and 8103 transitions. [2021-06-05 16:34:20,247 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) [2021-06-05 16:34:20,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 8103 transitions. [2021-06-05 16:34:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:20,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:20,249 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:20,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:20,450 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:20,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:20,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1882681429, now seen corresponding path program 60 times [2021-06-05 16:34:20,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:20,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994709348] [2021-06-05 16:34:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:20,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:20,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994709348] [2021-06-05 16:34:20,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994709348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:20,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387829080] [2021-06-05 16:34:20,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:20,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:34:20,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:20,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:34:20,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:20,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,833 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:34:20,833 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 30 [2021-06-05 16:34:20,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:20,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,861 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:34:20,861 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 [2021-06-05 16:34:20,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:20,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,891 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-05 16:34:20,891 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 37 [2021-06-05 16:34:20,895 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:20,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,910 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:34:20,911 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 [2021-06-05 16:34:20,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:20,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,938 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-05 16:34:20,938 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 [2021-06-05 16:34:20,942 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:20,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,968 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-06-05 16:34:20,968 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 29 [2021-06-05 16:34:20,970 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:20,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,987 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:34:20,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:34:20,987 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:20,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:20,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,012 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 16:34:21,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:34:21,013 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:21,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,029 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:34:21,029 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 32 treesize of output 1 [2021-06-05 16:34:21,030 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:21,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,056 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-05 16:34:21,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-06-05 16:34:21,057 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:21,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,085 INFO L354 Elim1Store]: treesize reduction 19, result has 38.7 percent of original size [2021-06-05 16:34:21,085 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 30 [2021-06-05 16:34:21,086 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:21,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,104 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:34:21,104 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 [2021-06-05 16:34:21,104 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:21,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,120 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:34:21,120 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 [2021-06-05 16:34:21,121 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:21,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,144 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 16:34:21,144 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 39 treesize of output 25 [2021-06-05 16:34:21,145 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:21,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:21,170 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 43 [2021-06-05 16:34:21,177 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:21,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:21,187 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:34:21,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:34:21,188 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:21,272 INFO L628 ElimStorePlain]: treesize reduction 109, result has 41.7 percent of original size [2021-06-05 16:34:21,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:34:21,273 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:705, output treesize:78 [2021-06-05 16:34:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:21,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387829080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:21,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:21,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 16:34:21,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409548161] [2021-06-05 16:34:21,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:34:21,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:21,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:34:21,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:34:21,361 INFO L87 Difference]: Start difference. First operand 2344 states and 8103 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) [2021-06-05 16:34:22,720 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-05 16:34:22,859 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 16:34:23,236 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-06-05 16:34:23,419 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-06-05 16:34:23,985 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-06-05 16:34:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:24,146 INFO L93 Difference]: Finished difference Result 4305 states and 13885 transitions. [2021-06-05 16:34:24,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:34:24,146 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 [2021-06-05 16:34:24,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:24,152 INFO L225 Difference]: With dead ends: 4305 [2021-06-05 16:34:24,153 INFO L226 Difference]: Without dead ends: 4252 [2021-06-05 16:34:24,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 2445.2ms TimeCoverageRelationStatistics Valid=556, Invalid=2096, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:34:24,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4252 states. [2021-06-05 16:34:24,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4252 to 2347. [2021-06-05 16:34:24,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 3.4578005115089514) internal successors, (8112), 2346 states have internal predecessors, (8112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 8112 transitions. [2021-06-05 16:34:24,192 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 8112 transitions. Word has length 26 [2021-06-05 16:34:24,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:24,192 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 8112 transitions. [2021-06-05 16:34:24,192 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) [2021-06-05 16:34:24,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 8112 transitions. [2021-06-05 16:34:24,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:24,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:24,195 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:24,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3569 [2021-06-05 16:34:24,396 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:24,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:24,396 INFO L82 PathProgramCache]: Analyzing trace with hash 534773347, now seen corresponding path program 50 times [2021-06-05 16:34:24,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:24,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262901780] [2021-06-05 16:34:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:24,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:24,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262901780] [2021-06-05 16:34:24,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262901780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:24,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994924358] [2021-06-05 16:34:24,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:24,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:34:24,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:24,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:34:24,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:24,998 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 16:34:25,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:25,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:25,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:25,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:25,304 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 16:34:25,304 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-06-05 16:34:25,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:25,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:25,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:25,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:25,321 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-05 16:34:25,321 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:34:25,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:25,791 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 124 [2021-06-05 16:34:25,792 INFO L628 ElimStorePlain]: treesize reduction 296, result has 58.8 percent of original size [2021-06-05 16:34:25,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:25,816 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:34:25,816 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:34:25,817 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:25,994 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 16:34:25,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:26,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:26,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:26,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:26,028 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:34:26,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-06-05 16:34:26,032 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:26,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:26,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:26,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 34 [2021-06-05 16:34:26,056 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,363 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2021-06-05 16:34:26,364 INFO L628 ElimStorePlain]: treesize reduction 27, result has 93.0 percent of original size [2021-06-05 16:34:26,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:26,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:26,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:26,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:26,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:26,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 34 [2021-06-05 16:34:26,394 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:26,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:26,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:26,409 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-05 16:34:26,409 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 34 treesize of output 1 [2021-06-05 16:34:26,410 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,539 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 16:34:26,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:26,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:26,562 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:34:26,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:34:26,564 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,698 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 16:34:26,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:26,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:26,719 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:34:26,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 27 [2021-06-05 16:34:26,723 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,848 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 16:34:26,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:26,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:26,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:26,864 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-06-05 16:34:26,868 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,989 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 16:34:26,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:26,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:26,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:26,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:27,012 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:34:27,012 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-05 16:34:27,016 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:27,128 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 16:34:27,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:27,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:34:27,134 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:785, output treesize:295 [2021-06-05 16:34:27,364 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-06-05 16:34:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:27,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994924358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:27,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:27,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:34:27,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987050619] [2021-06-05 16:34:27,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:34:27,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:27,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:34:27,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:34:27,498 INFO L87 Difference]: Start difference. First operand 2347 states and 8112 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) [2021-06-05 16:34:28,154 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-05 16:34:28,439 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-06-05 16:34:28,559 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-05 16:34:28,737 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 16:34:29,004 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-05 16:34:29,131 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-05 16:34:29,457 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-05 16:34:29,826 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-06-05 16:34:30,043 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-06-05 16:34:30,455 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-06-05 16:34:30,718 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-06-05 16:34:30,908 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-05 16:34:31,345 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-05 16:34:31,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:31,822 INFO L93 Difference]: Finished difference Result 3241 states and 10733 transitions. [2021-06-05 16:34:31,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:34:31,822 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 [2021-06-05 16:34:31,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:31,826 INFO L225 Difference]: With dead ends: 3241 [2021-06-05 16:34:31,826 INFO L226 Difference]: Without dead ends: 3211 [2021-06-05 16:34:31,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 4196.7ms TimeCoverageRelationStatistics Valid=353, Invalid=2197, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:34:31,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-06-05 16:34:31,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2360. [2021-06-05 16:34:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 3.454429843153879) internal successors, (8149), 2359 states have internal predecessors, (8149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:31,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 8149 transitions. [2021-06-05 16:34:31,856 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 8149 transitions. Word has length 26 [2021-06-05 16:34:31,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:31,856 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 8149 transitions. [2021-06-05 16:34:31,856 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) [2021-06-05 16:34:31,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 8149 transitions. [2021-06-05 16:34:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:31,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:31,859 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:32,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3599,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:32,059 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:32,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:32,060 INFO L82 PathProgramCache]: Analyzing trace with hash -849869469, now seen corresponding path program 51 times [2021-06-05 16:34:32,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:32,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036036443] [2021-06-05 16:34:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:32,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:32,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036036443] [2021-06-05 16:34:32,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036036443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:32,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551685415] [2021-06-05 16:34:32,375 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 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 [2021-06-05 16:34:32,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:34:32,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:32,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:34:32,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:32,910 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:34:33,127 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 16:34:33,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:33,226 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:33,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:34:33,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:33,623 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 123 [2021-06-05 16:34:33,623 INFO L628 ElimStorePlain]: treesize reduction 130, result has 76.2 percent of original size [2021-06-05 16:34:33,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:33,637 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:33,637 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 [2021-06-05 16:34:33,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:33,803 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 16:34:33,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:33,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:33,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:33,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:34:33,820 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:33,976 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:34:33,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:33,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:33,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:33,990 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 26 treesize of output 24 [2021-06-05 16:34:33,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:34,146 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 16:34:34,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:34,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:34,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:34,160 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 [2021-06-05 16:34:34,164 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:34,309 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 16:34:34,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:34,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:34,322 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:34,322 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 [2021-06-05 16:34:34,323 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:34,467 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 16:34:34,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:34,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:34,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:34,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-06-05 16:34:34,483 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:34,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:34,493 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:34,493 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 30 treesize of output 1 [2021-06-05 16:34:34,493 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:34,634 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:34:34,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:34,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:34,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:34,649 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 24 [2021-06-05 16:34:34,652 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:34,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:34,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:34,664 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 24 [2021-06-05 16:34:34,666 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:34,847 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 16:34:34,847 INFO L628 ElimStorePlain]: treesize reduction 23, result has 90.6 percent of original size [2021-06-05 16:34:34,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:34:34,855 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:563, output treesize:156 [2021-06-05 16:34:35,014 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-06-05 16:34:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:35,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551685415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:35,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:35,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:34:35,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724539835] [2021-06-05 16:34:35,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:34:35,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:35,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:34:35,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:34:35,057 INFO L87 Difference]: Start difference. First operand 2360 states and 8149 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) [2021-06-05 16:34:35,925 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 16:34:36,244 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-05 16:34:36,467 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2021-06-05 16:34:36,685 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2021-06-05 16:34:37,070 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 16:34:37,534 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2021-06-05 16:34:37,965 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-06-05 16:34:38,369 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 123 [2021-06-05 16:34:38,583 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 16:34:39,098 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 108 [2021-06-05 16:34:39,523 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 127 [2021-06-05 16:34:39,748 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-05 16:34:40,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:40,049 INFO L93 Difference]: Finished difference Result 3613 states and 11812 transitions. [2021-06-05 16:34:40,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:34:40,049 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 [2021-06-05 16:34:40,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:40,054 INFO L225 Difference]: With dead ends: 3613 [2021-06-05 16:34:40,054 INFO L226 Difference]: Without dead ends: 3568 [2021-06-05 16:34:40,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 5061.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1712, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:34:40,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2021-06-05 16:34:40,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 2356. [2021-06-05 16:34:40,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 3.456900212314225) internal successors, (8141), 2355 states have internal predecessors, (8141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:40,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 8141 transitions. [2021-06-05 16:34:40,085 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 8141 transitions. Word has length 26 [2021-06-05 16:34:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:40,085 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 8141 transitions. [2021-06-05 16:34:40,085 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) [2021-06-05 16:34:40,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 8141 transitions. [2021-06-05 16:34:40,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:40,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:40,088 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:40,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3640,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:40,291 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:40,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:40,291 INFO L82 PathProgramCache]: Analyzing trace with hash 955312879, now seen corresponding path program 52 times [2021-06-05 16:34:40,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:40,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770304923] [2021-06-05 16:34:40,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:40,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:40,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770304923] [2021-06-05 16:34:40,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770304923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:40,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810278133] [2021-06-05 16:34:40,658 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 [2021-06-05 16:34:40,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:34:40,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:40,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:34:40,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:41,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:41,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:41,144 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 35 treesize of output 27 [2021-06-05 16:34:41,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:41,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:41,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:41,160 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 35 treesize of output 27 [2021-06-05 16:34:41,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:41,482 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2021-06-05 16:34:41,482 INFO L628 ElimStorePlain]: treesize reduction 21, result has 94.3 percent of original size [2021-06-05 16:34:41,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:41,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:41,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:34:41,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:41,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:41,509 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:41,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:34:41,511 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:41,655 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 16:34:41,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:41,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:41,669 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:41,669 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 [2021-06-05 16:34:41,670 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:41,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:41,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:41,680 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 [2021-06-05 16:34:41,683 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:41,817 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 16:34:41,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:41,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:41,834 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:41,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:34:41,836 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:41,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:41,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:41,868 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 [2021-06-05 16:34:41,872 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:42,034 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 16:34:42,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:42,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:42,051 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:42,052 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 20 [2021-06-05 16:34:42,053 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:42,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:42,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:42,066 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 24 [2021-06-05 16:34:42,070 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:42,205 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-05 16:34:42,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:42,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:34:42,213 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:407, output treesize:170 [2021-06-05 16:34:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:42,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810278133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:42,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:42,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:34:42,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992388135] [2021-06-05 16:34:42,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:34:42,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:42,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:34:42,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:34:42,363 INFO L87 Difference]: Start difference. First operand 2356 states and 8141 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) [2021-06-05 16:34:43,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:43,584 INFO L93 Difference]: Finished difference Result 3106 states and 10468 transitions. [2021-06-05 16:34:43,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:34:43,585 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 [2021-06-05 16:34:43,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:43,595 INFO L225 Difference]: With dead ends: 3106 [2021-06-05 16:34:43,595 INFO L226 Difference]: Without dead ends: 3081 [2021-06-05 16:34:43,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1388.7ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:34:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3081 states. [2021-06-05 16:34:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3081 to 2358. [2021-06-05 16:34:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2358 states, 2357 states have (on average 3.4560882477725925) internal successors, (8146), 2357 states have internal predecessors, (8146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 8146 transitions. [2021-06-05 16:34:43,645 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 8146 transitions. Word has length 26 [2021-06-05 16:34:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:43,645 INFO L482 AbstractCegarLoop]: Abstraction has 2358 states and 8146 transitions. [2021-06-05 16:34:43,645 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) [2021-06-05 16:34:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 8146 transitions. [2021-06-05 16:34:43,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:43,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:43,649 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:43,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-06-05 16:34:43,873 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:43,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:43,873 INFO L82 PathProgramCache]: Analyzing trace with hash -441885819, now seen corresponding path program 61 times [2021-06-05 16:34:43,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:43,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613745688] [2021-06-05 16:34:43,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:44,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:44,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613745688] [2021-06-05 16:34:44,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613745688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:44,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467671101] [2021-06-05 16:34:44,077 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 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 [2021-06-05 16:34:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:44,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:34:44,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:44,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:44,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,576 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 [2021-06-05 16:34:44,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:44,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:44,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,586 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 [2021-06-05 16:34:44,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:44,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:44,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,596 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 [2021-06-05 16:34:44,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:44,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:44,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,605 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 [2021-06-05 16:34:44,606 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:44,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:44,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,613 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 [2021-06-05 16:34:44,614 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:44,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:44,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,621 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 [2021-06-05 16:34:44,622 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:44,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:44,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,629 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 [2021-06-05 16:34:44,629 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:44,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:44,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,636 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 [2021-06-05 16:34:44,637 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:44,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:44,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,644 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 [2021-06-05 16:34:44,645 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:44,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:44,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,652 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 [2021-06-05 16:34:44,653 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:44,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:44,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,660 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 35 treesize of output 19 [2021-06-05 16:34:44,661 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:44,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:44,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:34:44,668 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:44,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:44,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,674 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 32 treesize of output 16 [2021-06-05 16:34:44,675 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:44,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:44,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,681 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 [2021-06-05 16:34:44,682 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:44,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:44,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:44,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:34:44,686 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:44,709 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:34:44,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:34:44,711 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:34:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:44,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467671101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:44,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:44,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:34:44,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503927052] [2021-06-05 16:34:44,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:34:44,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:44,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:34:44,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:34:44,734 INFO L87 Difference]: Start difference. First operand 2358 states and 8146 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) [2021-06-05 16:34:46,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:46,009 INFO L93 Difference]: Finished difference Result 3316 states and 11054 transitions. [2021-06-05 16:34:46,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:34:46,009 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 [2021-06-05 16:34:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:46,013 INFO L225 Difference]: With dead ends: 3316 [2021-06-05 16:34:46,013 INFO L226 Difference]: Without dead ends: 3273 [2021-06-05 16:34:46,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1196.4ms TimeCoverageRelationStatistics Valid=415, Invalid=1477, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:34:46,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-06-05 16:34:46,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2398. [2021-06-05 16:34:46,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 3.4568210262828534) internal successors, (8286), 2397 states have internal predecessors, (8286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 8286 transitions. [2021-06-05 16:34:46,047 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 8286 transitions. Word has length 26 [2021-06-05 16:34:46,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:46,047 INFO L482 AbstractCegarLoop]: Abstraction has 2398 states and 8286 transitions. [2021-06-05 16:34:46,047 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) [2021-06-05 16:34:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 8286 transitions. [2021-06-05 16:34:46,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:46,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:46,050 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:46,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3707 [2021-06-05 16:34:46,250 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:46,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:46,251 INFO L82 PathProgramCache]: Analyzing trace with hash 483608047, now seen corresponding path program 62 times [2021-06-05 16:34:46,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:46,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738591025] [2021-06-05 16:34:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:46,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:46,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738591025] [2021-06-05 16:34:46,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738591025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:46,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568759654] [2021-06-05 16:34:46,452 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 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 [2021-06-05 16:34:46,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:34:46,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:46,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:34:46,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:46,820 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_497], 5=[v_prenex_493, v_prenex_495]} [2021-06-05 16:34:46,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:46,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:46,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:46,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:46,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:34:46,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:46,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:46,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:46,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:46,838 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 23 treesize of output 13 [2021-06-05 16:34:46,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:46,941 INFO L628 ElimStorePlain]: treesize reduction 147, result has 42.1 percent of original size [2021-06-05 16:34:46,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:46,945 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 [2021-06-05 16:34:46,947 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:46,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:46,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:46,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:46,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:34:46,982 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:47,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:47,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:47,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:47,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:47,014 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 [2021-06-05 16:34:47,015 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:47,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:34:47,039 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:307, output treesize:32 [2021-06-05 16:34:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:47,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568759654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:47,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:47,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:34:47,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705096620] [2021-06-05 16:34:47,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:34:47,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:47,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:34:47,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:34:47,080 INFO L87 Difference]: Start difference. First operand 2398 states and 8286 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) [2021-06-05 16:34:48,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:48,625 INFO L93 Difference]: Finished difference Result 3303 states and 11080 transitions. [2021-06-05 16:34:48,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:34:48,625 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 [2021-06-05 16:34:48,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:48,630 INFO L225 Difference]: With dead ends: 3303 [2021-06-05 16:34:48,630 INFO L226 Difference]: Without dead ends: 3269 [2021-06-05 16:34:48,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1543.9ms TimeCoverageRelationStatistics Valid=478, Invalid=1592, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:34:48,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3269 states. [2021-06-05 16:34:48,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3269 to 2372. [2021-06-05 16:34:48,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2371 states have (on average 3.4571910586250527) internal successors, (8197), 2371 states have internal predecessors, (8197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 8197 transitions. [2021-06-05 16:34:48,662 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 8197 transitions. Word has length 26 [2021-06-05 16:34:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:48,662 INFO L482 AbstractCegarLoop]: Abstraction has 2372 states and 8197 transitions. [2021-06-05 16:34:48,662 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) [2021-06-05 16:34:48,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 8197 transitions. [2021-06-05 16:34:48,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:48,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:48,664 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:48,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3797,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:48,865 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:48,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1804783987, now seen corresponding path program 53 times [2021-06-05 16:34:48,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:48,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263152162] [2021-06-05 16:34:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:49,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:49,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263152162] [2021-06-05 16:34:49,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263152162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:49,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401707078] [2021-06-05 16:34:49,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:49,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:34:49,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:49,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:34:49,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:49,609 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 16:34:49,862 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 66 [2021-06-05 16:34:50,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:50,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:50,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:50,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:34:50,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:50,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:50,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:50,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:34:50,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:50,096 INFO L628 ElimStorePlain]: treesize reduction 69, result has 56.3 percent of original size [2021-06-05 16:34:50,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:50,100 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 [2021-06-05 16:34:50,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:50,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:50,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:50,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:50,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:50,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-06-05 16:34:50,136 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:50,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:50,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:34:50,166 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:201, output treesize:32 [2021-06-05 16:34:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:50,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401707078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:50,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:50,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:34:50,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534756532] [2021-06-05 16:34:50,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:34:50,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:50,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:34:50,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:34:50,205 INFO L87 Difference]: Start difference. First operand 2372 states and 8197 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) [2021-06-05 16:34:51,065 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:34:51,697 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 108 [2021-06-05 16:34:51,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:51,986 INFO L93 Difference]: Finished difference Result 3196 states and 10649 transitions. [2021-06-05 16:34:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:34:51,986 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 [2021-06-05 16:34:51,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:51,990 INFO L225 Difference]: With dead ends: 3196 [2021-06-05 16:34:51,991 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 16:34:51,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2040.6ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:34:51,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 16:34:52,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2383. [2021-06-05 16:34:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2383 states, 2382 states have (on average 3.4554995801847186) internal successors, (8231), 2382 states have internal predecessors, (8231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2383 states to 2383 states and 8231 transitions. [2021-06-05 16:34:52,020 INFO L78 Accepts]: Start accepts. Automaton has 2383 states and 8231 transitions. Word has length 26 [2021-06-05 16:34:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:52,021 INFO L482 AbstractCegarLoop]: Abstraction has 2383 states and 8231 transitions. [2021-06-05 16:34:52,021 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) [2021-06-05 16:34:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2383 states and 8231 transitions. [2021-06-05 16:34:52,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:52,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:52,039 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:52,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3811 [2021-06-05 16:34:52,239 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:52,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:52,239 INFO L82 PathProgramCache]: Analyzing trace with hash 676615347, now seen corresponding path program 54 times [2021-06-05 16:34:52,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:52,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247372410] [2021-06-05 16:34:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:52,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:52,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247372410] [2021-06-05 16:34:52,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247372410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:52,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864112291] [2021-06-05 16:34:52,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:52,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:34:52,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:52,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:34:52,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:53,081 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 16:34:53,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:53,177 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-06-05 16:34:53,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:34:53,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:53,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:53,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:53,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 36 [2021-06-05 16:34:53,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:53,600 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 102 [2021-06-05 16:34:53,601 INFO L628 ElimStorePlain]: treesize reduction 32, result has 94.4 percent of original size [2021-06-05 16:34:53,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:53,625 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-06-05 16:34:53,625 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 30 [2021-06-05 16:34:53,626 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:53,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:53,649 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-06-05 16:34:53,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 34 [2021-06-05 16:34:53,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:53,836 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 16:34:53,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:53,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:53,859 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-06-05 16:34:53,859 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 16:34:53,861 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:53,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:53,883 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-06-05 16:34:53,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 [2021-06-05 16:34:53,884 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:54,065 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 16:34:54,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:54,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:54,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:54,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 38 [2021-06-05 16:34:54,089 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:54,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:54,110 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-06-05 16:34:54,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 34 [2021-06-05 16:34:54,112 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:54,474 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2021-06-05 16:34:54,474 INFO L628 ElimStorePlain]: treesize reduction 19, result has 95.7 percent of original size [2021-06-05 16:34:54,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:54,498 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-06-05 16:34:54,498 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 36 [2021-06-05 16:34:54,502 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:54,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:54,519 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-06-05 16:34:54,519 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 32 [2021-06-05 16:34:54,520 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:54,673 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 16:34:54,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:54,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:34:54,684 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:613, output treesize:428 [2021-06-05 16:34:54,843 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-06-05 16:34:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:55,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864112291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:55,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:55,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 16:34:55,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864416569] [2021-06-05 16:34:55,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:34:55,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:55,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:34:55,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:34:55,019 INFO L87 Difference]: Start difference. First operand 2383 states and 8231 transitions. Second operand has 20 states, 20 states have (on average 2.45) 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) [2021-06-05 16:34:56,211 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2021-06-05 16:34:56,689 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-06-05 16:34:57,146 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-05 16:34:57,338 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-06-05 16:34:57,517 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 23 [2021-06-05 16:34:57,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:57,711 INFO L93 Difference]: Finished difference Result 3199 states and 10757 transitions. [2021-06-05 16:34:57,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:34:57,711 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) 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 [2021-06-05 16:34:57,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:57,715 INFO L225 Difference]: With dead ends: 3199 [2021-06-05 16:34:57,715 INFO L226 Difference]: Without dead ends: 3174 [2021-06-05 16:34:57,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2692.1ms TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:34:57,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-06-05 16:34:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 2376. [2021-06-05 16:34:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2375 states have (on average 3.4530526315789474) internal successors, (8201), 2375 states have internal predecessors, (8201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:57,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 8201 transitions. [2021-06-05 16:34:57,744 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 8201 transitions. Word has length 26 [2021-06-05 16:34:57,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:57,744 INFO L482 AbstractCegarLoop]: Abstraction has 2376 states and 8201 transitions. [2021-06-05 16:34:57,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) 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) [2021-06-05 16:34:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 8201 transitions. [2021-06-05 16:34:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:57,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:57,747 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:57,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3828,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:57,949 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:57,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1700400349, now seen corresponding path program 55 times [2021-06-05 16:34:57,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:57,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018448369] [2021-06-05 16:34:57,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:58,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:58,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018448369] [2021-06-05 16:34:58,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018448369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:58,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364973226] [2021-06-05 16:34:58,202 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 [2021-06-05 16:34:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:58,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:34:58,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:58,674 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:34:58,768 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_536, A, v_prenex_538, v_prenex_539, v_prenex_543, v_prenex_533, v_prenex_535], 3=[v_prenex_541]} [2021-06-05 16:34:58,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:58,783 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:58,783 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 [2021-06-05 16:34:58,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:58,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:58,798 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:58,798 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 [2021-06-05 16:34:58,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:59,138 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 126 [2021-06-05 16:34:59,139 INFO L628 ElimStorePlain]: treesize reduction 71, result has 84.0 percent of original size [2021-06-05 16:34:59,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:59,154 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:59,154 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 28 treesize of output 20 [2021-06-05 16:34:59,155 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:59,298 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 16:34:59,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:59,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:59,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:59,315 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 24 [2021-06-05 16:34:59,316 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:59,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:59,328 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:59,328 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 1 [2021-06-05 16:34:59,328 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:59,449 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:34:59,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:59,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:59,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:59,465 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 30 treesize of output 24 [2021-06-05 16:34:59,468 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:59,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:59,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:59,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-06-05 16:34:59,483 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:59,677 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 104 [2021-06-05 16:34:59,678 INFO L628 ElimStorePlain]: treesize reduction 18, result has 93.2 percent of original size [2021-06-05 16:34:59,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:59,690 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:59,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:34:59,692 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:59,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:59,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:59,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:59,797 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 [2021-06-05 16:34:59,801 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:59,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:59,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:59,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:59,898 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 [2021-06-05 16:34:59,899 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:59,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:59,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:59,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:59,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:59,992 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 [2021-06-05 16:34:59,995 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:00,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:00,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:35:00,076 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:507, output treesize:154 [2021-06-05 16:35:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:00,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364973226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:00,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:00,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:35:00,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953563709] [2021-06-05 16:35:00,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:35:00,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:00,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:35:00,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:35:00,200 INFO L87 Difference]: Start difference. First operand 2376 states and 8201 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) [2021-06-05 16:35:01,106 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:35:01,295 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 16:35:01,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:01,623 INFO L93 Difference]: Finished difference Result 3405 states and 11394 transitions. [2021-06-05 16:35:01,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:35:01,623 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 [2021-06-05 16:35:01,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:01,628 INFO L225 Difference]: With dead ends: 3405 [2021-06-05 16:35:01,628 INFO L226 Difference]: Without dead ends: 3375 [2021-06-05 16:35:01,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1588.9ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:35:01,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2021-06-05 16:35:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2353. [2021-06-05 16:35:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2353 states, 2352 states have (on average 3.453231292517007) internal successors, (8122), 2352 states have internal predecessors, (8122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 8122 transitions. [2021-06-05 16:35:01,658 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 8122 transitions. Word has length 26 [2021-06-05 16:35:01,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:01,658 INFO L482 AbstractCegarLoop]: Abstraction has 2353 states and 8122 transitions. [2021-06-05 16:35:01,659 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) [2021-06-05 16:35:01,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 8122 transitions. [2021-06-05 16:35:01,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:01,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:01,661 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:01,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3863,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:01,862 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:01,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1133811217, now seen corresponding path program 56 times [2021-06-05 16:35:01,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:01,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355989612] [2021-06-05 16:35:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:02,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:02,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355989612] [2021-06-05 16:35:02,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355989612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:02,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473512939] [2021-06-05 16:35:02,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:35:02,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:02,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:02,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:35:02,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:02,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:02,341 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:02,341 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 [2021-06-05 16:35:02,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:02,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:02,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:02,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:35:02,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:02,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:02,365 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:02,365 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 [2021-06-05 16:35:02,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:02,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:02,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:02,377 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 35 treesize of output 27 [2021-06-05 16:35:02,380 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:02,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:02,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:02,392 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 [2021-06-05 16:35:02,396 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:02,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:02,408 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:35:02,408 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 35 treesize of output 23 [2021-06-05 16:35:02,409 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:02,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:02,418 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:02,418 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 [2021-06-05 16:35:02,419 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:02,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:02,428 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:02,428 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 [2021-06-05 16:35:02,428 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:02,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:02,438 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:02,438 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 1 [2021-06-05 16:35:02,439 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:02,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:02,451 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:35:02,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-06-05 16:35:02,452 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:02,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:02,463 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:35:02,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:35:02,465 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:02,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:02,475 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:02,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-06-05 16:35:02,476 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:02,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:02,485 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:02,485 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 35 treesize of output 1 [2021-06-05 16:35:02,486 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:02,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:02,494 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:02,494 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 [2021-06-05 16:35:02,495 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:02,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:02,503 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:02,503 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 [2021-06-05 16:35:02,504 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:02,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:02,511 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:35:02,512 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 [2021-06-05 16:35:02,513 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:02,600 INFO L628 ElimStorePlain]: treesize reduction 16, result has 85.6 percent of original size [2021-06-05 16:35:02,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:35:02,601 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:95 [2021-06-05 16:35:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:02,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473512939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:02,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:02,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:35:02,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814550376] [2021-06-05 16:35:02,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:35:02,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:02,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:35:02,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:35:02,703 INFO L87 Difference]: Start difference. First operand 2353 states and 8122 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) [2021-06-05 16:35:03,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:03,671 INFO L93 Difference]: Finished difference Result 3078 states and 10413 transitions. [2021-06-05 16:35:03,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:35:03,672 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 [2021-06-05 16:35:03,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:03,676 INFO L225 Difference]: With dead ends: 3078 [2021-06-05 16:35:03,676 INFO L226 Difference]: Without dead ends: 3063 [2021-06-05 16:35:03,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 941.7ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:35:03,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3063 states. [2021-06-05 16:35:03,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3063 to 2355. [2021-06-05 16:35:03,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.45624468988955) internal successors, (8136), 2354 states have internal predecessors, (8136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 8136 transitions. [2021-06-05 16:35:03,708 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 8136 transitions. Word has length 26 [2021-06-05 16:35:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:03,708 INFO L482 AbstractCegarLoop]: Abstraction has 2355 states and 8136 transitions. [2021-06-05 16:35:03,708 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) [2021-06-05 16:35:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 8136 transitions. [2021-06-05 16:35:03,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:03,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:03,711 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:03,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3893,119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:03,911 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:03,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:03,912 INFO L82 PathProgramCache]: Analyzing trace with hash 118535907, now seen corresponding path program 63 times [2021-06-05 16:35:03,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:03,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299406412] [2021-06-05 16:35:03,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:04,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:04,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299406412] [2021-06-05 16:35:04,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299406412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:04,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199353387] [2021-06-05 16:35:04,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:35:04,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:35:04,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:04,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:35:04,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:04,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,581 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:35:04,581 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 35 [2021-06-05 16:35:04,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:04,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:04,609 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 [2021-06-05 16:35:04,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:04,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:04,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:35:04,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:04,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,671 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:35:04,671 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 [2021-06-05 16:35:04,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:04,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,699 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-05 16:35:04,699 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 28 [2021-06-05 16:35:04,700 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:04,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,717 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:35:04,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:35:04,718 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:04,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,746 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:35:04,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:35:04,750 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:04,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,766 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:35:04,767 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 [2021-06-05 16:35:04,767 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:04,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,784 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:35:04,784 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 [2021-06-05 16:35:04,785 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:04,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,801 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:35:04,801 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 34 treesize of output 1 [2021-06-05 16:35:04,802 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:04,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,826 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:35:04,826 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 [2021-06-05 16:35:04,828 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:04,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,845 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:35:04,845 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 [2021-06-05 16:35:04,846 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:04,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,870 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-05 16:35:04,870 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 [2021-06-05 16:35:04,872 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:04,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,887 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:35:04,887 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 [2021-06-05 16:35:04,888 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:04,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,903 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:35:04,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 16:35:04,904 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:04,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:04,913 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:35:04,913 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 [2021-06-05 16:35:04,914 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:05,008 INFO L628 ElimStorePlain]: treesize reduction 92, result has 50.3 percent of original size [2021-06-05 16:35:05,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:35:05,010 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-06-05 16:35:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:05,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199353387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:05,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:05,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:35:05,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157732906] [2021-06-05 16:35:05,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:35:05,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:05,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:35:05,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:35:05,096 INFO L87 Difference]: Start difference. First operand 2355 states and 8136 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) [2021-06-05 16:35:07,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:07,605 INFO L93 Difference]: Finished difference Result 3597 states and 11910 transitions. [2021-06-05 16:35:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:35:07,606 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 [2021-06-05 16:35:07,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:07,611 INFO L225 Difference]: With dead ends: 3597 [2021-06-05 16:35:07,611 INFO L226 Difference]: Without dead ends: 3553 [2021-06-05 16:35:07,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 2169.0ms TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:35:07,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2021-06-05 16:35:07,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2397. [2021-06-05 16:35:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2397 states, 2396 states have (on average 3.451585976627713) internal successors, (8270), 2396 states have internal predecessors, (8270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:07,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 8270 transitions. [2021-06-05 16:35:07,648 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 8270 transitions. Word has length 26 [2021-06-05 16:35:07,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:07,649 INFO L482 AbstractCegarLoop]: Abstraction has 2397 states and 8270 transitions. [2021-06-05 16:35:07,649 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) [2021-06-05 16:35:07,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 8270 transitions. [2021-06-05 16:35:07,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:07,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:07,652 INFO L521 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] [2021-06-05 16:35:07,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3914 [2021-06-05 16:35:07,853 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:07,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:07,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1407294025, now seen corresponding path program 57 times [2021-06-05 16:35:07,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:07,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404375227] [2021-06-05 16:35:07,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:07,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:07,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404375227] [2021-06-05 16:35:07,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404375227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:07,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132613415] [2021-06-05 16:35:07,896 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 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 [2021-06-05 16:35:07,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:35:07,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:07,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:07,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:08,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132613415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:08,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:08,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:35:08,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227933548] [2021-06-05 16:35:08,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:35:08,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:08,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:35:08,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:35:08,020 INFO L87 Difference]: Start difference. First operand 2397 states and 8270 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) [2021-06-05 16:35:08,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:08,967 INFO L93 Difference]: Finished difference Result 5478 states and 17219 transitions. [2021-06-05 16:35:08,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:35:08,968 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 [2021-06-05 16:35:08,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:08,975 INFO L225 Difference]: With dead ends: 5478 [2021-06-05 16:35:08,975 INFO L226 Difference]: Without dead ends: 5478 [2021-06-05 16:35:08,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 552.0ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:35:08,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2021-06-05 16:35:09,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 2593. [2021-06-05 16:35:09,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2592 states have (on average 3.493827160493827) internal successors, (9056), 2592 states have internal predecessors, (9056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 9056 transitions. [2021-06-05 16:35:09,022 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 9056 transitions. Word has length 28 [2021-06-05 16:35:09,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:09,023 INFO L482 AbstractCegarLoop]: Abstraction has 2593 states and 9056 transitions. [2021-06-05 16:35:09,023 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) [2021-06-05 16:35:09,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 9056 transitions. [2021-06-05 16:35:09,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:09,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:09,026 INFO L521 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] [2021-06-05 16:35:09,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4015,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:09,226 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:09,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:09,226 INFO L82 PathProgramCache]: Analyzing trace with hash 430975181, now seen corresponding path program 58 times [2021-06-05 16:35:09,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:09,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398851053] [2021-06-05 16:35:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:09,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:09,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398851053] [2021-06-05 16:35:09,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398851053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:09,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732780202] [2021-06-05 16:35:09,293 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 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 [2021-06-05 16:35:09,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:35:09,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:09,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:09,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:09,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732780202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:09,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:09,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:35:09,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751687207] [2021-06-05 16:35:09,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:35:09,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:09,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:35:09,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:35:09,440 INFO L87 Difference]: Start difference. First operand 2593 states and 9056 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) [2021-06-05 16:35:10,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:10,737 INFO L93 Difference]: Finished difference Result 7165 states and 22139 transitions. [2021-06-05 16:35:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:35:10,737 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 [2021-06-05 16:35:10,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:10,749 INFO L225 Difference]: With dead ends: 7165 [2021-06-05 16:35:10,749 INFO L226 Difference]: Without dead ends: 7165 [2021-06-05 16:35:10,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 774.3ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 16:35:10,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7165 states. [2021-06-05 16:35:10,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7165 to 2604. [2021-06-05 16:35:10,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 2603 states have (on average 3.4998079139454474) internal successors, (9110), 2603 states have internal predecessors, (9110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 9110 transitions. [2021-06-05 16:35:10,830 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 9110 transitions. Word has length 28 [2021-06-05 16:35:10,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:10,830 INFO L482 AbstractCegarLoop]: Abstraction has 2604 states and 9110 transitions. [2021-06-05 16:35:10,830 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) [2021-06-05 16:35:10,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 9110 transitions. [2021-06-05 16:35:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:10,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:10,833 INFO L521 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] [2021-06-05 16:35:11,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4016,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:11,034 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:11,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:11,034 INFO L82 PathProgramCache]: Analyzing trace with hash 997927261, now seen corresponding path program 59 times [2021-06-05 16:35:11,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:11,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164294878] [2021-06-05 16:35:11,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:11,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:11,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164294878] [2021-06-05 16:35:11,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164294878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:11,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801188275] [2021-06-05 16:35:11,076 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 [2021-06-05 16:35:11,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:35:11,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:11,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:11,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:11,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801188275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:11,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:11,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:35:11,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121685524] [2021-06-05 16:35:11,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:35:11,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:11,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:35:11,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:35:11,212 INFO L87 Difference]: Start difference. First operand 2604 states and 9110 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) [2021-06-05 16:35:12,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:12,403 INFO L93 Difference]: Finished difference Result 6563 states and 20685 transitions. [2021-06-05 16:35:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:35:12,404 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 [2021-06-05 16:35:12,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:12,414 INFO L225 Difference]: With dead ends: 6563 [2021-06-05 16:35:12,414 INFO L226 Difference]: Without dead ends: 6563 [2021-06-05 16:35:12,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 729.4ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 16:35:12,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6563 states. [2021-06-05 16:35:12,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6563 to 2552. [2021-06-05 16:35:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 3.480203841630733) internal successors, (8878), 2551 states have internal predecessors, (8878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:12,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 8878 transitions. [2021-06-05 16:35:12,476 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 8878 transitions. Word has length 28 [2021-06-05 16:35:12,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:12,476 INFO L482 AbstractCegarLoop]: Abstraction has 2552 states and 8878 transitions. [2021-06-05 16:35:12,476 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) [2021-06-05 16:35:12,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 8878 transitions. [2021-06-05 16:35:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:12,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:12,480 INFO L521 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] [2021-06-05 16:35:12,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:12,680 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:12,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:12,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2115011713, now seen corresponding path program 60 times [2021-06-05 16:35:12,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:12,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279051426] [2021-06-05 16:35:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:12,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:12,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279051426] [2021-06-05 16:35:12,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279051426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:12,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414545132] [2021-06-05 16:35:12,722 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 [2021-06-05 16:35:12,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:35:12,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:12,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:12,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:12,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414545132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:12,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:12,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:35:12,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532484238] [2021-06-05 16:35:12,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:35:12,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:12,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:35:12,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:35:12,845 INFO L87 Difference]: Start difference. First operand 2552 states and 8878 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) [2021-06-05 16:35:13,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:13,995 INFO L93 Difference]: Finished difference Result 5564 states and 17386 transitions. [2021-06-05 16:35:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:35:13,996 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 [2021-06-05 16:35:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:14,003 INFO L225 Difference]: With dead ends: 5564 [2021-06-05 16:35:14,004 INFO L226 Difference]: Without dead ends: 5564 [2021-06-05 16:35:14,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 655.7ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:35:14,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-06-05 16:35:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 2570. [2021-06-05 16:35:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2569 states have (on average 3.474114441416894) internal successors, (8925), 2569 states have internal predecessors, (8925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:14,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 8925 transitions. [2021-06-05 16:35:14,056 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 8925 transitions. Word has length 28 [2021-06-05 16:35:14,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:14,056 INFO L482 AbstractCegarLoop]: Abstraction has 2570 states and 8925 transitions. [2021-06-05 16:35:14,056 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) [2021-06-05 16:35:14,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 8925 transitions. [2021-06-05 16:35:14,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:14,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:14,059 INFO L521 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] [2021-06-05 16:35:14,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4018,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:14,260 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:14,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:14,260 INFO L82 PathProgramCache]: Analyzing trace with hash 970325317, now seen corresponding path program 64 times [2021-06-05 16:35:14,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:14,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677395703] [2021-06-05 16:35:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:14,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:14,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677395703] [2021-06-05 16:35:14,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677395703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:14,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042446588] [2021-06-05 16:35:14,302 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 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 [2021-06-05 16:35:14,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:35:14,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:14,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:14,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:14,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042446588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:14,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:14,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:35:14,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429912571] [2021-06-05 16:35:14,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:35:14,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:14,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:35:14,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:35:14,418 INFO L87 Difference]: Start difference. First operand 2570 states and 8925 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) [2021-06-05 16:35:15,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:15,005 INFO L93 Difference]: Finished difference Result 4970 states and 15740 transitions. [2021-06-05 16:35:15,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:35:15,005 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 [2021-06-05 16:35:15,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:15,012 INFO L225 Difference]: With dead ends: 4970 [2021-06-05 16:35:15,012 INFO L226 Difference]: Without dead ends: 4970 [2021-06-05 16:35:15,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 322.4ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:35:15,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4970 states. [2021-06-05 16:35:15,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4970 to 2640. [2021-06-05 16:35:15,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 3.4588859416445623) internal successors, (9128), 2639 states have internal predecessors, (9128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 9128 transitions. [2021-06-05 16:35:15,071 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 9128 transitions. Word has length 28 [2021-06-05 16:35:15,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:15,072 INFO L482 AbstractCegarLoop]: Abstraction has 2640 states and 9128 transitions. [2021-06-05 16:35:15,072 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) [2021-06-05 16:35:15,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 9128 transitions. [2021-06-05 16:35:15,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:15,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:15,075 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:15,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4019,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:15,277 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:15,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:15,277 INFO L82 PathProgramCache]: Analyzing trace with hash 828956685, now seen corresponding path program 61 times [2021-06-05 16:35:15,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:15,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690002144] [2021-06-05 16:35:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:35:15,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:15,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690002144] [2021-06-05 16:35:15,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690002144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:15,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113873231] [2021-06-05 16:35:15,307 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 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 [2021-06-05 16:35:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:15,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:35:15,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:35:15,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113873231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:15,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:15,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:35:15,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471356559] [2021-06-05 16:35:15,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:35:15,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:15,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:35:15,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:35:15,391 INFO L87 Difference]: Start difference. First operand 2640 states and 9128 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) [2021-06-05 16:35:15,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:15,565 INFO L93 Difference]: Finished difference Result 4201 states and 13809 transitions. [2021-06-05 16:35:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:35:15,565 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 [2021-06-05 16:35:15,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:15,571 INFO L225 Difference]: With dead ends: 4201 [2021-06-05 16:35:15,571 INFO L226 Difference]: Without dead ends: 4150 [2021-06-05 16:35:15,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:35:15,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2021-06-05 16:35:15,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 2983. [2021-06-05 16:35:15,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2983 states, 2982 states have (on average 3.5087189805499666) internal successors, (10463), 2982 states have internal predecessors, (10463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:15,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 10463 transitions. [2021-06-05 16:35:15,615 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 10463 transitions. Word has length 28 [2021-06-05 16:35:15,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:15,615 INFO L482 AbstractCegarLoop]: Abstraction has 2983 states and 10463 transitions. [2021-06-05 16:35:15,615 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) [2021-06-05 16:35:15,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 10463 transitions. [2021-06-05 16:35:15,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:15,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:15,619 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:15,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-06-05 16:35:15,821 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:15,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:15,821 INFO L82 PathProgramCache]: Analyzing trace with hash 391987977, now seen corresponding path program 62 times [2021-06-05 16:35:15,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:15,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499835318] [2021-06-05 16:35:15,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:15,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:15,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499835318] [2021-06-05 16:35:15,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499835318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:15,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754034184] [2021-06-05 16:35:15,855 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 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 [2021-06-05 16:35:15,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:15,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:15,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:15,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:15,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754034184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:15,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:15,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:35:15,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430601582] [2021-06-05 16:35:15,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:15,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:15,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:15,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:15,971 INFO L87 Difference]: Start difference. First operand 2983 states and 10463 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) [2021-06-05 16:35:16,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:16,570 INFO L93 Difference]: Finished difference Result 4805 states and 15497 transitions. [2021-06-05 16:35:16,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:35:16,571 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 [2021-06-05 16:35:16,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:16,578 INFO L225 Difference]: With dead ends: 4805 [2021-06-05 16:35:16,578 INFO L226 Difference]: Without dead ends: 4758 [2021-06-05 16:35:16,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 377.9ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:35:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4758 states. [2021-06-05 16:35:16,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4758 to 3157. [2021-06-05 16:35:16,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 3.5218631178707223) internal successors, (11115), 3156 states have internal predecessors, (11115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 11115 transitions. [2021-06-05 16:35:16,636 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 11115 transitions. Word has length 28 [2021-06-05 16:35:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:16,636 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 11115 transitions. [2021-06-05 16:35:16,636 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) [2021-06-05 16:35:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 11115 transitions. [2021-06-05 16:35:16,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:16,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:16,641 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:16,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4021 [2021-06-05 16:35:16,842 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:16,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:16,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1928077453, now seen corresponding path program 63 times [2021-06-05 16:35:16,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:16,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436155475] [2021-06-05 16:35:16,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:16,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:16,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436155475] [2021-06-05 16:35:16,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436155475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:16,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608490489] [2021-06-05 16:35:16,878 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 [2021-06-05 16:35:16,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:35:16,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:16,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:16,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:17,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608490489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:17,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:17,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:35:17,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129704243] [2021-06-05 16:35:17,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:35:17,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:17,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:35:17,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:35:17,001 INFO L87 Difference]: Start difference. First operand 3157 states and 11115 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) [2021-06-05 16:35:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:17,725 INFO L93 Difference]: Finished difference Result 5122 states and 16201 transitions. [2021-06-05 16:35:17,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:35:17,725 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 [2021-06-05 16:35:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:17,732 INFO L225 Difference]: With dead ends: 5122 [2021-06-05 16:35:17,732 INFO L226 Difference]: Without dead ends: 5096 [2021-06-05 16:35:17,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:35:17,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5096 states. [2021-06-05 16:35:17,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5096 to 3181. [2021-06-05 16:35:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3181 states, 3180 states have (on average 3.5276729559748428) internal successors, (11218), 3180 states have internal predecessors, (11218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3181 states to 3181 states and 11218 transitions. [2021-06-05 16:35:17,791 INFO L78 Accepts]: Start accepts. Automaton has 3181 states and 11218 transitions. Word has length 28 [2021-06-05 16:35:17,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:17,791 INFO L482 AbstractCegarLoop]: Abstraction has 3181 states and 11218 transitions. [2021-06-05 16:35:17,791 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) [2021-06-05 16:35:17,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3181 states and 11218 transitions. [2021-06-05 16:35:17,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:17,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:17,795 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:17,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-06-05 16:35:17,996 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:17,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1694477061, now seen corresponding path program 64 times [2021-06-05 16:35:17,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:17,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555632169] [2021-06-05 16:35:17,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:18,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:18,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555632169] [2021-06-05 16:35:18,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555632169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:18,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549269992] [2021-06-05 16:35:18,048 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 [2021-06-05 16:35:18,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:35:18,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:18,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:18,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:18,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549269992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:18,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:18,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:35:18,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459623652] [2021-06-05 16:35:18,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:35:18,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:18,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:35:18,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:35:18,175 INFO L87 Difference]: Start difference. First operand 3181 states and 11218 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) [2021-06-05 16:35:18,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:18,890 INFO L93 Difference]: Finished difference Result 5123 states and 16231 transitions. [2021-06-05 16:35:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:35:18,890 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 [2021-06-05 16:35:18,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:18,897 INFO L225 Difference]: With dead ends: 5123 [2021-06-05 16:35:18,898 INFO L226 Difference]: Without dead ends: 5117 [2021-06-05 16:35:18,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 459.0ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:35:18,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-06-05 16:35:18,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 3184. [2021-06-05 16:35:18,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3184 states, 3183 states have (on average 3.522148916116871) internal successors, (11211), 3183 states have internal predecessors, (11211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:18,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 11211 transitions. [2021-06-05 16:35:18,952 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 11211 transitions. Word has length 28 [2021-06-05 16:35:18,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:18,952 INFO L482 AbstractCegarLoop]: Abstraction has 3184 states and 11211 transitions. [2021-06-05 16:35:18,952 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) [2021-06-05 16:35:18,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 11211 transitions. [2021-06-05 16:35:18,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:18,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:18,956 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:19,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4023 [2021-06-05 16:35:19,173 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:19,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:19,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1551691313, now seen corresponding path program 65 times [2021-06-05 16:35:19,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:19,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856883225] [2021-06-05 16:35:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:19,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:19,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856883225] [2021-06-05 16:35:19,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856883225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:19,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454203783] [2021-06-05 16:35:19,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:35:19,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:35:19,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:19,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:19,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:19,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454203783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:19,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:19,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:35:19,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316362072] [2021-06-05 16:35:19,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:35:19,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:19,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:35:19,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:35:19,326 INFO L87 Difference]: Start difference. First operand 3184 states and 11211 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) [2021-06-05 16:35:19,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:19,869 INFO L93 Difference]: Finished difference Result 5875 states and 18946 transitions. [2021-06-05 16:35:19,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:35:19,870 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 [2021-06-05 16:35:19,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:19,878 INFO L225 Difference]: With dead ends: 5875 [2021-06-05 16:35:19,878 INFO L226 Difference]: Without dead ends: 5792 [2021-06-05 16:35:19,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:35:19,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5792 states. [2021-06-05 16:35:19,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5792 to 3343. [2021-06-05 16:35:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3343 states, 3342 states have (on average 3.5556552962298027) internal successors, (11883), 3342 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:19,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3343 states to 3343 states and 11883 transitions. [2021-06-05 16:35:19,940 INFO L78 Accepts]: Start accepts. Automaton has 3343 states and 11883 transitions. Word has length 28 [2021-06-05 16:35:19,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:19,940 INFO L482 AbstractCegarLoop]: Abstraction has 3343 states and 11883 transitions. [2021-06-05 16:35:19,940 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) [2021-06-05 16:35:19,940 INFO L276 IsEmpty]: Start isEmpty. Operand 3343 states and 11883 transitions. [2021-06-05 16:35:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:19,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:19,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:20,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-06-05 16:35:20,153 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:20,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:20,153 INFO L82 PathProgramCache]: Analyzing trace with hash -659497231, now seen corresponding path program 66 times [2021-06-05 16:35:20,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:20,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043177762] [2021-06-05 16:35:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:35:20,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:20,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043177762] [2021-06-05 16:35:20,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043177762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:20,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64598812] [2021-06-05 16:35:20,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:35:20,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:35:20,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:20,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:35:20,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:35:20,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64598812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:20,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:20,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:35:20,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42907474] [2021-06-05 16:35:20,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:35:20,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:20,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:35:20,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:35:20,260 INFO L87 Difference]: Start difference. First operand 3343 states and 11883 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) [2021-06-05 16:35:20,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:20,421 INFO L93 Difference]: Finished difference Result 4624 states and 15329 transitions. [2021-06-05 16:35:20,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:35:20,422 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 [2021-06-05 16:35:20,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:20,429 INFO L225 Difference]: With dead ends: 4624 [2021-06-05 16:35:20,429 INFO L226 Difference]: Without dead ends: 4624 [2021-06-05 16:35:20,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:35:20,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4624 states. [2021-06-05 16:35:20,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4624 to 3098. [2021-06-05 16:35:20,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3098 states, 3097 states have (on average 3.5298676138198255) internal successors, (10932), 3097 states have internal predecessors, (10932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:20,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3098 states to 3098 states and 10932 transitions. [2021-06-05 16:35:20,482 INFO L78 Accepts]: Start accepts. Automaton has 3098 states and 10932 transitions. Word has length 28 [2021-06-05 16:35:20,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:20,482 INFO L482 AbstractCegarLoop]: Abstraction has 3098 states and 10932 transitions. [2021-06-05 16:35:20,482 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) [2021-06-05 16:35:20,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3098 states and 10932 transitions. [2021-06-05 16:35:20,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:20,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:20,486 INFO L521 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] [2021-06-05 16:35:20,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:20,687 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:20,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:20,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2006178797, now seen corresponding path program 67 times [2021-06-05 16:35:20,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:20,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055829798] [2021-06-05 16:35:20,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:20,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:20,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055829798] [2021-06-05 16:35:20,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055829798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:20,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191320006] [2021-06-05 16:35:20,725 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 [2021-06-05 16:35:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:20,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:20,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:20,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191320006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:20,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:20,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:35:20,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821489334] [2021-06-05 16:35:20,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:35:20,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:20,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:35:20,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:35:20,824 INFO L87 Difference]: Start difference. First operand 3098 states and 10932 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) [2021-06-05 16:35:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:21,509 INFO L93 Difference]: Finished difference Result 6516 states and 20731 transitions. [2021-06-05 16:35:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:35:21,509 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 [2021-06-05 16:35:21,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:21,519 INFO L225 Difference]: With dead ends: 6516 [2021-06-05 16:35:21,519 INFO L226 Difference]: Without dead ends: 6516 [2021-06-05 16:35:21,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 388.3ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:35:21,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6516 states. [2021-06-05 16:35:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6516 to 3116. [2021-06-05 16:35:21,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3116 states, 3115 states have (on average 3.5296950240770464) internal successors, (10995), 3115 states have internal predecessors, (10995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:21,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3116 states to 3116 states and 10995 transitions. [2021-06-05 16:35:21,586 INFO L78 Accepts]: Start accepts. Automaton has 3116 states and 10995 transitions. Word has length 28 [2021-06-05 16:35:21,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:21,586 INFO L482 AbstractCegarLoop]: Abstraction has 3116 states and 10995 transitions. [2021-06-05 16:35:21,586 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) [2021-06-05 16:35:21,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3116 states and 10995 transitions. [2021-06-05 16:35:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:21,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:21,590 INFO L521 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] [2021-06-05 16:35:21,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4026,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:21,791 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:21,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:21,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1221264703, now seen corresponding path program 68 times [2021-06-05 16:35:21,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:21,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222325538] [2021-06-05 16:35:21,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:21,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:21,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222325538] [2021-06-05 16:35:21,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222325538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:21,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545932588] [2021-06-05 16:35:21,831 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 [2021-06-05 16:35:21,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:21,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:21,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:21,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:21,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545932588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:21,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:21,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:35:21,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335044140] [2021-06-05 16:35:21,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:35:21,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:21,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:35:21,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:35:21,932 INFO L87 Difference]: Start difference. First operand 3116 states and 10995 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) [2021-06-05 16:35:22,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:22,646 INFO L93 Difference]: Finished difference Result 6771 states and 21511 transitions. [2021-06-05 16:35:22,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:35:22,647 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 [2021-06-05 16:35:22,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:22,656 INFO L225 Difference]: With dead ends: 6771 [2021-06-05 16:35:22,656 INFO L226 Difference]: Without dead ends: 6771 [2021-06-05 16:35:22,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:35:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6771 states. [2021-06-05 16:35:22,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6771 to 3210. [2021-06-05 16:35:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 3209 states have (on average 3.5219694608912433) internal successors, (11302), 3209 states have internal predecessors, (11302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 11302 transitions. [2021-06-05 16:35:22,726 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 11302 transitions. Word has length 28 [2021-06-05 16:35:22,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:22,726 INFO L482 AbstractCegarLoop]: Abstraction has 3210 states and 11302 transitions. [2021-06-05 16:35:22,726 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) [2021-06-05 16:35:22,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 11302 transitions. [2021-06-05 16:35:22,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:22,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:22,730 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:22,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4027 [2021-06-05 16:35:22,931 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:22,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:22,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1990679937, now seen corresponding path program 69 times [2021-06-05 16:35:22,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:22,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967869712] [2021-06-05 16:35:22,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:22,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:22,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967869712] [2021-06-05 16:35:22,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967869712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:22,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132382895] [2021-06-05 16:35:22,963 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 [2021-06-05 16:35:22,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:35:22,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:22,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:22,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:23,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132382895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:23,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:23,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:35:23,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170914390] [2021-06-05 16:35:23,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:35:23,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:23,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:35:23,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:35:23,104 INFO L87 Difference]: Start difference. First operand 3210 states and 11302 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) [2021-06-05 16:35:23,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:23,721 INFO L93 Difference]: Finished difference Result 6952 states and 22145 transitions. [2021-06-05 16:35:23,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:35:23,722 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 [2021-06-05 16:35:23,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:23,731 INFO L225 Difference]: With dead ends: 6952 [2021-06-05 16:35:23,731 INFO L226 Difference]: Without dead ends: 6916 [2021-06-05 16:35:23,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 378.1ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:35:23,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6916 states. [2021-06-05 16:35:23,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6916 to 3597. [2021-06-05 16:35:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3597 states, 3596 states have (on average 3.5489432703003336) internal successors, (12762), 3596 states have internal predecessors, (12762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:23,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 12762 transitions. [2021-06-05 16:35:23,802 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 12762 transitions. Word has length 28 [2021-06-05 16:35:23,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:23,802 INFO L482 AbstractCegarLoop]: Abstraction has 3597 states and 12762 transitions. [2021-06-05 16:35:23,803 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) [2021-06-05 16:35:23,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 12762 transitions. [2021-06-05 16:35:23,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:23,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:23,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:24,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4028,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:24,007 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:24,008 INFO L82 PathProgramCache]: Analyzing trace with hash -833209241, now seen corresponding path program 70 times [2021-06-05 16:35:24,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:24,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719404222] [2021-06-05 16:35:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:24,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:24,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719404222] [2021-06-05 16:35:24,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719404222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:24,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001265743] [2021-06-05 16:35:24,054 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 [2021-06-05 16:35:24,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:35:24,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:24,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:24,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:24,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001265743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:24,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:24,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:35:24,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632088594] [2021-06-05 16:35:24,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:35:24,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:24,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:35:24,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:35:24,149 INFO L87 Difference]: Start difference. First operand 3597 states and 12762 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) [2021-06-05 16:35:24,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:24,728 INFO L93 Difference]: Finished difference Result 7145 states and 22690 transitions. [2021-06-05 16:35:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:35:24,729 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 [2021-06-05 16:35:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:24,739 INFO L225 Difference]: With dead ends: 7145 [2021-06-05 16:35:24,739 INFO L226 Difference]: Without dead ends: 7145 [2021-06-05 16:35:24,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 360.2ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:35:24,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7145 states. [2021-06-05 16:35:24,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7145 to 3308. [2021-06-05 16:35:24,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3308 states, 3307 states have (on average 3.5119443604475356) internal successors, (11614), 3307 states have internal predecessors, (11614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:24,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3308 states to 3308 states and 11614 transitions. [2021-06-05 16:35:24,828 INFO L78 Accepts]: Start accepts. Automaton has 3308 states and 11614 transitions. Word has length 28 [2021-06-05 16:35:24,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:24,829 INFO L482 AbstractCegarLoop]: Abstraction has 3308 states and 11614 transitions. [2021-06-05 16:35:24,829 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) [2021-06-05 16:35:24,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3308 states and 11614 transitions. [2021-06-05 16:35:24,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:24,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:24,833 INFO L521 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] [2021-06-05 16:35:25,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4029,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:25,033 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:25,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:25,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1266085845, now seen corresponding path program 71 times [2021-06-05 16:35:25,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:25,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286360233] [2021-06-05 16:35:25,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:25,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:25,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286360233] [2021-06-05 16:35:25,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286360233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:25,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472088671] [2021-06-05 16:35:25,068 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 [2021-06-05 16:35:25,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:35:25,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:25,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:25,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:25,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472088671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:25,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:25,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:35:25,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618437629] [2021-06-05 16:35:25,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:35:25,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:25,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:35:25,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:35:25,161 INFO L87 Difference]: Start difference. First operand 3308 states and 11614 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) [2021-06-05 16:35:25,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:25,812 INFO L93 Difference]: Finished difference Result 6241 states and 20184 transitions. [2021-06-05 16:35:25,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:35:25,813 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 [2021-06-05 16:35:25,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:25,823 INFO L225 Difference]: With dead ends: 6241 [2021-06-05 16:35:25,823 INFO L226 Difference]: Without dead ends: 6237 [2021-06-05 16:35:25,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:35:25,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2021-06-05 16:35:25,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 3068. [2021-06-05 16:35:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 3067 states have (on average 3.53635474404956) internal successors, (10846), 3067 states have internal predecessors, (10846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:25,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 10846 transitions. [2021-06-05 16:35:25,883 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 10846 transitions. Word has length 28 [2021-06-05 16:35:25,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:25,884 INFO L482 AbstractCegarLoop]: Abstraction has 3068 states and 10846 transitions. [2021-06-05 16:35:25,884 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) [2021-06-05 16:35:25,884 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 10846 transitions. [2021-06-05 16:35:25,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:25,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:25,887 INFO L521 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] [2021-06-05 16:35:26,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4030 [2021-06-05 16:35:26,088 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:26,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:26,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1538095035, now seen corresponding path program 72 times [2021-06-05 16:35:26,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:26,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463324971] [2021-06-05 16:35:26,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:26,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:26,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463324971] [2021-06-05 16:35:26,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463324971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:26,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425760370] [2021-06-05 16:35:26,124 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 [2021-06-05 16:35:26,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:35:26,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:26,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:26,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:26,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425760370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:26,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:26,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:35:26,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231796069] [2021-06-05 16:35:26,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:35:26,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:26,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:35:26,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:35:26,243 INFO L87 Difference]: Start difference. First operand 3068 states and 10846 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) [2021-06-05 16:35:27,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:27,322 INFO L93 Difference]: Finished difference Result 9481 states and 30975 transitions. [2021-06-05 16:35:27,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:35:27,322 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 [2021-06-05 16:35:27,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:27,338 INFO L225 Difference]: With dead ends: 9481 [2021-06-05 16:35:27,338 INFO L226 Difference]: Without dead ends: 9481 [2021-06-05 16:35:27,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 632.7ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:35:27,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9481 states. [2021-06-05 16:35:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9481 to 3244. [2021-06-05 16:35:27,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3244 states, 3243 states have (on average 3.602836879432624) internal successors, (11684), 3243 states have internal predecessors, (11684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:27,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3244 states to 3244 states and 11684 transitions. [2021-06-05 16:35:27,444 INFO L78 Accepts]: Start accepts. Automaton has 3244 states and 11684 transitions. Word has length 28 [2021-06-05 16:35:27,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:27,444 INFO L482 AbstractCegarLoop]: Abstraction has 3244 states and 11684 transitions. [2021-06-05 16:35:27,444 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) [2021-06-05 16:35:27,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3244 states and 11684 transitions. [2021-06-05 16:35:27,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:27,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:27,449 INFO L521 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] [2021-06-05 16:35:27,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4031 [2021-06-05 16:35:27,649 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:27,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:27,649 INFO L82 PathProgramCache]: Analyzing trace with hash -971142955, now seen corresponding path program 73 times [2021-06-05 16:35:27,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:27,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421035436] [2021-06-05 16:35:27,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:27,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:27,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421035436] [2021-06-05 16:35:27,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421035436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:27,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312322654] [2021-06-05 16:35:27,683 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 [2021-06-05 16:35:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:27,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:27,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:27,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312322654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:27,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:27,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:35:27,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107101684] [2021-06-05 16:35:27,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:35:27,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:27,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:35:27,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:35:27,800 INFO L87 Difference]: Start difference. First operand 3244 states and 11684 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) [2021-06-05 16:35:28,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:28,821 INFO L93 Difference]: Finished difference Result 9310 states and 30510 transitions. [2021-06-05 16:35:28,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:35:28,822 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 [2021-06-05 16:35:28,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:28,837 INFO L225 Difference]: With dead ends: 9310 [2021-06-05 16:35:28,837 INFO L226 Difference]: Without dead ends: 9310 [2021-06-05 16:35:28,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 601.3ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:35:28,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9310 states. [2021-06-05 16:35:28,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9310 to 3216. [2021-06-05 16:35:28,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 3.5878693623639193) internal successors, (11535), 3215 states have internal predecessors, (11535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 11535 transitions. [2021-06-05 16:35:28,963 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 11535 transitions. Word has length 28 [2021-06-05 16:35:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:28,963 INFO L482 AbstractCegarLoop]: Abstraction has 3216 states and 11535 transitions. [2021-06-05 16:35:28,963 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) [2021-06-05 16:35:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 11535 transitions. [2021-06-05 16:35:28,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:28,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:28,968 INFO L521 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] [2021-06-05 16:35:29,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4032 [2021-06-05 16:35:29,168 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:29,168 INFO L82 PathProgramCache]: Analyzing trace with hash -2143488813, now seen corresponding path program 74 times [2021-06-05 16:35:29,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:29,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100046953] [2021-06-05 16:35:29,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:29,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:29,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100046953] [2021-06-05 16:35:29,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100046953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:29,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715699313] [2021-06-05 16:35:29,209 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 [2021-06-05 16:35:29,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:29,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:29,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:29,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:29,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715699313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:29,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:29,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:35:29,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263873526] [2021-06-05 16:35:29,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:29,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:29,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:29,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:29,334 INFO L87 Difference]: Start difference. First operand 3216 states and 11535 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) [2021-06-05 16:35:30,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:30,281 INFO L93 Difference]: Finished difference Result 8753 states and 27774 transitions. [2021-06-05 16:35:30,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 16:35:30,282 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 [2021-06-05 16:35:30,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:30,295 INFO L225 Difference]: With dead ends: 8753 [2021-06-05 16:35:30,295 INFO L226 Difference]: Without dead ends: 8753 [2021-06-05 16:35:30,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 507.8ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:35:30,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8753 states. [2021-06-05 16:35:30,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8753 to 3236. [2021-06-05 16:35:30,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 3235 states have (on average 3.591035548686244) internal successors, (11617), 3235 states have internal predecessors, (11617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:30,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 11617 transitions. [2021-06-05 16:35:30,377 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 11617 transitions. Word has length 28 [2021-06-05 16:35:30,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:30,378 INFO L482 AbstractCegarLoop]: Abstraction has 3236 states and 11617 transitions. [2021-06-05 16:35:30,378 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) [2021-06-05 16:35:30,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 11617 transitions. [2021-06-05 16:35:30,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:30,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:30,382 INFO L521 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] [2021-06-05 16:35:30,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4033 [2021-06-05 16:35:30,582 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:30,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:30,582 INFO L82 PathProgramCache]: Analyzing trace with hash -2062112725, now seen corresponding path program 75 times [2021-06-05 16:35:30,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:30,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190100318] [2021-06-05 16:35:30,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:30,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:30,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190100318] [2021-06-05 16:35:30,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190100318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:30,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822946976] [2021-06-05 16:35:30,618 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 [2021-06-05 16:35:30,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:35:30,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:30,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:30,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:30,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822946976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:30,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:30,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:35:30,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765735298] [2021-06-05 16:35:30,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:30,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:30,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:30,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:30,720 INFO L87 Difference]: Start difference. First operand 3236 states and 11617 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) [2021-06-05 16:35:31,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:31,601 INFO L93 Difference]: Finished difference Result 8265 states and 26591 transitions. [2021-06-05 16:35:31,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:35:31,601 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 [2021-06-05 16:35:31,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:31,613 INFO L225 Difference]: With dead ends: 8265 [2021-06-05 16:35:31,613 INFO L226 Difference]: Without dead ends: 8257 [2021-06-05 16:35:31,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 491.5ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:35:31,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8257 states. [2021-06-05 16:35:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8257 to 3218. [2021-06-05 16:35:31,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3217 states have (on average 3.5871930369909855) internal successors, (11540), 3217 states have internal predecessors, (11540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 11540 transitions. [2021-06-05 16:35:31,692 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 11540 transitions. Word has length 28 [2021-06-05 16:35:31,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:31,692 INFO L482 AbstractCegarLoop]: Abstraction has 3218 states and 11540 transitions. [2021-06-05 16:35:31,692 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) [2021-06-05 16:35:31,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 11540 transitions. [2021-06-05 16:35:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:31,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:31,696 INFO L521 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] [2021-06-05 16:35:31,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4034 [2021-06-05 16:35:31,897 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:31,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:31,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1131455509, now seen corresponding path program 76 times [2021-06-05 16:35:31,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:31,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99246256] [2021-06-05 16:35:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:31,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:31,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99246256] [2021-06-05 16:35:31,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99246256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:31,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341710546] [2021-06-05 16:35:31,931 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 [2021-06-05 16:35:31,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:35:31,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:31,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:31,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:32,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341710546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:32,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:32,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:35:32,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821295035] [2021-06-05 16:35:32,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:35:32,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:32,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:35:32,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:35:32,048 INFO L87 Difference]: Start difference. First operand 3218 states and 11540 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) [2021-06-05 16:35:32,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:32,990 INFO L93 Difference]: Finished difference Result 8190 states and 26354 transitions. [2021-06-05 16:35:32,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 16:35:32,990 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 [2021-06-05 16:35:32,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:33,002 INFO L225 Difference]: With dead ends: 8190 [2021-06-05 16:35:33,002 INFO L226 Difference]: Without dead ends: 8190 [2021-06-05 16:35:33,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 530.9ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:35:33,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8190 states. [2021-06-05 16:35:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8190 to 3234. [2021-06-05 16:35:33,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3233 states have (on average 3.589236003711723) internal successors, (11604), 3233 states have internal predecessors, (11604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 11604 transitions. [2021-06-05 16:35:33,079 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 11604 transitions. Word has length 28 [2021-06-05 16:35:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:33,079 INFO L482 AbstractCegarLoop]: Abstraction has 3234 states and 11604 transitions. [2021-06-05 16:35:33,079 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) [2021-06-05 16:35:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 11604 transitions. [2021-06-05 16:35:33,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:33,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:33,083 INFO L521 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] [2021-06-05 16:35:33,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4035 [2021-06-05 16:35:33,283 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:33,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:33,283 INFO L82 PathProgramCache]: Analyzing trace with hash 511583645, now seen corresponding path program 77 times [2021-06-05 16:35:33,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:33,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485531560] [2021-06-05 16:35:33,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:33,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:33,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485531560] [2021-06-05 16:35:33,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485531560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:33,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755133292] [2021-06-05 16:35:33,317 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 [2021-06-05 16:35:33,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:35:33,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:33,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:33,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:33,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755133292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:33,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:33,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:35:33,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761780966] [2021-06-05 16:35:33,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:35:33,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:33,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:35:33,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:35:33,428 INFO L87 Difference]: Start difference. First operand 3234 states and 11604 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) [2021-06-05 16:35:34,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:34,334 INFO L93 Difference]: Finished difference Result 7851 states and 25552 transitions. [2021-06-05 16:35:34,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:35:34,334 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 [2021-06-05 16:35:34,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:34,346 INFO L225 Difference]: With dead ends: 7851 [2021-06-05 16:35:34,346 INFO L226 Difference]: Without dead ends: 7843 [2021-06-05 16:35:34,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 518.4ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:35:34,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7843 states. [2021-06-05 16:35:34,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7843 to 2991. [2021-06-05 16:35:34,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.5123745819397993) internal successors, (10502), 2990 states have internal predecessors, (10502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 10502 transitions. [2021-06-05 16:35:34,417 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 10502 transitions. Word has length 28 [2021-06-05 16:35:34,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:34,417 INFO L482 AbstractCegarLoop]: Abstraction has 2991 states and 10502 transitions. [2021-06-05 16:35:34,417 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) [2021-06-05 16:35:34,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 10502 transitions. [2021-06-05 16:35:34,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:34,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:34,420 INFO L521 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] [2021-06-05 16:35:34,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:34,621 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:34,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:34,621 INFO L82 PathProgramCache]: Analyzing trace with hash 594987225, now seen corresponding path program 78 times [2021-06-05 16:35:34,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:34,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046160143] [2021-06-05 16:35:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:34,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:34,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046160143] [2021-06-05 16:35:34,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046160143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:34,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010720112] [2021-06-05 16:35:34,656 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 [2021-06-05 16:35:34,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:35:34,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:34,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:34,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:34,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010720112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:34,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:34,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:35:34,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169134597] [2021-06-05 16:35:34,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:35:34,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:34,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:35:34,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:35:34,776 INFO L87 Difference]: Start difference. First operand 2991 states and 10502 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) [2021-06-05 16:35:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:35,627 INFO L93 Difference]: Finished difference Result 6061 states and 19474 transitions. [2021-06-05 16:35:35,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:35:35,628 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 [2021-06-05 16:35:35,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:35,636 INFO L225 Difference]: With dead ends: 6061 [2021-06-05 16:35:35,637 INFO L226 Difference]: Without dead ends: 6061 [2021-06-05 16:35:35,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 517.4ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:35:35,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-05 16:35:35,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 3003. [2021-06-05 16:35:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 3.5109926715522985) internal successors, (10540), 3002 states have internal predecessors, (10540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 10540 transitions. [2021-06-05 16:35:35,693 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 10540 transitions. Word has length 28 [2021-06-05 16:35:35,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:35,693 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 10540 transitions. [2021-06-05 16:35:35,693 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) [2021-06-05 16:35:35,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 10540 transitions. [2021-06-05 16:35:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:35,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:35,697 INFO L521 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] [2021-06-05 16:35:35,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4037,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:35,897 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:35,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:35,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2046619895, now seen corresponding path program 79 times [2021-06-05 16:35:35,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:35,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612676790] [2021-06-05 16:35:35,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:35,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:35,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:35,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612676790] [2021-06-05 16:35:35,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612676790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:35,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976940348] [2021-06-05 16:35:35,938 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 [2021-06-05 16:35:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:35,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:35,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:36,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976940348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:36,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:36,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:35:36,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186011047] [2021-06-05 16:35:36,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:35:36,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:36,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:35:36,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:35:36,089 INFO L87 Difference]: Start difference. First operand 3003 states and 10540 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) [2021-06-05 16:35:37,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:37,169 INFO L93 Difference]: Finished difference Result 6857 states and 21507 transitions. [2021-06-05 16:35:37,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:35:37,169 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 [2021-06-05 16:35:37,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:37,179 INFO L225 Difference]: With dead ends: 6857 [2021-06-05 16:35:37,179 INFO L226 Difference]: Without dead ends: 6857 [2021-06-05 16:35:37,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 708.6ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:35:37,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6857 states. [2021-06-05 16:35:37,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6857 to 3069. [2021-06-05 16:35:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3069 states, 3068 states have (on average 3.50619295958279) internal successors, (10757), 3068 states have internal predecessors, (10757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:37,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 10757 transitions. [2021-06-05 16:35:37,245 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 10757 transitions. Word has length 28 [2021-06-05 16:35:37,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:37,245 INFO L482 AbstractCegarLoop]: Abstraction has 3069 states and 10757 transitions. [2021-06-05 16:35:37,245 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) [2021-06-05 16:35:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 10757 transitions. [2021-06-05 16:35:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:37,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:37,249 INFO L521 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] [2021-06-05 16:35:37,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4038,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:37,453 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:37,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:37,453 INFO L82 PathProgramCache]: Analyzing trace with hash -403580741, now seen corresponding path program 80 times [2021-06-05 16:35:37,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:37,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792876537] [2021-06-05 16:35:37,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:37,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:37,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792876537] [2021-06-05 16:35:37,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792876537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:37,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549980372] [2021-06-05 16:35:37,488 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 [2021-06-05 16:35:37,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:37,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:37,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:37,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:37,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549980372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:37,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:37,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:35:37,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022624604] [2021-06-05 16:35:37,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:35:37,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:37,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:35:37,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:35:37,612 INFO L87 Difference]: Start difference. First operand 3069 states and 10757 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) [2021-06-05 16:35:38,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:38,626 INFO L93 Difference]: Finished difference Result 6397 states and 20307 transitions. [2021-06-05 16:35:38,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:35:38,627 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 [2021-06-05 16:35:38,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:38,636 INFO L225 Difference]: With dead ends: 6397 [2021-06-05 16:35:38,636 INFO L226 Difference]: Without dead ends: 6393 [2021-06-05 16:35:38,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 607.3ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:35:38,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6393 states. [2021-06-05 16:35:38,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6393 to 2995. [2021-06-05 16:35:38,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2995 states, 2994 states have (on average 3.502672010688043) internal successors, (10487), 2994 states have internal predecessors, (10487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2995 states to 2995 states and 10487 transitions. [2021-06-05 16:35:38,698 INFO L78 Accepts]: Start accepts. Automaton has 2995 states and 10487 transitions. Word has length 28 [2021-06-05 16:35:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:38,698 INFO L482 AbstractCegarLoop]: Abstraction has 2995 states and 10487 transitions. [2021-06-05 16:35:38,698 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) [2021-06-05 16:35:38,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2995 states and 10487 transitions. [2021-06-05 16:35:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:38,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:38,702 INFO L521 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] [2021-06-05 16:35:38,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4039 [2021-06-05 16:35:38,902 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:38,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:38,902 INFO L82 PathProgramCache]: Analyzing trace with hash 175862483, now seen corresponding path program 65 times [2021-06-05 16:35:38,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:38,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916214759] [2021-06-05 16:35:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:38,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:38,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916214759] [2021-06-05 16:35:38,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916214759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:38,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302569035] [2021-06-05 16:35:38,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:38,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:35:38,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:38,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:38,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:39,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302569035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:39,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:39,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:35:39,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25957103] [2021-06-05 16:35:39,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:39,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:39,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:39,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:39,042 INFO L87 Difference]: Start difference. First operand 2995 states and 10487 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) [2021-06-05 16:35:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:39,591 INFO L93 Difference]: Finished difference Result 5524 states and 17848 transitions. [2021-06-05 16:35:39,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:35:39,591 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 [2021-06-05 16:35:39,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:39,599 INFO L225 Difference]: With dead ends: 5524 [2021-06-05 16:35:39,599 INFO L226 Difference]: Without dead ends: 5524 [2021-06-05 16:35:39,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:35:39,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5524 states. [2021-06-05 16:35:39,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5524 to 2995. [2021-06-05 16:35:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2995 states, 2994 states have (on average 3.5046760187040746) internal successors, (10493), 2994 states have internal predecessors, (10493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:39,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2995 states to 2995 states and 10493 transitions. [2021-06-05 16:35:39,650 INFO L78 Accepts]: Start accepts. Automaton has 2995 states and 10493 transitions. Word has length 28 [2021-06-05 16:35:39,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:39,650 INFO L482 AbstractCegarLoop]: Abstraction has 2995 states and 10493 transitions. [2021-06-05 16:35:39,650 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) [2021-06-05 16:35:39,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2995 states and 10493 transitions. [2021-06-05 16:35:39,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:39,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:39,653 INFO L521 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] [2021-06-05 16:35:39,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4040,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:39,854 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:39,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:39,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1435937279, now seen corresponding path program 66 times [2021-06-05 16:35:39,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:39,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338307086] [2021-06-05 16:35:39,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:39,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:39,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338307086] [2021-06-05 16:35:39,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338307086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:39,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731877496] [2021-06-05 16:35:39,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:35:39,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:35:39,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:39,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:39,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:39,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731877496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:39,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:39,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:35:39,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927514640] [2021-06-05 16:35:39,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:39,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:39,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:39,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:39,996 INFO L87 Difference]: Start difference. First operand 2995 states and 10493 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) [2021-06-05 16:35:40,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:40,759 INFO L93 Difference]: Finished difference Result 5876 states and 18839 transitions. [2021-06-05 16:35:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:35:40,759 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 [2021-06-05 16:35:40,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:40,790 INFO L225 Difference]: With dead ends: 5876 [2021-06-05 16:35:40,790 INFO L226 Difference]: Without dead ends: 5876 [2021-06-05 16:35:40,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 436.6ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:35:40,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5876 states. [2021-06-05 16:35:40,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5876 to 2986. [2021-06-05 16:35:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 3.504857621440536) internal successors, (10462), 2985 states have internal predecessors, (10462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 10462 transitions. [2021-06-05 16:35:40,839 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 10462 transitions. Word has length 28 [2021-06-05 16:35:40,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:40,839 INFO L482 AbstractCegarLoop]: Abstraction has 2986 states and 10462 transitions. [2021-06-05 16:35:40,839 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) [2021-06-05 16:35:40,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 10462 transitions. [2021-06-05 16:35:40,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:40,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:40,843 INFO L521 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] [2021-06-05 16:35:41,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4041 [2021-06-05 16:35:41,043 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:41,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:41,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1667476927, now seen corresponding path program 67 times [2021-06-05 16:35:41,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:41,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006379762] [2021-06-05 16:35:41,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:41,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:41,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006379762] [2021-06-05 16:35:41,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006379762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:41,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738799688] [2021-06-05 16:35:41,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:41,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:41,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:41,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738799688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:41,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:41,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:35:41,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080607146] [2021-06-05 16:35:41,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:41,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:41,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:41,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:41,180 INFO L87 Difference]: Start difference. First operand 2986 states and 10462 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) [2021-06-05 16:35:41,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:41,991 INFO L93 Difference]: Finished difference Result 6350 states and 20120 transitions. [2021-06-05 16:35:41,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 16:35:41,992 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 [2021-06-05 16:35:41,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:42,000 INFO L225 Difference]: With dead ends: 6350 [2021-06-05 16:35:42,001 INFO L226 Difference]: Without dead ends: 6350 [2021-06-05 16:35:42,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 492.7ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:35:42,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6350 states. [2021-06-05 16:35:42,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6350 to 3046. [2021-06-05 16:35:42,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 3.5008210180623975) internal successors, (10660), 3045 states have internal predecessors, (10660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:42,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 10660 transitions. [2021-06-05 16:35:42,059 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 10660 transitions. Word has length 28 [2021-06-05 16:35:42,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:42,059 INFO L482 AbstractCegarLoop]: Abstraction has 3046 states and 10660 transitions. [2021-06-05 16:35:42,059 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) [2021-06-05 16:35:42,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 10660 transitions. [2021-06-05 16:35:42,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:42,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:42,062 INFO L521 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] [2021-06-05 16:35:42,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4042,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:42,263 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:42,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1647761113, now seen corresponding path program 68 times [2021-06-05 16:35:42,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:42,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994061434] [2021-06-05 16:35:42,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:42,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:42,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994061434] [2021-06-05 16:35:42,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994061434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:42,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639487166] [2021-06-05 16:35:42,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:42,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:42,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:42,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:42,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:42,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639487166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:42,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:42,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 16:35:42,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415525949] [2021-06-05 16:35:42,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:35:42,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:42,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:35:42,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:35:42,418 INFO L87 Difference]: Start difference. First operand 3046 states and 10660 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) [2021-06-05 16:35:42,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:42,949 INFO L93 Difference]: Finished difference Result 7170 states and 24220 transitions. [2021-06-05 16:35:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:35:42,950 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 [2021-06-05 16:35:42,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:42,960 INFO L225 Difference]: With dead ends: 7170 [2021-06-05 16:35:42,961 INFO L226 Difference]: Without dead ends: 7170 [2021-06-05 16:35:42,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 370.4ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:35:42,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7170 states. [2021-06-05 16:35:43,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7170 to 4145. [2021-06-05 16:35:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 4144 states have (on average 3.618484555984556) internal successors, (14995), 4144 states have internal predecessors, (14995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 14995 transitions. [2021-06-05 16:35:43,054 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 14995 transitions. Word has length 28 [2021-06-05 16:35:43,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:43,054 INFO L482 AbstractCegarLoop]: Abstraction has 4145 states and 14995 transitions. [2021-06-05 16:35:43,054 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) [2021-06-05 16:35:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 14995 transitions. [2021-06-05 16:35:43,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:43,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:43,059 INFO L521 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] [2021-06-05 16:35:43,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4043 [2021-06-05 16:35:43,260 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:43,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:43,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1712298069, now seen corresponding path program 69 times [2021-06-05 16:35:43,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:43,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208886742] [2021-06-05 16:35:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:43,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:43,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208886742] [2021-06-05 16:35:43,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208886742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:43,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573946921] [2021-06-05 16:35:43,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:43,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:35:43,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:43,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:43,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:43,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573946921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:43,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:43,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:35:43,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079479827] [2021-06-05 16:35:43,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:43,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:43,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:43,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:43,417 INFO L87 Difference]: Start difference. First operand 4145 states and 14995 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) [2021-06-05 16:35:44,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:44,225 INFO L93 Difference]: Finished difference Result 7513 states and 25430 transitions. [2021-06-05 16:35:44,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:35:44,226 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 [2021-06-05 16:35:44,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:44,238 INFO L225 Difference]: With dead ends: 7513 [2021-06-05 16:35:44,238 INFO L226 Difference]: Without dead ends: 7509 [2021-06-05 16:35:44,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 463.7ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:35:44,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7509 states. [2021-06-05 16:35:44,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7509 to 4037. [2021-06-05 16:35:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4037 states, 4036 states have (on average 3.627601585728444) internal successors, (14641), 4036 states have internal predecessors, (14641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:44,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4037 states to 4037 states and 14641 transitions. [2021-06-05 16:35:44,317 INFO L78 Accepts]: Start accepts. Automaton has 4037 states and 14641 transitions. Word has length 28 [2021-06-05 16:35:44,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:44,317 INFO L482 AbstractCegarLoop]: Abstraction has 4037 states and 14641 transitions. [2021-06-05 16:35:44,317 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) [2021-06-05 16:35:44,317 INFO L276 IsEmpty]: Start isEmpty. Operand 4037 states and 14641 transitions. [2021-06-05 16:35:44,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:44,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:44,322 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:44,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4044 [2021-06-05 16:35:44,523 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:44,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:44,523 INFO L82 PathProgramCache]: Analyzing trace with hash 307959399, now seen corresponding path program 81 times [2021-06-05 16:35:44,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:44,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840733824] [2021-06-05 16:35:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:44,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:44,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840733824] [2021-06-05 16:35:44,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840733824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:44,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850750509] [2021-06-05 16:35:44,551 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 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 [2021-06-05 16:35:44,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:35:44,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:44,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:44,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:44,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850750509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:44,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:44,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:35:44,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216074278] [2021-06-05 16:35:44,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:44,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:44,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:44,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:44,660 INFO L87 Difference]: Start difference. First operand 4037 states and 14641 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) [2021-06-05 16:35:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:45,509 INFO L93 Difference]: Finished difference Result 8340 states and 27997 transitions. [2021-06-05 16:35:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:35:45,509 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 [2021-06-05 16:35:45,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:45,521 INFO L225 Difference]: With dead ends: 8340 [2021-06-05 16:35:45,522 INFO L226 Difference]: Without dead ends: 8331 [2021-06-05 16:35:45,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 472.0ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:35:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8331 states. [2021-06-05 16:35:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8331 to 4477. [2021-06-05 16:35:45,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 4476 states have (on average 3.7155942806076854) internal successors, (16631), 4476 states have internal predecessors, (16631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 16631 transitions. [2021-06-05 16:35:45,612 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 16631 transitions. Word has length 28 [2021-06-05 16:35:45,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:45,612 INFO L482 AbstractCegarLoop]: Abstraction has 4477 states and 16631 transitions. [2021-06-05 16:35:45,612 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) [2021-06-05 16:35:45,613 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 16631 transitions. [2021-06-05 16:35:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:45,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:45,618 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:45,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4045 [2021-06-05 16:35:45,819 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:45,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:45,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1945666497, now seen corresponding path program 82 times [2021-06-05 16:35:45,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:45,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407939596] [2021-06-05 16:35:45,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:45,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:45,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407939596] [2021-06-05 16:35:45,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407939596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:45,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009412613] [2021-06-05 16:35:45,854 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 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 [2021-06-05 16:35:45,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:35:45,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:45,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:45,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:45,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009412613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:45,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:45,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:35:45,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303041255] [2021-06-05 16:35:45,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:45,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:45,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:45,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:45,960 INFO L87 Difference]: Start difference. First operand 4477 states and 16631 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) [2021-06-05 16:35:46,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:46,727 INFO L93 Difference]: Finished difference Result 8630 states and 28901 transitions. [2021-06-05 16:35:46,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:35:46,728 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 [2021-06-05 16:35:46,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:46,740 INFO L225 Difference]: With dead ends: 8630 [2021-06-05 16:35:46,740 INFO L226 Difference]: Without dead ends: 8630 [2021-06-05 16:35:46,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 473.1ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:35:46,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8630 states. [2021-06-05 16:35:46,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8630 to 4491. [2021-06-05 16:35:46,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4491 states, 4490 states have (on average 3.7028953229398662) internal successors, (16626), 4490 states have internal predecessors, (16626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:46,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4491 states to 4491 states and 16626 transitions. [2021-06-05 16:35:46,836 INFO L78 Accepts]: Start accepts. Automaton has 4491 states and 16626 transitions. Word has length 28 [2021-06-05 16:35:46,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:46,836 INFO L482 AbstractCegarLoop]: Abstraction has 4491 states and 16626 transitions. [2021-06-05 16:35:46,836 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) [2021-06-05 16:35:46,836 INFO L276 IsEmpty]: Start isEmpty. Operand 4491 states and 16626 transitions. [2021-06-05 16:35:46,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:46,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:46,843 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:47,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4046 [2021-06-05 16:35:47,043 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:47,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1145894509, now seen corresponding path program 83 times [2021-06-05 16:35:47,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:47,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075539412] [2021-06-05 16:35:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:47,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:47,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075539412] [2021-06-05 16:35:47,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075539412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:47,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033624593] [2021-06-05 16:35:47,077 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 [2021-06-05 16:35:47,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:35:47,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:47,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:47,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:47,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033624593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:47,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:47,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:35:47,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582270004] [2021-06-05 16:35:47,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:35:47,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:47,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:35:47,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:35:47,163 INFO L87 Difference]: Start difference. First operand 4491 states and 16626 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) [2021-06-05 16:35:47,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:47,588 INFO L93 Difference]: Finished difference Result 8035 states and 28348 transitions. [2021-06-05 16:35:47,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:35:47,589 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 [2021-06-05 16:35:47,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:47,601 INFO L225 Difference]: With dead ends: 8035 [2021-06-05 16:35:47,601 INFO L226 Difference]: Without dead ends: 7938 [2021-06-05 16:35:47,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 246.3ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:35:47,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7938 states. [2021-06-05 16:35:47,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7938 to 5963. [2021-06-05 16:35:47,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5963 states, 5962 states have (on average 3.763837638376384) internal successors, (22440), 5962 states have internal predecessors, (22440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:47,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5963 states to 5963 states and 22440 transitions. [2021-06-05 16:35:47,701 INFO L78 Accepts]: Start accepts. Automaton has 5963 states and 22440 transitions. Word has length 28 [2021-06-05 16:35:47,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:47,701 INFO L482 AbstractCegarLoop]: Abstraction has 5963 states and 22440 transitions. [2021-06-05 16:35:47,701 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) [2021-06-05 16:35:47,701 INFO L276 IsEmpty]: Start isEmpty. Operand 5963 states and 22440 transitions. [2021-06-05 16:35:47,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:47,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:47,709 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:47,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4047,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:47,910 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:47,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:47,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1941057807, now seen corresponding path program 84 times [2021-06-05 16:35:47,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:47,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254479179] [2021-06-05 16:35:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:35:47,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:47,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254479179] [2021-06-05 16:35:47,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254479179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:47,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939822156] [2021-06-05 16:35:47,938 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 [2021-06-05 16:35:47,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:35:47,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:47,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:35:47,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:35:48,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939822156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:48,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:48,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 16:35:48,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788207901] [2021-06-05 16:35:48,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:35:48,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:48,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:35:48,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:35:48,015 INFO L87 Difference]: Start difference. First operand 5963 states and 22440 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) [2021-06-05 16:35:48,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:48,191 INFO L93 Difference]: Finished difference Result 8287 states and 29195 transitions. [2021-06-05 16:35:48,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:35:48,192 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 [2021-06-05 16:35:48,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:48,205 INFO L225 Difference]: With dead ends: 8287 [2021-06-05 16:35:48,206 INFO L226 Difference]: Without dead ends: 8287 [2021-06-05 16:35:48,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:35:48,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8287 states. [2021-06-05 16:35:48,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8287 to 6088. [2021-06-05 16:35:48,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6088 states, 6087 states have (on average 3.741416132741909) internal successors, (22774), 6087 states have internal predecessors, (22774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:48,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6088 states to 6088 states and 22774 transitions. [2021-06-05 16:35:48,315 INFO L78 Accepts]: Start accepts. Automaton has 6088 states and 22774 transitions. Word has length 28 [2021-06-05 16:35:48,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:48,316 INFO L482 AbstractCegarLoop]: Abstraction has 6088 states and 22774 transitions. [2021-06-05 16:35:48,316 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) [2021-06-05 16:35:48,316 INFO L276 IsEmpty]: Start isEmpty. Operand 6088 states and 22774 transitions. [2021-06-05 16:35:48,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:48,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:48,324 INFO L521 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] [2021-06-05 16:35:48,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:48,524 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:48,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1010858063, now seen corresponding path program 85 times [2021-06-05 16:35:48,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:48,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112363722] [2021-06-05 16:35:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:48,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:48,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112363722] [2021-06-05 16:35:48,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112363722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:48,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238622672] [2021-06-05 16:35:48,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:35:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:48,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:48,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:48,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238622672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:48,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:48,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:35:48,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131203092] [2021-06-05 16:35:48,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:35:48,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:48,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:35:48,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:35:48,652 INFO L87 Difference]: Start difference. First operand 6088 states and 22774 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) [2021-06-05 16:35:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:49,380 INFO L93 Difference]: Finished difference Result 12628 states and 43945 transitions. [2021-06-05 16:35:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:35:49,381 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 [2021-06-05 16:35:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:49,446 INFO L225 Difference]: With dead ends: 12628 [2021-06-05 16:35:49,446 INFO L226 Difference]: Without dead ends: 12628 [2021-06-05 16:35:49,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:35:49,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12628 states. [2021-06-05 16:35:49,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12628 to 6761. [2021-06-05 16:35:49,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6761 states, 6760 states have (on average 3.7547337278106507) internal successors, (25382), 6760 states have internal predecessors, (25382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:49,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6761 states to 6761 states and 25382 transitions. [2021-06-05 16:35:49,583 INFO L78 Accepts]: Start accepts. Automaton has 6761 states and 25382 transitions. Word has length 28 [2021-06-05 16:35:49,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:49,583 INFO L482 AbstractCegarLoop]: Abstraction has 6761 states and 25382 transitions. [2021-06-05 16:35:49,583 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) [2021-06-05 16:35:49,583 INFO L276 IsEmpty]: Start isEmpty. Operand 6761 states and 25382 transitions. [2021-06-05 16:35:49,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:49,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:49,593 INFO L521 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] [2021-06-05 16:35:49,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:49,794 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:49,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:49,794 INFO L82 PathProgramCache]: Analyzing trace with hash 891821389, now seen corresponding path program 86 times [2021-06-05 16:35:49,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:49,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938938161] [2021-06-05 16:35:49,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:49,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:49,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938938161] [2021-06-05 16:35:49,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938938161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:49,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799891564] [2021-06-05 16:35:49,837 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 [2021-06-05 16:35:49,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:49,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:49,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:49,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:49,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799891564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:49,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:49,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 16:35:49,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663048706] [2021-06-05 16:35:49,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:35:49,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:49,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:35:49,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:35:49,935 INFO L87 Difference]: Start difference. First operand 6761 states and 25382 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) [2021-06-05 16:35:50,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:50,584 INFO L93 Difference]: Finished difference Result 12791 states and 44537 transitions. [2021-06-05 16:35:50,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:35:50,585 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 [2021-06-05 16:35:50,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:50,609 INFO L225 Difference]: With dead ends: 12791 [2021-06-05 16:35:50,609 INFO L226 Difference]: Without dead ends: 12791 [2021-06-05 16:35:50,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 368.3ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:35:50,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12791 states. [2021-06-05 16:35:50,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12791 to 6999. [2021-06-05 16:35:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6999 states, 6998 states have (on average 3.734352672192055) internal successors, (26133), 6998 states have internal predecessors, (26133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:50,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6999 states to 6999 states and 26133 transitions. [2021-06-05 16:35:50,765 INFO L78 Accepts]: Start accepts. Automaton has 6999 states and 26133 transitions. Word has length 28 [2021-06-05 16:35:50,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:50,765 INFO L482 AbstractCegarLoop]: Abstraction has 6999 states and 26133 transitions. [2021-06-05 16:35:50,765 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) [2021-06-05 16:35:50,765 INFO L276 IsEmpty]: Start isEmpty. Operand 6999 states and 26133 transitions. [2021-06-05 16:35:50,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:50,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:50,775 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:50,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4050,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:50,975 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:50,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:50,975 INFO L82 PathProgramCache]: Analyzing trace with hash -191201267, now seen corresponding path program 87 times [2021-06-05 16:35:50,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:50,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933821487] [2021-06-05 16:35:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:51,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:51,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933821487] [2021-06-05 16:35:51,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933821487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:51,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023436341] [2021-06-05 16:35:51,002 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 [2021-06-05 16:35:51,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:35:51,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:51,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:35:51,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:51,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023436341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:51,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:51,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 16:35:51,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611883343] [2021-06-05 16:35:51,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:35:51,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:51,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:35:51,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:35:51,125 INFO L87 Difference]: Start difference. First operand 6999 states and 26133 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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) [2021-06-05 16:35:51,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:51,904 INFO L93 Difference]: Finished difference Result 9904 states and 35142 transitions. [2021-06-05 16:35:51,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:35:51,905 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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 [2021-06-05 16:35:51,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:51,922 INFO L225 Difference]: With dead ends: 9904 [2021-06-05 16:35:51,922 INFO L226 Difference]: Without dead ends: 9816 [2021-06-05 16:35:51,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 509.2ms TimeCoverageRelationStatistics Valid=534, Invalid=1916, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:35:51,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9816 states. [2021-06-05 16:35:52,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9816 to 7496. [2021-06-05 16:35:52,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7496 states, 7495 states have (on average 3.741160773849233) internal successors, (28040), 7495 states have internal predecessors, (28040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7496 states to 7496 states and 28040 transitions. [2021-06-05 16:35:52,055 INFO L78 Accepts]: Start accepts. Automaton has 7496 states and 28040 transitions. Word has length 28 [2021-06-05 16:35:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:52,055 INFO L482 AbstractCegarLoop]: Abstraction has 7496 states and 28040 transitions. [2021-06-05 16:35:52,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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) [2021-06-05 16:35:52,055 INFO L276 IsEmpty]: Start isEmpty. Operand 7496 states and 28040 transitions. [2021-06-05 16:35:52,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:52,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:52,066 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:52,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4051 [2021-06-05 16:35:52,267 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:52,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:52,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1279876851, now seen corresponding path program 88 times [2021-06-05 16:35:52,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:52,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653978508] [2021-06-05 16:35:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:35:52,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:52,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653978508] [2021-06-05 16:35:52,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653978508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:52,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48673429] [2021-06-05 16:35:52,302 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 [2021-06-05 16:35:52,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:35:52,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:52,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:52,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:35:52,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48673429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:52,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:52,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:35:52,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632187103] [2021-06-05 16:35:52,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:35:52,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:52,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:35:52,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:35:52,390 INFO L87 Difference]: Start difference. First operand 7496 states and 28040 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) [2021-06-05 16:35:52,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:52,722 INFO L93 Difference]: Finished difference Result 11192 states and 39947 transitions. [2021-06-05 16:35:52,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:35:52,723 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 [2021-06-05 16:35:52,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:52,742 INFO L225 Difference]: With dead ends: 11192 [2021-06-05 16:35:52,742 INFO L226 Difference]: Without dead ends: 11192 [2021-06-05 16:35:52,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:35:52,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11192 states. [2021-06-05 16:35:52,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11192 to 8528. [2021-06-05 16:35:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8528 states, 8527 states have (on average 3.7686173331769672) internal successors, (32135), 8527 states have internal predecessors, (32135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8528 states to 8528 states and 32135 transitions. [2021-06-05 16:35:52,962 INFO L78 Accepts]: Start accepts. Automaton has 8528 states and 32135 transitions. Word has length 28 [2021-06-05 16:35:52,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:52,962 INFO L482 AbstractCegarLoop]: Abstraction has 8528 states and 32135 transitions. [2021-06-05 16:35:52,962 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) [2021-06-05 16:35:52,962 INFO L276 IsEmpty]: Start isEmpty. Operand 8528 states and 32135 transitions. [2021-06-05 16:35:52,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:52,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:52,975 INFO L521 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] [2021-06-05 16:35:53,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4052 [2021-06-05 16:35:53,175 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:53,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:53,176 INFO L82 PathProgramCache]: Analyzing trace with hash 847000247, now seen corresponding path program 89 times [2021-06-05 16:35:53,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:53,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581570948] [2021-06-05 16:35:53,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:35:53,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:53,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581570948] [2021-06-05 16:35:53,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581570948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:53,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684509308] [2021-06-05 16:35:53,212 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 [2021-06-05 16:35:53,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:35:53,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:53,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:53,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:35:53,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684509308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:53,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:53,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 16:35:53,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756381947] [2021-06-05 16:35:53,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:35:53,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:53,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:35:53,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:35:53,299 INFO L87 Difference]: Start difference. First operand 8528 states and 32135 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) [2021-06-05 16:35:53,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:53,931 INFO L93 Difference]: Finished difference Result 14252 states and 50831 transitions. [2021-06-05 16:35:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:35:53,932 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 [2021-06-05 16:35:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:53,958 INFO L225 Difference]: With dead ends: 14252 [2021-06-05 16:35:53,958 INFO L226 Difference]: Without dead ends: 14248 [2021-06-05 16:35:53,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 342.5ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:35:53,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14248 states. [2021-06-05 16:35:54,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14248 to 8428. [2021-06-05 16:35:54,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8428 states, 8427 states have (on average 3.77251690993236) internal successors, (31791), 8427 states have internal predecessors, (31791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8428 states to 8428 states and 31791 transitions. [2021-06-05 16:35:54,149 INFO L78 Accepts]: Start accepts. Automaton has 8428 states and 31791 transitions. Word has length 28 [2021-06-05 16:35:54,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:54,149 INFO L482 AbstractCegarLoop]: Abstraction has 8428 states and 31791 transitions. [2021-06-05 16:35:54,149 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) [2021-06-05 16:35:54,149 INFO L276 IsEmpty]: Start isEmpty. Operand 8428 states and 31791 transitions. [2021-06-05 16:35:54,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:54,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:54,161 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:54,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4053 [2021-06-05 16:35:54,361 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:54,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:54,362 INFO L82 PathProgramCache]: Analyzing trace with hash 795274241, now seen corresponding path program 90 times [2021-06-05 16:35:54,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:54,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556621810] [2021-06-05 16:35:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:54,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:54,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556621810] [2021-06-05 16:35:54,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556621810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:54,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327146151] [2021-06-05 16:35:54,394 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 [2021-06-05 16:35:54,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:35:54,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:54,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:54,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:54,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327146151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:54,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:54,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:35:54,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508645300] [2021-06-05 16:35:54,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:35:54,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:54,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:35:54,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:35:54,481 INFO L87 Difference]: Start difference. First operand 8428 states and 31791 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) [2021-06-05 16:35:54,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:54,907 INFO L93 Difference]: Finished difference Result 11465 states and 40959 transitions. [2021-06-05 16:35:54,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:35:54,907 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 [2021-06-05 16:35:54,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:54,927 INFO L225 Difference]: With dead ends: 11465 [2021-06-05 16:35:54,927 INFO L226 Difference]: Without dead ends: 11465 [2021-06-05 16:35:54,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:35:54,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11465 states. [2021-06-05 16:35:55,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11465 to 8331. [2021-06-05 16:35:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 3.768667466986795) internal successors, (31393), 8330 states have internal predecessors, (31393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 31393 transitions. [2021-06-05 16:35:55,120 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 31393 transitions. Word has length 28 [2021-06-05 16:35:55,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:55,120 INFO L482 AbstractCegarLoop]: Abstraction has 8331 states and 31393 transitions. [2021-06-05 16:35:55,120 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) [2021-06-05 16:35:55,120 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 31393 transitions. [2021-06-05 16:35:55,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:55,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:55,132 INFO L521 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] [2021-06-05 16:35:55,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4054 [2021-06-05 16:35:55,332 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1444336905, now seen corresponding path program 91 times [2021-06-05 16:35:55,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:55,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832560103] [2021-06-05 16:35:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:55,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:55,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832560103] [2021-06-05 16:35:55,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832560103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:55,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097685767] [2021-06-05 16:35:55,372 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 [2021-06-05 16:35:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:55,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:55,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:55,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097685767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:55,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:55,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:35:55,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702235797] [2021-06-05 16:35:55,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:35:55,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:55,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:35:55,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:35:55,453 INFO L87 Difference]: Start difference. First operand 8331 states and 31393 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) [2021-06-05 16:35:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:56,117 INFO L93 Difference]: Finished difference Result 14086 states and 50169 transitions. [2021-06-05 16:35:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:35:56,117 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 [2021-06-05 16:35:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:56,143 INFO L225 Difference]: With dead ends: 14086 [2021-06-05 16:35:56,143 INFO L226 Difference]: Without dead ends: 14074 [2021-06-05 16:35:56,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 363.9ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:35:56,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14074 states. [2021-06-05 16:35:56,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14074 to 8331. [2021-06-05 16:35:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 3.768187274909964) internal successors, (31389), 8330 states have internal predecessors, (31389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:56,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 31389 transitions. [2021-06-05 16:35:56,328 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 31389 transitions. Word has length 28 [2021-06-05 16:35:56,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:56,328 INFO L482 AbstractCegarLoop]: Abstraction has 8331 states and 31389 transitions. [2021-06-05 16:35:56,328 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) [2021-06-05 16:35:56,328 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 31389 transitions. [2021-06-05 16:35:56,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:56,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:56,341 INFO L521 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] [2021-06-05 16:35:56,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4055 [2021-06-05 16:35:56,542 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:56,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:56,542 INFO L82 PathProgramCache]: Analyzing trace with hash -323944011, now seen corresponding path program 92 times [2021-06-05 16:35:56,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:56,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7073998] [2021-06-05 16:35:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:56,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:56,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7073998] [2021-06-05 16:35:56,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7073998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:56,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749869181] [2021-06-05 16:35:56,582 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 [2021-06-05 16:35:56,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:56,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:56,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:56,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:56,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749869181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:56,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:56,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:35:56,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412888862] [2021-06-05 16:35:56,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:56,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:56,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:56,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:56,679 INFO L87 Difference]: Start difference. First operand 8331 states and 31389 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) [2021-06-05 16:35:57,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:57,849 INFO L93 Difference]: Finished difference Result 21250 states and 74521 transitions. [2021-06-05 16:35:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 16:35:57,849 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 [2021-06-05 16:35:57,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:57,888 INFO L225 Difference]: With dead ends: 21250 [2021-06-05 16:35:57,889 INFO L226 Difference]: Without dead ends: 21250 [2021-06-05 16:35:57,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 734.5ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 16:35:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21250 states. [2021-06-05 16:35:58,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21250 to 11363. [2021-06-05 16:35:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11363 states, 11362 states have (on average 3.808924485125858) internal successors, (43277), 11362 states have internal predecessors, (43277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11363 states to 11363 states and 43277 transitions. [2021-06-05 16:35:58,200 INFO L78 Accepts]: Start accepts. Automaton has 11363 states and 43277 transitions. Word has length 28 [2021-06-05 16:35:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:58,200 INFO L482 AbstractCegarLoop]: Abstraction has 11363 states and 43277 transitions. [2021-06-05 16:35:58,200 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) [2021-06-05 16:35:58,200 INFO L276 IsEmpty]: Start isEmpty. Operand 11363 states and 43277 transitions. [2021-06-05 16:35:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:58,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:58,216 INFO L521 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] [2021-06-05 16:35:58,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4056 [2021-06-05 16:35:58,417 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:58,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:58,417 INFO L82 PathProgramCache]: Analyzing trace with hash -242567923, now seen corresponding path program 93 times [2021-06-05 16:35:58,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:58,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989684587] [2021-06-05 16:35:58,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:58,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:58,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989684587] [2021-06-05 16:35:58,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989684587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:58,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472019143] [2021-06-05 16:35:58,459 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 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 [2021-06-05 16:35:58,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:35:58,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:58,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:58,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:58,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472019143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:58,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:58,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:35:58,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857811969] [2021-06-05 16:35:58,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:58,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:58,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:58,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:58,551 INFO L87 Difference]: Start difference. First operand 11363 states and 43277 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) [2021-06-05 16:35:59,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:59,621 INFO L93 Difference]: Finished difference Result 20481 states and 72514 transitions. [2021-06-05 16:35:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:35:59,621 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 [2021-06-05 16:35:59,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:59,667 INFO L225 Difference]: With dead ends: 20481 [2021-06-05 16:35:59,667 INFO L226 Difference]: Without dead ends: 20469 [2021-06-05 16:35:59,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 606.3ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:35:59,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20469 states. [2021-06-05 16:35:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20469 to 11177. [2021-06-05 16:35:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11177 states, 11176 states have (on average 3.815139584824624) internal successors, (42638), 11176 states have internal predecessors, (42638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11177 states to 11177 states and 42638 transitions. [2021-06-05 16:35:59,968 INFO L78 Accepts]: Start accepts. Automaton has 11177 states and 42638 transitions. Word has length 28 [2021-06-05 16:35:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:59,968 INFO L482 AbstractCegarLoop]: Abstraction has 11177 states and 42638 transitions. [2021-06-05 16:35:59,968 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) [2021-06-05 16:35:59,968 INFO L276 IsEmpty]: Start isEmpty. Operand 11177 states and 42638 transitions. [2021-06-05 16:35:59,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:59,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:59,984 INFO L521 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] [2021-06-05 16:36:00,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-06-05 16:36:00,185 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:00,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:00,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1757659895, now seen corresponding path program 94 times [2021-06-05 16:36:00,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:00,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460197417] [2021-06-05 16:36:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:00,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:00,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460197417] [2021-06-05 16:36:00,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460197417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:00,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445631894] [2021-06-05 16:36:00,225 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 [2021-06-05 16:36:00,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:36:00,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:00,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:00,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:00,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445631894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:00,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:00,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:36:00,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300341935] [2021-06-05 16:36:00,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:36:00,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:00,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:36:00,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:36:00,315 INFO L87 Difference]: Start difference. First operand 11177 states and 42638 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) [2021-06-05 16:36:01,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:01,313 INFO L93 Difference]: Finished difference Result 20316 states and 71936 transitions. [2021-06-05 16:36:01,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:36:01,314 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 [2021-06-05 16:36:01,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:01,352 INFO L225 Difference]: With dead ends: 20316 [2021-06-05 16:36:01,352 INFO L226 Difference]: Without dead ends: 20280 [2021-06-05 16:36:01,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 559.5ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:36:01,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20280 states. [2021-06-05 16:36:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20280 to 11229. [2021-06-05 16:36:01,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11229 states, 11228 states have (on average 3.813323833273958) internal successors, (42816), 11228 states have internal predecessors, (42816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:01,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11229 states to 11229 states and 42816 transitions. [2021-06-05 16:36:01,741 INFO L78 Accepts]: Start accepts. Automaton has 11229 states and 42816 transitions. Word has length 28 [2021-06-05 16:36:01,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:01,741 INFO L482 AbstractCegarLoop]: Abstraction has 11229 states and 42816 transitions. [2021-06-05 16:36:01,741 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) [2021-06-05 16:36:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 11229 states and 42816 transitions. [2021-06-05 16:36:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:01,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:01,758 INFO L521 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] [2021-06-05 16:36:01,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4058,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:01,961 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:01,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:01,961 INFO L82 PathProgramCache]: Analyzing trace with hash -160533179, now seen corresponding path program 95 times [2021-06-05 16:36:01,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:01,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778467690] [2021-06-05 16:36:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:02,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:02,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778467690] [2021-06-05 16:36:02,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778467690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:02,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379032410] [2021-06-05 16:36:02,005 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 [2021-06-05 16:36:02,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:36:02,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:02,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:02,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:02,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379032410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:02,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:02,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:36:02,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548638399] [2021-06-05 16:36:02,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:02,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:02,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:02,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:02,123 INFO L87 Difference]: Start difference. First operand 11229 states and 42816 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) [2021-06-05 16:36:03,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:03,484 INFO L93 Difference]: Finished difference Result 20201 states and 71663 transitions. [2021-06-05 16:36:03,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 16:36:03,484 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 [2021-06-05 16:36:03,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:03,523 INFO L225 Difference]: With dead ends: 20201 [2021-06-05 16:36:03,523 INFO L226 Difference]: Without dead ends: 20201 [2021-06-05 16:36:03,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 885.1ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:36:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20201 states. [2021-06-05 16:36:03,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20201 to 11425. [2021-06-05 16:36:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11425 states, 11424 states have (on average 3.804796918767507) internal successors, (43466), 11424 states have internal predecessors, (43466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11425 states to 11425 states and 43466 transitions. [2021-06-05 16:36:03,872 INFO L78 Accepts]: Start accepts. Automaton has 11425 states and 43466 transitions. Word has length 28 [2021-06-05 16:36:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:03,872 INFO L482 AbstractCegarLoop]: Abstraction has 11425 states and 43466 transitions. [2021-06-05 16:36:03,872 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) [2021-06-05 16:36:03,872 INFO L276 IsEmpty]: Start isEmpty. Operand 11425 states and 43466 transitions. [2021-06-05 16:36:03,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:03,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:03,889 INFO L521 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] [2021-06-05 16:36:04,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4059,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:04,090 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:04,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:04,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1482505975, now seen corresponding path program 96 times [2021-06-05 16:36:04,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:04,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909528020] [2021-06-05 16:36:04,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:04,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:04,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909528020] [2021-06-05 16:36:04,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909528020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:04,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131969024] [2021-06-05 16:36:04,130 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 [2021-06-05 16:36:04,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:36:04,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:04,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:04,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:04,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131969024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:04,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:04,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:36:04,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954650066] [2021-06-05 16:36:04,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:04,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:04,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:04,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:04,244 INFO L87 Difference]: Start difference. First operand 11425 states and 43466 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) [2021-06-05 16:36:05,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:05,497 INFO L93 Difference]: Finished difference Result 19821 states and 70618 transitions. [2021-06-05 16:36:05,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:36:05,497 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 [2021-06-05 16:36:05,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:05,536 INFO L225 Difference]: With dead ends: 19821 [2021-06-05 16:36:05,536 INFO L226 Difference]: Without dead ends: 19809 [2021-06-05 16:36:05,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 747.2ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:36:05,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19809 states. [2021-06-05 16:36:05,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19809 to 11307. [2021-06-05 16:36:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11307 states, 11306 states have (on average 3.8090394480806653) internal successors, (43065), 11306 states have internal predecessors, (43065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11307 states to 11307 states and 43065 transitions. [2021-06-05 16:36:05,817 INFO L78 Accepts]: Start accepts. Automaton has 11307 states and 43065 transitions. Word has length 28 [2021-06-05 16:36:05,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:05,817 INFO L482 AbstractCegarLoop]: Abstraction has 11307 states and 43065 transitions. [2021-06-05 16:36:05,817 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) [2021-06-05 16:36:05,817 INFO L276 IsEmpty]: Start isEmpty. Operand 11307 states and 43065 transitions. [2021-06-05 16:36:05,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:05,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:05,833 INFO L521 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] [2021-06-05 16:36:06,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4060,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:06,034 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:06,034 INFO L82 PathProgramCache]: Analyzing trace with hash 215048797, now seen corresponding path program 97 times [2021-06-05 16:36:06,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:06,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541654023] [2021-06-05 16:36:06,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:06,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:06,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541654023] [2021-06-05 16:36:06,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541654023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:06,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532147249] [2021-06-05 16:36:06,074 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 [2021-06-05 16:36:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:06,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:06,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:06,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532147249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:06,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:06,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 16:36:06,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209435207] [2021-06-05 16:36:06,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:36:06,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:06,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:36:06,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:36:06,175 INFO L87 Difference]: Start difference. First operand 11307 states and 43065 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) [2021-06-05 16:36:07,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:07,323 INFO L93 Difference]: Finished difference Result 19061 states and 68534 transitions. [2021-06-05 16:36:07,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:36:07,324 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 [2021-06-05 16:36:07,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:07,359 INFO L225 Difference]: With dead ends: 19061 [2021-06-05 16:36:07,359 INFO L226 Difference]: Without dead ends: 19025 [2021-06-05 16:36:07,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 603.9ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:36:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19025 states. [2021-06-05 16:36:07,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19025 to 11331. [2021-06-05 16:36:07,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11331 states, 11330 states have (on average 3.8080317740511913) internal successors, (43145), 11330 states have internal predecessors, (43145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11331 states to 11331 states and 43145 transitions. [2021-06-05 16:36:07,624 INFO L78 Accepts]: Start accepts. Automaton has 11331 states and 43145 transitions. Word has length 28 [2021-06-05 16:36:07,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:07,624 INFO L482 AbstractCegarLoop]: Abstraction has 11331 states and 43145 transitions. [2021-06-05 16:36:07,624 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) [2021-06-05 16:36:07,624 INFO L276 IsEmpty]: Start isEmpty. Operand 11331 states and 43145 transitions. [2021-06-05 16:36:07,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:07,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:07,641 INFO L521 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] [2021-06-05 16:36:07,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4061 [2021-06-05 16:36:07,841 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:07,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:07,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1691162673, now seen corresponding path program 98 times [2021-06-05 16:36:07,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:07,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443619794] [2021-06-05 16:36:07,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:36:07,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:07,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443619794] [2021-06-05 16:36:07,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443619794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:07,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300502040] [2021-06-05 16:36:07,876 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 [2021-06-05 16:36:07,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:36:07,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:07,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:07,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:08,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300502040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:08,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:08,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:36:08,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027877843] [2021-06-05 16:36:08,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:08,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:08,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:08,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:08,027 INFO L87 Difference]: Start difference. First operand 11331 states and 43145 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) [2021-06-05 16:36:09,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:09,398 INFO L93 Difference]: Finished difference Result 27696 states and 98852 transitions. [2021-06-05 16:36:09,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 16:36:09,399 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 [2021-06-05 16:36:09,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:09,456 INFO L225 Difference]: With dead ends: 27696 [2021-06-05 16:36:09,456 INFO L226 Difference]: Without dead ends: 27696 [2021-06-05 16:36:09,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2316 ImplicationChecksByTransitivity, 843.8ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 16:36:09,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27696 states. [2021-06-05 16:36:09,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27696 to 11621. [2021-06-05 16:36:09,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11621 states, 11620 states have (on average 3.831239242685026) internal successors, (44519), 11620 states have internal predecessors, (44519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11621 states to 11621 states and 44519 transitions. [2021-06-05 16:36:09,803 INFO L78 Accepts]: Start accepts. Automaton has 11621 states and 44519 transitions. Word has length 28 [2021-06-05 16:36:09,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:09,803 INFO L482 AbstractCegarLoop]: Abstraction has 11621 states and 44519 transitions. [2021-06-05 16:36:09,804 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) [2021-06-05 16:36:09,804 INFO L276 IsEmpty]: Start isEmpty. Operand 11621 states and 44519 transitions. [2021-06-05 16:36:09,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:09,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:09,820 INFO L521 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] [2021-06-05 16:36:10,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4062,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:10,021 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:10,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:10,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2036852543, now seen corresponding path program 99 times [2021-06-05 16:36:10,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:10,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273160895] [2021-06-05 16:36:10,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:36:10,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:10,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273160895] [2021-06-05 16:36:10,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273160895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:10,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762685343] [2021-06-05 16:36:10,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:36:10,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:36:10,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:10,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:10,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:10,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762685343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:10,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:10,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:36:10,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300807093] [2021-06-05 16:36:10,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:10,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:10,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:10,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:10,181 INFO L87 Difference]: Start difference. First operand 11621 states and 44519 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) [2021-06-05 16:36:11,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:11,401 INFO L93 Difference]: Finished difference Result 27229 states and 97782 transitions. [2021-06-05 16:36:11,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 16:36:11,402 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 [2021-06-05 16:36:11,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:11,462 INFO L225 Difference]: With dead ends: 27229 [2021-06-05 16:36:11,462 INFO L226 Difference]: Without dead ends: 27229 [2021-06-05 16:36:11,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 747.0ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:36:11,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27229 states. [2021-06-05 16:36:11,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27229 to 11523. [2021-06-05 16:36:11,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11523 states, 11522 states have (on average 3.819562575941677) internal successors, (44009), 11522 states have internal predecessors, (44009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:11,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11523 states to 11523 states and 44009 transitions. [2021-06-05 16:36:11,926 INFO L78 Accepts]: Start accepts. Automaton has 11523 states and 44009 transitions. Word has length 28 [2021-06-05 16:36:11,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:11,926 INFO L482 AbstractCegarLoop]: Abstraction has 11523 states and 44009 transitions. [2021-06-05 16:36:11,926 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) [2021-06-05 16:36:11,926 INFO L276 IsEmpty]: Start isEmpty. Operand 11523 states and 44009 transitions. [2021-06-05 16:36:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:11,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:11,944 INFO L521 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] [2021-06-05 16:36:12,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4063 [2021-06-05 16:36:12,144 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:12,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:12,145 INFO L82 PathProgramCache]: Analyzing trace with hash 197254951, now seen corresponding path program 100 times [2021-06-05 16:36:12,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:12,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712171656] [2021-06-05 16:36:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:36:12,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:12,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712171656] [2021-06-05 16:36:12,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712171656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:12,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143660827] [2021-06-05 16:36:12,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:36:12,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:36:12,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:12,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:12,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:12,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143660827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:12,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:12,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:36:12,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542778330] [2021-06-05 16:36:12,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:36:12,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:12,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:36:12,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:36:12,318 INFO L87 Difference]: Start difference. First operand 11523 states and 44009 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) [2021-06-05 16:36:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:13,140 INFO L93 Difference]: Finished difference Result 21512 states and 77611 transitions. [2021-06-05 16:36:13,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:36:13,140 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 [2021-06-05 16:36:13,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:13,180 INFO L225 Difference]: With dead ends: 21512 [2021-06-05 16:36:13,180 INFO L226 Difference]: Without dead ends: 21512 [2021-06-05 16:36:13,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:36:13,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21512 states. [2021-06-05 16:36:13,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21512 to 11532. [2021-06-05 16:36:13,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11532 states, 11531 states have (on average 3.8185760124880757) internal successors, (44032), 11531 states have internal predecessors, (44032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11532 states to 11532 states and 44032 transitions. [2021-06-05 16:36:13,449 INFO L78 Accepts]: Start accepts. Automaton has 11532 states and 44032 transitions. Word has length 28 [2021-06-05 16:36:13,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:13,449 INFO L482 AbstractCegarLoop]: Abstraction has 11532 states and 44032 transitions. [2021-06-05 16:36:13,449 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) [2021-06-05 16:36:13,449 INFO L276 IsEmpty]: Start isEmpty. Operand 11532 states and 44032 transitions. [2021-06-05 16:36:13,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:13,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:13,465 INFO L521 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] [2021-06-05 16:36:13,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4064 [2021-06-05 16:36:13,666 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:13,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:13,666 INFO L82 PathProgramCache]: Analyzing trace with hash -477466927, now seen corresponding path program 101 times [2021-06-05 16:36:13,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:13,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313674509] [2021-06-05 16:36:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:13,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:36:13,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:13,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313674509] [2021-06-05 16:36:13,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313674509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:13,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120557360] [2021-06-05 16:36:13,701 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 [2021-06-05 16:36:13,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:36:13,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:13,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:13,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:13,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120557360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:13,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:13,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:36:13,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387763323] [2021-06-05 16:36:13,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:36:13,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:13,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:36:13,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:36:13,817 INFO L87 Difference]: Start difference. First operand 11532 states and 44032 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) [2021-06-05 16:36:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:14,618 INFO L93 Difference]: Finished difference Result 19923 states and 72552 transitions. [2021-06-05 16:36:14,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:36:14,619 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 [2021-06-05 16:36:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:14,657 INFO L225 Difference]: With dead ends: 19923 [2021-06-05 16:36:14,657 INFO L226 Difference]: Without dead ends: 19923 [2021-06-05 16:36:14,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 420.7ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:36:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19923 states. [2021-06-05 16:36:14,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19923 to 11544. [2021-06-05 16:36:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11544 states, 11543 states have (on average 3.817898293337954) internal successors, (44070), 11543 states have internal predecessors, (44070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:14,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11544 states to 11544 states and 44070 transitions. [2021-06-05 16:36:14,932 INFO L78 Accepts]: Start accepts. Automaton has 11544 states and 44070 transitions. Word has length 28 [2021-06-05 16:36:14,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:14,932 INFO L482 AbstractCegarLoop]: Abstraction has 11544 states and 44070 transitions. [2021-06-05 16:36:14,932 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) [2021-06-05 16:36:14,932 INFO L276 IsEmpty]: Start isEmpty. Operand 11544 states and 44070 transitions. [2021-06-05 16:36:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:14,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:14,949 INFO L521 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] [2021-06-05 16:36:15,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4065 [2021-06-05 16:36:15,150 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:15,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:15,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893249, now seen corresponding path program 102 times [2021-06-05 16:36:15,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:15,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527168998] [2021-06-05 16:36:15,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:36:15,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:15,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527168998] [2021-06-05 16:36:15,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527168998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:15,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427429139] [2021-06-05 16:36:15,186 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 [2021-06-05 16:36:15,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:36:15,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:15,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:15,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:15,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427429139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:15,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:15,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:36:15,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554689914] [2021-06-05 16:36:15,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:15,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:15,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:15,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:15,311 INFO L87 Difference]: Start difference. First operand 11544 states and 44070 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) [2021-06-05 16:36:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:16,377 INFO L93 Difference]: Finished difference Result 20543 states and 74326 transitions. [2021-06-05 16:36:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 16:36:16,378 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 [2021-06-05 16:36:16,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:16,418 INFO L225 Difference]: With dead ends: 20543 [2021-06-05 16:36:16,418 INFO L226 Difference]: Without dead ends: 20543 [2021-06-05 16:36:16,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 679.9ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 16:36:16,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20543 states. [2021-06-05 16:36:16,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20543 to 11652. [2021-06-05 16:36:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11652 states, 11651 states have (on average 3.8111750064372156) internal successors, (44404), 11651 states have internal predecessors, (44404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11652 states to 11652 states and 44404 transitions. [2021-06-05 16:36:16,709 INFO L78 Accepts]: Start accepts. Automaton has 11652 states and 44404 transitions. Word has length 28 [2021-06-05 16:36:16,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:16,709 INFO L482 AbstractCegarLoop]: Abstraction has 11652 states and 44404 transitions. [2021-06-05 16:36:16,709 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) [2021-06-05 16:36:16,709 INFO L276 IsEmpty]: Start isEmpty. Operand 11652 states and 44404 transitions. [2021-06-05 16:36:16,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:16,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:16,726 INFO L521 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] [2021-06-05 16:36:16,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4066,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:16,927 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:16,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:16,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1476034893, now seen corresponding path program 103 times [2021-06-05 16:36:16,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:16,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622786224] [2021-06-05 16:36:16,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:36:16,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:16,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622786224] [2021-06-05 16:36:16,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622786224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:16,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947272080] [2021-06-05 16:36:16,987 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 [2021-06-05 16:36:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:17,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:17,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:17,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947272080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:17,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:17,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:36:17,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885541290] [2021-06-05 16:36:17,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:17,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:17,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:17,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:17,106 INFO L87 Difference]: Start difference. First operand 11652 states and 44404 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) [2021-06-05 16:36:18,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:18,100 INFO L93 Difference]: Finished difference Result 20102 states and 73128 transitions. [2021-06-05 16:36:18,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:36:18,101 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 [2021-06-05 16:36:18,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:18,140 INFO L225 Difference]: With dead ends: 20102 [2021-06-05 16:36:18,140 INFO L226 Difference]: Without dead ends: 20098 [2021-06-05 16:36:18,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 586.6ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:36:18,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20098 states. [2021-06-05 16:36:18,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20098 to 11578. [2021-06-05 16:36:18,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11578 states, 11577 states have (on average 3.814891595404682) internal successors, (44165), 11577 states have internal predecessors, (44165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11578 states to 11578 states and 44165 transitions. [2021-06-05 16:36:18,438 INFO L78 Accepts]: Start accepts. Automaton has 11578 states and 44165 transitions. Word has length 28 [2021-06-05 16:36:18,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:18,438 INFO L482 AbstractCegarLoop]: Abstraction has 11578 states and 44165 transitions. [2021-06-05 16:36:18,438 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) [2021-06-05 16:36:18,438 INFO L276 IsEmpty]: Start isEmpty. Operand 11578 states and 44165 transitions. [2021-06-05 16:36:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:18,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:18,456 INFO L521 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] [2021-06-05 16:36:18,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-06-05 16:36:18,657 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:18,657 INFO L82 PathProgramCache]: Analyzing trace with hash 729404223, now seen corresponding path program 104 times [2021-06-05 16:36:18,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:18,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610131137] [2021-06-05 16:36:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:18,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:18,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610131137] [2021-06-05 16:36:18,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610131137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:18,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302498022] [2021-06-05 16:36:18,697 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 [2021-06-05 16:36:18,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:36:18,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:18,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:18,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:18,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302498022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:18,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:18,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:36:18,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141843892] [2021-06-05 16:36:18,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:18,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:18,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:18,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:18,814 INFO L87 Difference]: Start difference. First operand 11578 states and 44165 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) [2021-06-05 16:36:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:19,924 INFO L93 Difference]: Finished difference Result 19515 states and 70543 transitions. [2021-06-05 16:36:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:36:19,924 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 [2021-06-05 16:36:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:19,962 INFO L225 Difference]: With dead ends: 19515 [2021-06-05 16:36:19,963 INFO L226 Difference]: Without dead ends: 19515 [2021-06-05 16:36:19,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 673.8ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:36:19,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19515 states. [2021-06-05 16:36:20,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19515 to 11805. [2021-06-05 16:36:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11805 states, 11804 states have (on average 3.8176042019654353) internal successors, (45063), 11804 states have internal predecessors, (45063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:20,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11805 states to 11805 states and 45063 transitions. [2021-06-05 16:36:20,305 INFO L78 Accepts]: Start accepts. Automaton has 11805 states and 45063 transitions. Word has length 28 [2021-06-05 16:36:20,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:20,305 INFO L482 AbstractCegarLoop]: Abstraction has 11805 states and 45063 transitions. [2021-06-05 16:36:20,305 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) [2021-06-05 16:36:20,305 INFO L276 IsEmpty]: Start isEmpty. Operand 11805 states and 45063 transitions. [2021-06-05 16:36:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:20,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:20,322 INFO L521 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] [2021-06-05 16:36:20,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4068 [2021-06-05 16:36:20,523 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:20,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:20,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1909723903, now seen corresponding path program 105 times [2021-06-05 16:36:20,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:20,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947851954] [2021-06-05 16:36:20,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:20,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:20,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947851954] [2021-06-05 16:36:20,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947851954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:20,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954234412] [2021-06-05 16:36:20,564 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 [2021-06-05 16:36:20,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:36:20,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:20,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:20,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:20,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954234412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:20,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:20,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:36:20,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337783190] [2021-06-05 16:36:20,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:20,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:20,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:20,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:20,696 INFO L87 Difference]: Start difference. First operand 11805 states and 45063 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) [2021-06-05 16:36:21,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:21,649 INFO L93 Difference]: Finished difference Result 19219 states and 69718 transitions. [2021-06-05 16:36:21,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:36:21,649 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 [2021-06-05 16:36:21,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:21,686 INFO L225 Difference]: With dead ends: 19219 [2021-06-05 16:36:21,686 INFO L226 Difference]: Without dead ends: 19207 [2021-06-05 16:36:21,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 570.8ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:36:21,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19207 states. [2021-06-05 16:36:21,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19207 to 11907. [2021-06-05 16:36:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11907 states, 11906 states have (on average 3.81202754913489) internal successors, (45386), 11906 states have internal predecessors, (45386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:21,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11907 states to 11907 states and 45386 transitions. [2021-06-05 16:36:21,970 INFO L78 Accepts]: Start accepts. Automaton has 11907 states and 45386 transitions. Word has length 28 [2021-06-05 16:36:21,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:21,970 INFO L482 AbstractCegarLoop]: Abstraction has 11907 states and 45386 transitions. [2021-06-05 16:36:21,970 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) [2021-06-05 16:36:21,970 INFO L276 IsEmpty]: Start isEmpty. Operand 11907 states and 45386 transitions. [2021-06-05 16:36:21,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:21,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:21,989 INFO L521 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] [2021-06-05 16:36:22,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:22,189 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:22,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:22,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1714650925, now seen corresponding path program 70 times [2021-06-05 16:36:22,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:22,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87843085] [2021-06-05 16:36:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:22,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:22,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87843085] [2021-06-05 16:36:22,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87843085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:22,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330678472] [2021-06-05 16:36:22,232 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 [2021-06-05 16:36:22,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:36:22,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:22,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:22,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:22,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330678472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:22,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:22,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:36:22,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078240301] [2021-06-05 16:36:22,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:36:22,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:22,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:36:22,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:36:22,319 INFO L87 Difference]: Start difference. First operand 11907 states and 45386 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) [2021-06-05 16:36:22,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:22,801 INFO L93 Difference]: Finished difference Result 16719 states and 62078 transitions. [2021-06-05 16:36:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:36:22,802 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 [2021-06-05 16:36:22,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:22,833 INFO L225 Difference]: With dead ends: 16719 [2021-06-05 16:36:22,833 INFO L226 Difference]: Without dead ends: 16719 [2021-06-05 16:36:22,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 251.4ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:36:22,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16719 states. [2021-06-05 16:36:23,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16719 to 11979. [2021-06-05 16:36:23,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11979 states, 11978 states have (on average 3.8078143262648187) internal successors, (45610), 11978 states have internal predecessors, (45610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:23,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11979 states to 11979 states and 45610 transitions. [2021-06-05 16:36:23,131 INFO L78 Accepts]: Start accepts. Automaton has 11979 states and 45610 transitions. Word has length 28 [2021-06-05 16:36:23,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:23,131 INFO L482 AbstractCegarLoop]: Abstraction has 11979 states and 45610 transitions. [2021-06-05 16:36:23,131 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) [2021-06-05 16:36:23,131 INFO L276 IsEmpty]: Start isEmpty. Operand 11979 states and 45610 transitions. [2021-06-05 16:36:23,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:23,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:23,148 INFO L521 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] [2021-06-05 16:36:23,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4070 [2021-06-05 16:36:23,348 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:23,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:23,349 INFO L82 PathProgramCache]: Analyzing trace with hash -55855667, now seen corresponding path program 71 times [2021-06-05 16:36:23,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:23,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796211837] [2021-06-05 16:36:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:23,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:23,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796211837] [2021-06-05 16:36:23,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796211837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:23,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406456959] [2021-06-05 16:36:23,383 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 [2021-06-05 16:36:23,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:36:23,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:23,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:23,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:23,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406456959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:23,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:23,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:36:23,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386451098] [2021-06-05 16:36:23,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:36:23,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:23,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:36:23,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:36:23,469 INFO L87 Difference]: Start difference. First operand 11979 states and 45610 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) [2021-06-05 16:36:23,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:23,983 INFO L93 Difference]: Finished difference Result 17700 states and 64924 transitions. [2021-06-05 16:36:23,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:36:23,984 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 [2021-06-05 16:36:23,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:24,017 INFO L225 Difference]: With dead ends: 17700 [2021-06-05 16:36:24,017 INFO L226 Difference]: Without dead ends: 17700 [2021-06-05 16:36:24,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 291.0ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:36:24,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17700 states. [2021-06-05 16:36:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17700 to 12313. [2021-06-05 16:36:24,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12313 states, 12312 states have (on average 3.790529564652372) internal successors, (46669), 12312 states have internal predecessors, (46669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12313 states to 12313 states and 46669 transitions. [2021-06-05 16:36:24,279 INFO L78 Accepts]: Start accepts. Automaton has 12313 states and 46669 transitions. Word has length 28 [2021-06-05 16:36:24,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:24,279 INFO L482 AbstractCegarLoop]: Abstraction has 12313 states and 46669 transitions. [2021-06-05 16:36:24,279 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) [2021-06-05 16:36:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 12313 states and 46669 transitions. [2021-06-05 16:36:24,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:24,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:24,297 INFO L521 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] [2021-06-05 16:36:24,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4071,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:24,498 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:24,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:24,498 INFO L82 PathProgramCache]: Analyzing trace with hash -100676809, now seen corresponding path program 72 times [2021-06-05 16:36:24,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:24,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815763250] [2021-06-05 16:36:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:36:24,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:24,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815763250] [2021-06-05 16:36:24,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815763250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:24,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260056794] [2021-06-05 16:36:24,534 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 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 [2021-06-05 16:36:24,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:36:24,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:24,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:24,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:36:24,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260056794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:24,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:24,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:36:24,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208632612] [2021-06-05 16:36:24,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:36:24,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:24,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:36:24,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:36:24,619 INFO L87 Difference]: Start difference. First operand 12313 states and 46669 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) [2021-06-05 16:36:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:25,056 INFO L93 Difference]: Finished difference Result 17190 states and 63587 transitions. [2021-06-05 16:36:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:36:25,057 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 [2021-06-05 16:36:25,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:25,090 INFO L225 Difference]: With dead ends: 17190 [2021-06-05 16:36:25,090 INFO L226 Difference]: Without dead ends: 17182 [2021-06-05 16:36:25,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:36:25,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17182 states. [2021-06-05 16:36:25,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17182 to 12253. [2021-06-05 16:36:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12253 states, 12252 states have (on average 3.7924420502775056) internal successors, (46465), 12252 states have internal predecessors, (46465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:25,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12253 states to 12253 states and 46465 transitions. [2021-06-05 16:36:25,348 INFO L78 Accepts]: Start accepts. Automaton has 12253 states and 46465 transitions. Word has length 28 [2021-06-05 16:36:25,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:25,349 INFO L482 AbstractCegarLoop]: Abstraction has 12253 states and 46465 transitions. [2021-06-05 16:36:25,349 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) [2021-06-05 16:36:25,349 INFO L276 IsEmpty]: Start isEmpty. Operand 12253 states and 46465 transitions. [2021-06-05 16:36:25,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:25,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:25,456 INFO L521 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] [2021-06-05 16:36:25,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4072 [2021-06-05 16:36:25,656 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:25,657 INFO L82 PathProgramCache]: Analyzing trace with hash 496659849, now seen corresponding path program 73 times [2021-06-05 16:36:25,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:25,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603256946] [2021-06-05 16:36:25,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:25,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:25,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603256946] [2021-06-05 16:36:25,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603256946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:25,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118808950] [2021-06-05 16:36:25,700 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 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 [2021-06-05 16:36:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:25,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:25,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:25,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118808950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:25,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:25,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:36:25,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181909216] [2021-06-05 16:36:25,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:36:25,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:25,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:36:25,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:36:25,788 INFO L87 Difference]: Start difference. First operand 12253 states and 46465 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) [2021-06-05 16:36:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:26,290 INFO L93 Difference]: Finished difference Result 17090 states and 63299 transitions. [2021-06-05 16:36:26,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:36:26,291 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 [2021-06-05 16:36:26,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:26,329 INFO L225 Difference]: With dead ends: 17090 [2021-06-05 16:36:26,330 INFO L226 Difference]: Without dead ends: 17078 [2021-06-05 16:36:26,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 260.5ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:36:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17078 states. [2021-06-05 16:36:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17078 to 12219. [2021-06-05 16:36:26,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12219 states, 12218 states have (on average 3.7944017024062857) internal successors, (46360), 12218 states have internal predecessors, (46360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12219 states to 12219 states and 46360 transitions. [2021-06-05 16:36:26,634 INFO L78 Accepts]: Start accepts. Automaton has 12219 states and 46360 transitions. Word has length 28 [2021-06-05 16:36:26,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:26,634 INFO L482 AbstractCegarLoop]: Abstraction has 12219 states and 46360 transitions. [2021-06-05 16:36:26,634 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) [2021-06-05 16:36:26,634 INFO L276 IsEmpty]: Start isEmpty. Operand 12219 states and 46360 transitions. [2021-06-05 16:36:26,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:26,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:26,653 INFO L521 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] [2021-06-05 16:36:26,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4073,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:26,854 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:26,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:26,854 INFO L82 PathProgramCache]: Analyzing trace with hash -158749623, now seen corresponding path program 74 times [2021-06-05 16:36:26,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:26,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492234007] [2021-06-05 16:36:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:36:26,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:26,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492234007] [2021-06-05 16:36:26,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492234007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:26,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259543721] [2021-06-05 16:36:26,889 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 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 [2021-06-05 16:36:26,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:36:26,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:26,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:26,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:27,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259543721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:27,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:27,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:36:27,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642113963] [2021-06-05 16:36:27,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:36:27,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:27,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:36:27,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:36:27,006 INFO L87 Difference]: Start difference. First operand 12219 states and 46360 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) [2021-06-05 16:36:27,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:27,941 INFO L93 Difference]: Finished difference Result 23045 states and 82416 transitions. [2021-06-05 16:36:27,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:36:27,941 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 [2021-06-05 16:36:27,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:27,984 INFO L225 Difference]: With dead ends: 23045 [2021-06-05 16:36:27,984 INFO L226 Difference]: Without dead ends: 23045 [2021-06-05 16:36:27,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 519.8ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:36:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23045 states. [2021-06-05 16:36:28,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23045 to 12201. [2021-06-05 16:36:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12201 states, 12200 states have (on average 3.7931967213114755) internal successors, (46277), 12200 states have internal predecessors, (46277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:28,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12201 states to 12201 states and 46277 transitions. [2021-06-05 16:36:28,275 INFO L78 Accepts]: Start accepts. Automaton has 12201 states and 46277 transitions. Word has length 28 [2021-06-05 16:36:28,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:28,275 INFO L482 AbstractCegarLoop]: Abstraction has 12201 states and 46277 transitions. [2021-06-05 16:36:28,275 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) [2021-06-05 16:36:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 12201 states and 46277 transitions. [2021-06-05 16:36:28,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:28,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:28,292 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:28,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4074,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:28,493 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:28,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:28,493 INFO L82 PathProgramCache]: Analyzing trace with hash 368022285, now seen corresponding path program 106 times [2021-06-05 16:36:28,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:28,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442855209] [2021-06-05 16:36:28,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:36:28,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:28,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442855209] [2021-06-05 16:36:28,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442855209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:28,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961975247] [2021-06-05 16:36:28,522 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 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 [2021-06-05 16:36:28,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:36:28,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:28,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:28,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:28,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961975247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:28,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:28,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:36:28,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576650792] [2021-06-05 16:36:28,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:36:28,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:28,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:36:28,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:36:28,631 INFO L87 Difference]: Start difference. First operand 12201 states and 46277 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) [2021-06-05 16:36:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:29,355 INFO L93 Difference]: Finished difference Result 18822 states and 68098 transitions. [2021-06-05 16:36:29,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:36:29,356 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 [2021-06-05 16:36:29,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:29,390 INFO L225 Difference]: With dead ends: 18822 [2021-06-05 16:36:29,390 INFO L226 Difference]: Without dead ends: 18806 [2021-06-05 16:36:29,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 419.2ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:36:29,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18806 states. [2021-06-05 16:36:29,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18806 to 13509. [2021-06-05 16:36:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13509 states, 13508 states have (on average 3.85475273911756) internal successors, (52070), 13508 states have internal predecessors, (52070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:29,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13509 states to 13509 states and 52070 transitions. [2021-06-05 16:36:29,686 INFO L78 Accepts]: Start accepts. Automaton has 13509 states and 52070 transitions. Word has length 28 [2021-06-05 16:36:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:29,687 INFO L482 AbstractCegarLoop]: Abstraction has 13509 states and 52070 transitions. [2021-06-05 16:36:29,687 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) [2021-06-05 16:36:29,687 INFO L276 IsEmpty]: Start isEmpty. Operand 13509 states and 52070 transitions. [2021-06-05 16:36:29,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:29,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:29,707 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:29,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4075 [2021-06-05 16:36:29,908 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:29,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:29,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1040435067, now seen corresponding path program 107 times [2021-06-05 16:36:29,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:29,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454971674] [2021-06-05 16:36:29,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:36:29,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:29,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454971674] [2021-06-05 16:36:29,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454971674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:29,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431875636] [2021-06-05 16:36:29,935 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 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 [2021-06-05 16:36:29,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:36:29,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:29,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:29,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:30,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431875636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:30,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:30,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:36:30,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666006956] [2021-06-05 16:36:30,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:36:30,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:30,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:36:30,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:36:30,045 INFO L87 Difference]: Start difference. First operand 13509 states and 52070 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) [2021-06-05 16:36:30,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:30,799 INFO L93 Difference]: Finished difference Result 18923 states and 68358 transitions. [2021-06-05 16:36:30,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:36:30,800 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 [2021-06-05 16:36:30,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:30,835 INFO L225 Difference]: With dead ends: 18923 [2021-06-05 16:36:30,835 INFO L226 Difference]: Without dead ends: 18917 [2021-06-05 16:36:30,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 411.4ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:36:30,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18917 states. [2021-06-05 16:36:31,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18917 to 13479. [2021-06-05 16:36:31,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13479 states, 13478 states have (on average 3.8540584656477224) internal successors, (51945), 13478 states have internal predecessors, (51945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:31,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 51945 transitions. [2021-06-05 16:36:31,137 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 51945 transitions. Word has length 28 [2021-06-05 16:36:31,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:31,137 INFO L482 AbstractCegarLoop]: Abstraction has 13479 states and 51945 transitions. [2021-06-05 16:36:31,137 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) [2021-06-05 16:36:31,138 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 51945 transitions. [2021-06-05 16:36:31,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:31,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:31,159 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:31,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4076,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:31,359 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:31,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:31,360 INFO L82 PathProgramCache]: Analyzing trace with hash -774903755, now seen corresponding path program 108 times [2021-06-05 16:36:31,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:31,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658194771] [2021-06-05 16:36:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:31,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:31,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658194771] [2021-06-05 16:36:31,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658194771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:31,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867922906] [2021-06-05 16:36:31,386 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 [2021-06-05 16:36:31,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:36:31,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:31,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:31,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:31,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867922906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:31,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:31,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 16:36:31,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571165016] [2021-06-05 16:36:31,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:36:31,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:31,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:36:31,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:36:31,488 INFO L87 Difference]: Start difference. First operand 13479 states and 51945 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) [2021-06-05 16:36:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:32,120 INFO L93 Difference]: Finished difference Result 21275 states and 76975 transitions. [2021-06-05 16:36:32,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:36:32,120 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 [2021-06-05 16:36:32,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:32,159 INFO L225 Difference]: With dead ends: 21275 [2021-06-05 16:36:32,159 INFO L226 Difference]: Without dead ends: 21259 [2021-06-05 16:36:32,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 328.8ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:36:32,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21259 states. [2021-06-05 16:36:32,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21259 to 13567. [2021-06-05 16:36:32,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13567 states, 13566 states have (on average 3.861270824119121) internal successors, (52382), 13566 states have internal predecessors, (52382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13567 states to 13567 states and 52382 transitions. [2021-06-05 16:36:32,536 INFO L78 Accepts]: Start accepts. Automaton has 13567 states and 52382 transitions. Word has length 28 [2021-06-05 16:36:32,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:32,536 INFO L482 AbstractCegarLoop]: Abstraction has 13567 states and 52382 transitions. [2021-06-05 16:36:32,536 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) [2021-06-05 16:36:32,536 INFO L276 IsEmpty]: Start isEmpty. Operand 13567 states and 52382 transitions. [2021-06-05 16:36:32,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:32,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:32,558 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:32,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4077 [2021-06-05 16:36:32,759 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:32,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:32,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1457648085, now seen corresponding path program 109 times [2021-06-05 16:36:32,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:32,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963545270] [2021-06-05 16:36:32,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:32,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:32,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963545270] [2021-06-05 16:36:32,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963545270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:32,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459922769] [2021-06-05 16:36:32,785 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 [2021-06-05 16:36:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:32,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:32,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:32,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459922769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:32,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:32,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 16:36:32,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172157352] [2021-06-05 16:36:32,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:36:32,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:32,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:36:32,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:36:32,887 INFO L87 Difference]: Start difference. First operand 13567 states and 52382 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) [2021-06-05 16:36:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:33,574 INFO L93 Difference]: Finished difference Result 22620 states and 81208 transitions. [2021-06-05 16:36:33,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:36:33,575 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 [2021-06-05 16:36:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:33,617 INFO L225 Difference]: With dead ends: 22620 [2021-06-05 16:36:33,618 INFO L226 Difference]: Without dead ends: 22620 [2021-06-05 16:36:33,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:36:33,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22620 states. [2021-06-05 16:36:33,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22620 to 13595. [2021-06-05 16:36:33,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13595 states, 13594 states have (on average 3.8592761512431957) internal successors, (52463), 13594 states have internal predecessors, (52463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13595 states to 13595 states and 52463 transitions. [2021-06-05 16:36:33,939 INFO L78 Accepts]: Start accepts. Automaton has 13595 states and 52463 transitions. Word has length 28 [2021-06-05 16:36:33,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:33,939 INFO L482 AbstractCegarLoop]: Abstraction has 13595 states and 52463 transitions. [2021-06-05 16:36:33,939 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) [2021-06-05 16:36:33,939 INFO L276 IsEmpty]: Start isEmpty. Operand 13595 states and 52463 transitions. [2021-06-05 16:36:33,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:33,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:33,960 INFO L521 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] [2021-06-05 16:36:34,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-06-05 16:36:34,160 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:34,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:34,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1381492369, now seen corresponding path program 75 times [2021-06-05 16:36:34,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:34,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846679892] [2021-06-05 16:36:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:34,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:34,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846679892] [2021-06-05 16:36:34,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846679892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:34,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425326288] [2021-06-05 16:36:34,194 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 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 [2021-06-05 16:36:34,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:36:34,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:34,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:34,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:34,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425326288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:34,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:34,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:36:34,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512445320] [2021-06-05 16:36:34,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:36:34,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:34,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:36:34,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:36:34,294 INFO L87 Difference]: Start difference. First operand 13595 states and 52463 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) [2021-06-05 16:36:35,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:35,206 INFO L93 Difference]: Finished difference Result 23180 states and 85433 transitions. [2021-06-05 16:36:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:36:35,207 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 [2021-06-05 16:36:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:35,254 INFO L225 Difference]: With dead ends: 23180 [2021-06-05 16:36:35,254 INFO L226 Difference]: Without dead ends: 23176 [2021-06-05 16:36:35,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 528.1ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:36:35,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23176 states. [2021-06-05 16:36:35,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23176 to 13849. [2021-06-05 16:36:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13849 states, 13848 states have (on average 3.849364529173888) internal successors, (53306), 13848 states have internal predecessors, (53306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13849 states to 13849 states and 53306 transitions. [2021-06-05 16:36:35,696 INFO L78 Accepts]: Start accepts. Automaton has 13849 states and 53306 transitions. Word has length 28 [2021-06-05 16:36:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:35,696 INFO L482 AbstractCegarLoop]: Abstraction has 13849 states and 53306 transitions. [2021-06-05 16:36:35,696 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) [2021-06-05 16:36:35,696 INFO L276 IsEmpty]: Start isEmpty. Operand 13849 states and 53306 transitions. [2021-06-05 16:36:35,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:35,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:35,719 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:35,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4079 [2021-06-05 16:36:35,920 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:35,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:35,920 INFO L82 PathProgramCache]: Analyzing trace with hash -516108431, now seen corresponding path program 110 times [2021-06-05 16:36:35,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:35,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730441364] [2021-06-05 16:36:35,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:35,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:35,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730441364] [2021-06-05 16:36:35,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730441364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:35,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530385013] [2021-06-05 16:36:35,952 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 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 [2021-06-05 16:36:35,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:36:35,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:35,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:35,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:36,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530385013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:36,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:36,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:36:36,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703686961] [2021-06-05 16:36:36,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:36:36,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:36,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:36:36,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:36:36,044 INFO L87 Difference]: Start difference. First operand 13849 states and 53306 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) [2021-06-05 16:36:36,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:36,665 INFO L93 Difference]: Finished difference Result 20157 states and 74048 transitions. [2021-06-05 16:36:36,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:36:36,665 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 [2021-06-05 16:36:36,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:36,705 INFO L225 Difference]: With dead ends: 20157 [2021-06-05 16:36:36,705 INFO L226 Difference]: Without dead ends: 20131 [2021-06-05 16:36:36,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 331.9ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:36:36,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20131 states. [2021-06-05 16:36:36,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20131 to 13251. [2021-06-05 16:36:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13251 states, 13250 states have (on average 3.8595471698113206) internal successors, (51139), 13250 states have internal predecessors, (51139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:37,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13251 states to 13251 states and 51139 transitions. [2021-06-05 16:36:37,002 INFO L78 Accepts]: Start accepts. Automaton has 13251 states and 51139 transitions. Word has length 28 [2021-06-05 16:36:37,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:37,002 INFO L482 AbstractCegarLoop]: Abstraction has 13251 states and 51139 transitions. [2021-06-05 16:36:37,002 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) [2021-06-05 16:36:37,002 INFO L276 IsEmpty]: Start isEmpty. Operand 13251 states and 51139 transitions. [2021-06-05 16:36:37,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:37,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:37,022 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:37,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4080,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:37,223 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:37,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:37,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1198852761, now seen corresponding path program 111 times [2021-06-05 16:36:37,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:37,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487222005] [2021-06-05 16:36:37,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:37,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:37,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487222005] [2021-06-05 16:36:37,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487222005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:37,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494641579] [2021-06-05 16:36:37,254 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 [2021-06-05 16:36:37,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:36:37,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:37,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:37,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:37,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494641579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:37,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:37,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:36:37,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141144904] [2021-06-05 16:36:37,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:36:37,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:37,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:36:37,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:36:37,352 INFO L87 Difference]: Start difference. First operand 13251 states and 51139 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) [2021-06-05 16:36:38,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:38,082 INFO L93 Difference]: Finished difference Result 19214 states and 69517 transitions. [2021-06-05 16:36:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:36:38,082 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 [2021-06-05 16:36:38,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:38,120 INFO L225 Difference]: With dead ends: 19214 [2021-06-05 16:36:38,120 INFO L226 Difference]: Without dead ends: 19214 [2021-06-05 16:36:38,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 414.1ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:36:38,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19214 states. [2021-06-05 16:36:38,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19214 to 13464. [2021-06-05 16:36:38,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13464 states, 13463 states have (on average 3.854935749832875) internal successors, (51899), 13463 states have internal predecessors, (51899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13464 states to 13464 states and 51899 transitions. [2021-06-05 16:36:38,409 INFO L78 Accepts]: Start accepts. Automaton has 13464 states and 51899 transitions. Word has length 28 [2021-06-05 16:36:38,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:38,409 INFO L482 AbstractCegarLoop]: Abstraction has 13464 states and 51899 transitions. [2021-06-05 16:36:38,409 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) [2021-06-05 16:36:38,409 INFO L276 IsEmpty]: Start isEmpty. Operand 13464 states and 51899 transitions. [2021-06-05 16:36:38,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:38,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:38,520 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:38,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:38,721 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:38,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:38,721 INFO L82 PathProgramCache]: Analyzing trace with hash -674876415, now seen corresponding path program 112 times [2021-06-05 16:36:38,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:38,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046932582] [2021-06-05 16:36:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:38,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:38,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046932582] [2021-06-05 16:36:38,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046932582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:38,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088013561] [2021-06-05 16:36:38,753 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 [2021-06-05 16:36:38,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:36:38,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:38,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:38,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:38,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088013561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:38,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:38,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:36:38,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731071431] [2021-06-05 16:36:38,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:36:38,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:38,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:36:38,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:36:38,849 INFO L87 Difference]: Start difference. First operand 13464 states and 51899 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) [2021-06-05 16:36:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:39,501 INFO L93 Difference]: Finished difference Result 20483 states and 74562 transitions. [2021-06-05 16:36:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:36:39,502 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 [2021-06-05 16:36:39,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:39,542 INFO L225 Difference]: With dead ends: 20483 [2021-06-05 16:36:39,542 INFO L226 Difference]: Without dead ends: 20483 [2021-06-05 16:36:39,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:36:39,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20483 states. [2021-06-05 16:36:39,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20483 to 14177. [2021-06-05 16:36:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14177 states, 14176 states have (on average 3.8409988713318284) internal successors, (54450), 14176 states have internal predecessors, (54450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:39,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14177 states to 14177 states and 54450 transitions. [2021-06-05 16:36:39,844 INFO L78 Accepts]: Start accepts. Automaton has 14177 states and 54450 transitions. Word has length 28 [2021-06-05 16:36:39,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:39,844 INFO L482 AbstractCegarLoop]: Abstraction has 14177 states and 54450 transitions. [2021-06-05 16:36:39,844 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) [2021-06-05 16:36:39,844 INFO L276 IsEmpty]: Start isEmpty. Operand 14177 states and 54450 transitions. [2021-06-05 16:36:39,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:39,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:39,865 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:40,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4082 [2021-06-05 16:36:40,065 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:40,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:40,066 INFO L82 PathProgramCache]: Analyzing trace with hash 78789957, now seen corresponding path program 113 times [2021-06-05 16:36:40,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:40,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520021378] [2021-06-05 16:36:40,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:40,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:40,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520021378] [2021-06-05 16:36:40,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520021378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:40,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828873850] [2021-06-05 16:36:40,098 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 [2021-06-05 16:36:40,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:36:40,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:40,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:40,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:40,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828873850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:40,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:40,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:36:40,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633375612] [2021-06-05 16:36:40,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:36:40,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:40,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:36:40,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:36:40,199 INFO L87 Difference]: Start difference. First operand 14177 states and 54450 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) [2021-06-05 16:36:41,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:41,019 INFO L93 Difference]: Finished difference Result 22983 states and 82487 transitions. [2021-06-05 16:36:41,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:36:41,020 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 [2021-06-05 16:36:41,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:41,064 INFO L225 Difference]: With dead ends: 22983 [2021-06-05 16:36:41,064 INFO L226 Difference]: Without dead ends: 22983 [2021-06-05 16:36:41,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:36:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22983 states. [2021-06-05 16:36:41,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22983 to 14420. [2021-06-05 16:36:41,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14420 states, 14419 states have (on average 3.8541507732852485) internal successors, (55573), 14419 states have internal predecessors, (55573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14420 states to 14420 states and 55573 transitions. [2021-06-05 16:36:41,388 INFO L78 Accepts]: Start accepts. Automaton has 14420 states and 55573 transitions. Word has length 28 [2021-06-05 16:36:41,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:41,388 INFO L482 AbstractCegarLoop]: Abstraction has 14420 states and 55573 transitions. [2021-06-05 16:36:41,388 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) [2021-06-05 16:36:41,388 INFO L276 IsEmpty]: Start isEmpty. Operand 14420 states and 55573 transitions. [2021-06-05 16:36:41,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:41,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:41,409 INFO L521 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] [2021-06-05 16:36:41,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4083,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:41,610 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:41,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:41,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1952101299, now seen corresponding path program 76 times [2021-06-05 16:36:41,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:41,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685281960] [2021-06-05 16:36:41,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:41,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:41,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685281960] [2021-06-05 16:36:41,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685281960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:41,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972549001] [2021-06-05 16:36:41,647 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 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 [2021-06-05 16:36:41,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:36:41,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:41,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:41,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:41,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972549001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:41,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:41,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:36:41,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781174827] [2021-06-05 16:36:41,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:41,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:41,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:41,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:41,774 INFO L87 Difference]: Start difference. First operand 14420 states and 55573 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) [2021-06-05 16:36:43,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:43,465 INFO L93 Difference]: Finished difference Result 39692 states and 142842 transitions. [2021-06-05 16:36:43,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:36:43,465 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 [2021-06-05 16:36:43,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:43,563 INFO L225 Difference]: With dead ends: 39692 [2021-06-05 16:36:43,563 INFO L226 Difference]: Without dead ends: 39692 [2021-06-05 16:36:43,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 1001.1ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:36:43,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39692 states. [2021-06-05 16:36:44,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39692 to 15659. [2021-06-05 16:36:44,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15659 states, 15658 states have (on average 3.899093115340401) internal successors, (61052), 15658 states have internal predecessors, (61052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:44,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15659 states to 15659 states and 61052 transitions. [2021-06-05 16:36:44,133 INFO L78 Accepts]: Start accepts. Automaton has 15659 states and 61052 transitions. Word has length 28 [2021-06-05 16:36:44,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:44,133 INFO L482 AbstractCegarLoop]: Abstraction has 15659 states and 61052 transitions. [2021-06-05 16:36:44,133 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) [2021-06-05 16:36:44,133 INFO L276 IsEmpty]: Start isEmpty. Operand 15659 states and 61052 transitions. [2021-06-05 16:36:44,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:44,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:44,157 INFO L521 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] [2021-06-05 16:36:44,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4084 [2021-06-05 16:36:44,361 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:44,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:44,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1385149219, now seen corresponding path program 77 times [2021-06-05 16:36:44,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:44,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712912233] [2021-06-05 16:36:44,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:44,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:44,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712912233] [2021-06-05 16:36:44,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712912233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:44,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265134367] [2021-06-05 16:36:44,396 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 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 [2021-06-05 16:36:44,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:36:44,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:44,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:44,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:44,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265134367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:44,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:44,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:36:44,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968009105] [2021-06-05 16:36:44,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:44,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:44,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:44,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:44,522 INFO L87 Difference]: Start difference. First operand 15659 states and 61052 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) [2021-06-05 16:36:45,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:45,972 INFO L93 Difference]: Finished difference Result 38708 states and 140253 transitions. [2021-06-05 16:36:45,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:36:45,972 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 [2021-06-05 16:36:45,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:46,064 INFO L225 Difference]: With dead ends: 38708 [2021-06-05 16:36:46,064 INFO L226 Difference]: Without dead ends: 38708 [2021-06-05 16:36:46,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 890.7ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:36:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38708 states. [2021-06-05 16:36:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38708 to 15633. [2021-06-05 16:36:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15633 states, 15632 states have (on average 3.895598771750256) internal successors, (60896), 15632 states have internal predecessors, (60896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:46,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15633 states to 15633 states and 60896 transitions. [2021-06-05 16:36:46,652 INFO L78 Accepts]: Start accepts. Automaton has 15633 states and 60896 transitions. Word has length 28 [2021-06-05 16:36:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:46,652 INFO L482 AbstractCegarLoop]: Abstraction has 15633 states and 60896 transitions. [2021-06-05 16:36:46,652 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) [2021-06-05 16:36:46,652 INFO L276 IsEmpty]: Start isEmpty. Operand 15633 states and 60896 transitions. [2021-06-05 16:36:46,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:46,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:46,675 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:46,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4085 [2021-06-05 16:36:46,875 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:46,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1667375567, now seen corresponding path program 114 times [2021-06-05 16:36:46,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:46,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461055790] [2021-06-05 16:36:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:46,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:46,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461055790] [2021-06-05 16:36:46,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461055790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:46,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528629787] [2021-06-05 16:36:46,917 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 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 [2021-06-05 16:36:46,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:36:46,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:46,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:46,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:46,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528629787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:46,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:46,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:36:46,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609923397] [2021-06-05 16:36:46,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:36:46,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:46,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:36:46,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:36:46,998 INFO L87 Difference]: Start difference. First operand 15633 states and 60896 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) [2021-06-05 16:36:47,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:47,280 INFO L93 Difference]: Finished difference Result 24061 states and 92296 transitions. [2021-06-05 16:36:47,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:36:47,280 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 [2021-06-05 16:36:47,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:47,331 INFO L225 Difference]: With dead ends: 24061 [2021-06-05 16:36:47,331 INFO L226 Difference]: Without dead ends: 24014 [2021-06-05 16:36:47,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:36:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24014 states. [2021-06-05 16:36:47,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24014 to 20722. [2021-06-05 16:36:47,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20722 states, 20721 states have (on average 3.9071473384489166) internal successors, (80960), 20721 states have internal predecessors, (80960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:47,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20722 states to 20722 states and 80960 transitions. [2021-06-05 16:36:47,727 INFO L78 Accepts]: Start accepts. Automaton has 20722 states and 80960 transitions. Word has length 28 [2021-06-05 16:36:47,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:47,727 INFO L482 AbstractCegarLoop]: Abstraction has 20722 states and 80960 transitions. [2021-06-05 16:36:47,727 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) [2021-06-05 16:36:47,727 INFO L276 IsEmpty]: Start isEmpty. Operand 20722 states and 80960 transitions. [2021-06-05 16:36:47,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:47,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:47,758 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:47,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4086,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:47,959 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:47,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:47,959 INFO L82 PathProgramCache]: Analyzing trace with hash 242691175, now seen corresponding path program 115 times [2021-06-05 16:36:47,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:47,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759437528] [2021-06-05 16:36:47,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:47,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:47,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759437528] [2021-06-05 16:36:47,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759437528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:47,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104715495] [2021-06-05 16:36:47,987 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 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 [2021-06-05 16:36:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:48,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:48,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:48,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104715495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:48,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:48,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:36:48,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149573451] [2021-06-05 16:36:48,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:36:48,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:48,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:36:48,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:36:48,072 INFO L87 Difference]: Start difference. First operand 20722 states and 80960 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) [2021-06-05 16:36:48,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:48,309 INFO L93 Difference]: Finished difference Result 23493 states and 89383 transitions. [2021-06-05 16:36:48,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:36:48,310 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 [2021-06-05 16:36:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:48,358 INFO L225 Difference]: With dead ends: 23493 [2021-06-05 16:36:48,358 INFO L226 Difference]: Without dead ends: 23493 [2021-06-05 16:36:48,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:36:48,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23493 states. [2021-06-05 16:36:48,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23493 to 20225. [2021-06-05 16:36:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20225 states, 20224 states have (on average 3.895767405063291) internal successors, (78788), 20224 states have internal predecessors, (78788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:48,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20225 states to 20225 states and 78788 transitions. [2021-06-05 16:36:48,746 INFO L78 Accepts]: Start accepts. Automaton has 20225 states and 78788 transitions. Word has length 28 [2021-06-05 16:36:48,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:48,746 INFO L482 AbstractCegarLoop]: Abstraction has 20225 states and 78788 transitions. [2021-06-05 16:36:48,746 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) [2021-06-05 16:36:48,746 INFO L276 IsEmpty]: Start isEmpty. Operand 20225 states and 78788 transitions. [2021-06-05 16:36:48,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:48,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:48,776 INFO L521 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] [2021-06-05 16:36:48,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4087 [2021-06-05 16:36:48,976 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:48,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:48,976 INFO L82 PathProgramCache]: Analyzing trace with hash -708990263, now seen corresponding path program 116 times [2021-06-05 16:36:48,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:48,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521060915] [2021-06-05 16:36:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:49,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:49,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521060915] [2021-06-05 16:36:49,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521060915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:49,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210597166] [2021-06-05 16:36:49,015 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 [2021-06-05 16:36:49,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:36:49,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:49,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:49,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:36:49,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210597166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:49,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:49,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 16:36:49,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974120420] [2021-06-05 16:36:49,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:36:49,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:49,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:36:49,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:36:49,123 INFO L87 Difference]: Start difference. First operand 20225 states and 78788 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) [2021-06-05 16:36:50,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:50,118 INFO L93 Difference]: Finished difference Result 32091 states and 118994 transitions. [2021-06-05 16:36:50,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:36:50,118 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 [2021-06-05 16:36:50,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:50,189 INFO L225 Difference]: With dead ends: 32091 [2021-06-05 16:36:50,190 INFO L226 Difference]: Without dead ends: 32091 [2021-06-05 16:36:50,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 484.2ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:36:50,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32091 states. [2021-06-05 16:36:50,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32091 to 20291. [2021-06-05 16:36:50,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20291 states, 20290 states have (on average 3.8938393297190736) internal successors, (79006), 20290 states have internal predecessors, (79006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:50,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20291 states to 20291 states and 79006 transitions. [2021-06-05 16:36:50,678 INFO L78 Accepts]: Start accepts. Automaton has 20291 states and 79006 transitions. Word has length 28 [2021-06-05 16:36:50,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:50,679 INFO L482 AbstractCegarLoop]: Abstraction has 20291 states and 79006 transitions. [2021-06-05 16:36:50,679 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) [2021-06-05 16:36:50,679 INFO L276 IsEmpty]: Start isEmpty. Operand 20291 states and 79006 transitions. [2021-06-05 16:36:50,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:50,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:50,709 INFO L521 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] [2021-06-05 16:36:50,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4088 [2021-06-05 16:36:50,909 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:50,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:50,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1685309107, now seen corresponding path program 117 times [2021-06-05 16:36:50,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:50,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240524007] [2021-06-05 16:36:50,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:50,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:50,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240524007] [2021-06-05 16:36:50,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240524007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:50,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333572709] [2021-06-05 16:36:50,947 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 [2021-06-05 16:36:50,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:36:50,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:50,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:50,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:36:51,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333572709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:51,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:51,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:36:51,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626005136] [2021-06-05 16:36:51,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:51,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:51,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:51,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:51,063 INFO L87 Difference]: Start difference. First operand 20291 states and 79006 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) [2021-06-05 16:36:52,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:52,537 INFO L93 Difference]: Finished difference Result 40978 states and 150264 transitions. [2021-06-05 16:36:52,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 16:36:52,537 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 [2021-06-05 16:36:52,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:52,628 INFO L225 Difference]: With dead ends: 40978 [2021-06-05 16:36:52,628 INFO L226 Difference]: Without dead ends: 40978 [2021-06-05 16:36:52,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 860.8ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 16:36:52,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40978 states. [2021-06-05 16:36:53,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40978 to 20294. [2021-06-05 16:36:53,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20294 states, 20293 states have (on average 3.895924703099591) internal successors, (79060), 20293 states have internal predecessors, (79060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:53,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20294 states to 20294 states and 79060 transitions. [2021-06-05 16:36:53,304 INFO L78 Accepts]: Start accepts. Automaton has 20294 states and 79060 transitions. Word has length 28 [2021-06-05 16:36:53,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:53,304 INFO L482 AbstractCegarLoop]: Abstraction has 20294 states and 79060 transitions. [2021-06-05 16:36:53,305 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) [2021-06-05 16:36:53,305 INFO L276 IsEmpty]: Start isEmpty. Operand 20294 states and 79060 transitions. [2021-06-05 16:36:53,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:53,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:53,334 INFO L521 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] [2021-06-05 16:36:53,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-06-05 16:36:53,534 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:53,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:53,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1118357027, now seen corresponding path program 118 times [2021-06-05 16:36:53,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:53,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420596363] [2021-06-05 16:36:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:53,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:53,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420596363] [2021-06-05 16:36:53,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420596363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:53,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833884255] [2021-06-05 16:36:53,571 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 [2021-06-05 16:36:53,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:36:53,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:53,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:53,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:36:53,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833884255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:53,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:53,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:36:53,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572297413] [2021-06-05 16:36:53,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:53,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:53,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:53,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:53,686 INFO L87 Difference]: Start difference. First operand 20294 states and 79060 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) [2021-06-05 16:36:55,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:55,089 INFO L93 Difference]: Finished difference Result 40582 states and 149545 transitions. [2021-06-05 16:36:55,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:36:55,089 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 [2021-06-05 16:36:55,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:55,187 INFO L225 Difference]: With dead ends: 40582 [2021-06-05 16:36:55,187 INFO L226 Difference]: Without dead ends: 40582 [2021-06-05 16:36:55,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 851.2ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 16:36:55,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40582 states. [2021-06-05 16:36:55,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40582 to 20081. [2021-06-05 16:36:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20081 states, 20080 states have (on average 3.888147410358566) internal successors, (78074), 20080 states have internal predecessors, (78074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:55,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20081 states to 20081 states and 78074 transitions. [2021-06-05 16:36:55,771 INFO L78 Accepts]: Start accepts. Automaton has 20081 states and 78074 transitions. Word has length 28 [2021-06-05 16:36:55,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:55,771 INFO L482 AbstractCegarLoop]: Abstraction has 20081 states and 78074 transitions. [2021-06-05 16:36:55,771 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) [2021-06-05 16:36:55,772 INFO L276 IsEmpty]: Start isEmpty. Operand 20081 states and 78074 transitions. [2021-06-05 16:36:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:55,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:55,800 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:56,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4090,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:56,001 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:56,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:56,001 INFO L82 PathProgramCache]: Analyzing trace with hash -182218355, now seen corresponding path program 119 times [2021-06-05 16:36:56,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:56,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328920436] [2021-06-05 16:36:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:36:56,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:56,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328920436] [2021-06-05 16:36:56,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328920436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:56,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066827716] [2021-06-05 16:36:56,029 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 [2021-06-05 16:36:56,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:36:56,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:56,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:36:56,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:36:56,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066827716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:56,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:56,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 16:36:56,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517736247] [2021-06-05 16:36:56,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:36:56,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:56,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:36:56,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:36:56,111 INFO L87 Difference]: Start difference. First operand 20081 states and 78074 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) [2021-06-05 16:36:56,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:56,384 INFO L93 Difference]: Finished difference Result 29766 states and 111237 transitions. [2021-06-05 16:36:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:36:56,384 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 [2021-06-05 16:36:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:56,456 INFO L225 Difference]: With dead ends: 29766 [2021-06-05 16:36:56,456 INFO L226 Difference]: Without dead ends: 29749 [2021-06-05 16:36:56,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:36:56,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29749 states. [2021-06-05 16:36:56,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29749 to 20349. [2021-06-05 16:36:56,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20349 states, 20348 states have (on average 3.8934047572242974) internal successors, (79223), 20348 states have internal predecessors, (79223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20349 states to 20349 states and 79223 transitions. [2021-06-05 16:36:56,987 INFO L78 Accepts]: Start accepts. Automaton has 20349 states and 79223 transitions. Word has length 28 [2021-06-05 16:36:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:56,987 INFO L482 AbstractCegarLoop]: Abstraction has 20349 states and 79223 transitions. [2021-06-05 16:36:56,987 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) [2021-06-05 16:36:56,987 INFO L276 IsEmpty]: Start isEmpty. Operand 20349 states and 79223 transitions. [2021-06-05 16:36:57,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:57,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:57,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:57,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4091 [2021-06-05 16:36:57,217 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:57,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:57,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1325144395, now seen corresponding path program 120 times [2021-06-05 16:36:57,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:57,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388923929] [2021-06-05 16:36:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:36:57,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:57,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388923929] [2021-06-05 16:36:57,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388923929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:57,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869077198] [2021-06-05 16:36:57,245 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 [2021-06-05 16:36:57,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:36:57,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:57,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:36:57,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:36:57,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869077198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:57,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:57,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 16:36:57,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722116419] [2021-06-05 16:36:57,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:36:57,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:57,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:36:57,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:36:57,349 INFO L87 Difference]: Start difference. First operand 20349 states and 79223 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) [2021-06-05 16:36:57,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:57,641 INFO L93 Difference]: Finished difference Result 31558 states and 116818 transitions. [2021-06-05 16:36:57,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:36:57,641 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 [2021-06-05 16:36:57,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:57,711 INFO L225 Difference]: With dead ends: 31558 [2021-06-05 16:36:57,712 INFO L226 Difference]: Without dead ends: 31558 [2021-06-05 16:36:57,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:36:57,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31558 states. [2021-06-05 16:36:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31558 to 20016. [2021-06-05 16:36:58,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20016 states, 20015 states have (on average 3.8783912065950537) internal successors, (77626), 20015 states have internal predecessors, (77626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20016 states to 20016 states and 77626 transitions. [2021-06-05 16:36:58,156 INFO L78 Accepts]: Start accepts. Automaton has 20016 states and 77626 transitions. Word has length 28 [2021-06-05 16:36:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:58,156 INFO L482 AbstractCegarLoop]: Abstraction has 20016 states and 77626 transitions. [2021-06-05 16:36:58,156 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) [2021-06-05 16:36:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 20016 states and 77626 transitions. [2021-06-05 16:36:58,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:58,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:58,184 INFO L521 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] [2021-06-05 16:36:58,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4092,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:58,385 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:58,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:58,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1623141335, now seen corresponding path program 121 times [2021-06-05 16:36:58,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:58,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008215580] [2021-06-05 16:36:58,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:58,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:58,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:58,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008215580] [2021-06-05 16:36:58,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008215580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:58,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936548824] [2021-06-05 16:36:58,422 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 [2021-06-05 16:36:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:58,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:58,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:36:58,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936548824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:58,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:58,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:36:58,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896001919] [2021-06-05 16:36:58,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:36:58,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:58,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:36:58,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:36:58,519 INFO L87 Difference]: Start difference. First operand 20016 states and 77626 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) [2021-06-05 16:36:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:59,311 INFO L93 Difference]: Finished difference Result 29601 states and 110146 transitions. [2021-06-05 16:36:59,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:36:59,312 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 [2021-06-05 16:36:59,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:59,379 INFO L225 Difference]: With dead ends: 29601 [2021-06-05 16:36:59,380 INFO L226 Difference]: Without dead ends: 29601 [2021-06-05 16:36:59,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:36:59,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29601 states. [2021-06-05 16:36:59,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29601 to 20064. [2021-06-05 16:36:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20064 states, 20063 states have (on average 3.8771868613866323) internal successors, (77788), 20063 states have internal predecessors, (77788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20064 states to 20064 states and 77788 transitions. [2021-06-05 16:36:59,947 INFO L78 Accepts]: Start accepts. Automaton has 20064 states and 77788 transitions. Word has length 28 [2021-06-05 16:36:59,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:59,947 INFO L482 AbstractCegarLoop]: Abstraction has 20064 states and 77788 transitions. [2021-06-05 16:36:59,947 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) [2021-06-05 16:36:59,947 INFO L276 IsEmpty]: Start isEmpty. Operand 20064 states and 77788 transitions. [2021-06-05 16:36:59,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:59,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:59,976 INFO L521 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] [2021-06-05 16:37:00,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4093,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:00,177 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:00,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:00,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1886911867, now seen corresponding path program 122 times [2021-06-05 16:37:00,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:00,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890924237] [2021-06-05 16:37:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:00,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:00,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890924237] [2021-06-05 16:37:00,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890924237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:00,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732539648] [2021-06-05 16:37:00,218 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 [2021-06-05 16:37:00,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:37:00,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:00,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:00,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:37:00,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732539648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:00,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:00,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:37:00,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762845116] [2021-06-05 16:37:00,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:37:00,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:00,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:37:00,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:37:00,315 INFO L87 Difference]: Start difference. First operand 20064 states and 77788 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) [2021-06-05 16:37:01,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:01,308 INFO L93 Difference]: Finished difference Result 31138 states and 114558 transitions. [2021-06-05 16:37:01,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:37:01,308 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 [2021-06-05 16:37:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:01,379 INFO L225 Difference]: With dead ends: 31138 [2021-06-05 16:37:01,379 INFO L226 Difference]: Without dead ends: 31138 [2021-06-05 16:37:01,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 553.0ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:37:01,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31138 states. [2021-06-05 16:37:01,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31138 to 20620. [2021-06-05 16:37:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20620 states, 20619 states have (on average 3.855958096900917) internal successors, (79506), 20619 states have internal predecessors, (79506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20620 states to 20620 states and 79506 transitions. [2021-06-05 16:37:01,884 INFO L78 Accepts]: Start accepts. Automaton has 20620 states and 79506 transitions. Word has length 28 [2021-06-05 16:37:01,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:01,884 INFO L482 AbstractCegarLoop]: Abstraction has 20620 states and 79506 transitions. [2021-06-05 16:37:01,884 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) [2021-06-05 16:37:01,884 INFO L276 IsEmpty]: Start isEmpty. Operand 20620 states and 79506 transitions. [2021-06-05 16:37:01,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:01,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:01,914 INFO L521 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] [2021-06-05 16:37:02,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4094 [2021-06-05 16:37:02,114 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:02,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:02,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1931733009, now seen corresponding path program 123 times [2021-06-05 16:37:02,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:02,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052468509] [2021-06-05 16:37:02,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:02,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:02,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052468509] [2021-06-05 16:37:02,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052468509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:02,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437641839] [2021-06-05 16:37:02,162 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 [2021-06-05 16:37:02,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:37:02,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:02,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:02,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:37:02,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437641839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:02,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:02,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:37:02,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651244566] [2021-06-05 16:37:02,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:37:02,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:02,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:37:02,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:37:02,254 INFO L87 Difference]: Start difference. First operand 20620 states and 79506 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) [2021-06-05 16:37:03,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:03,078 INFO L93 Difference]: Finished difference Result 30264 states and 112255 transitions. [2021-06-05 16:37:03,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:37:03,078 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 [2021-06-05 16:37:03,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:03,148 INFO L225 Difference]: With dead ends: 30264 [2021-06-05 16:37:03,148 INFO L226 Difference]: Without dead ends: 30260 [2021-06-05 16:37:03,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 449.2ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:37:03,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30260 states. [2021-06-05 16:37:03,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30260 to 20512. [2021-06-05 16:37:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20512 states, 20511 states have (on average 3.858612451855102) internal successors, (79144), 20511 states have internal predecessors, (79144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20512 states to 20512 states and 79144 transitions. [2021-06-05 16:37:03,802 INFO L78 Accepts]: Start accepts. Automaton has 20512 states and 79144 transitions. Word has length 28 [2021-06-05 16:37:03,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:03,802 INFO L482 AbstractCegarLoop]: Abstraction has 20512 states and 79144 transitions. [2021-06-05 16:37:03,802 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) [2021-06-05 16:37:03,802 INFO L276 IsEmpty]: Start isEmpty. Operand 20512 states and 79144 transitions. [2021-06-05 16:37:03,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:03,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:03,836 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:04,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4095,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:04,036 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:04,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:04,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1066349071, now seen corresponding path program 124 times [2021-06-05 16:37:04,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:04,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336223275] [2021-06-05 16:37:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:37:04,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:04,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336223275] [2021-06-05 16:37:04,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336223275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:04,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331048681] [2021-06-05 16:37:04,067 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 [2021-06-05 16:37:04,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:37:04,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:04,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:37:04,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:37:04,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331048681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:04,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:04,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 16:37:04,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748178681] [2021-06-05 16:37:04,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:37:04,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:04,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:37:04,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:37:04,149 INFO L87 Difference]: Start difference. First operand 20512 states and 79144 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) [2021-06-05 16:37:04,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:04,402 INFO L93 Difference]: Finished difference Result 25599 states and 95352 transitions. [2021-06-05 16:37:04,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:37:04,402 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 [2021-06-05 16:37:04,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:04,461 INFO L225 Difference]: With dead ends: 25599 [2021-06-05 16:37:04,462 INFO L226 Difference]: Without dead ends: 25599 [2021-06-05 16:37:04,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:37:04,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25599 states. [2021-06-05 16:37:04,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25599 to 20822. [2021-06-05 16:37:04,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20822 states, 20821 states have (on average 3.8498150905335957) internal successors, (80157), 20821 states have internal predecessors, (80157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:04,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20822 states to 20822 states and 80157 transitions. [2021-06-05 16:37:04,890 INFO L78 Accepts]: Start accepts. Automaton has 20822 states and 80157 transitions. Word has length 28 [2021-06-05 16:37:04,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:04,890 INFO L482 AbstractCegarLoop]: Abstraction has 20822 states and 80157 transitions. [2021-06-05 16:37:04,890 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) [2021-06-05 16:37:04,890 INFO L276 IsEmpty]: Start isEmpty. Operand 20822 states and 80157 transitions. [2021-06-05 16:37:04,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:04,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:04,921 INFO L521 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] [2021-06-05 16:37:05,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4096 [2021-06-05 16:37:05,130 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:05,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:05,131 INFO L82 PathProgramCache]: Analyzing trace with hash -136149327, now seen corresponding path program 125 times [2021-06-05 16:37:05,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:05,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856110675] [2021-06-05 16:37:05,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:05,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:05,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856110675] [2021-06-05 16:37:05,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856110675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:05,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149447327] [2021-06-05 16:37:05,171 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 [2021-06-05 16:37:05,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:37:05,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:05,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:05,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:37:05,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149447327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:05,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:05,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:37:05,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624616298] [2021-06-05 16:37:05,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:37:05,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:05,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:37:05,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:37:05,258 INFO L87 Difference]: Start difference. First operand 20822 states and 80157 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) [2021-06-05 16:37:06,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:06,068 INFO L93 Difference]: Finished difference Result 31377 states and 115045 transitions. [2021-06-05 16:37:06,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:37:06,068 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 [2021-06-05 16:37:06,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:06,141 INFO L225 Difference]: With dead ends: 31377 [2021-06-05 16:37:06,141 INFO L226 Difference]: Without dead ends: 31377 [2021-06-05 16:37:06,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 439.3ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:37:06,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31377 states. [2021-06-05 16:37:06,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31377 to 22482. [2021-06-05 16:37:06,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22482 states, 22481 states have (on average 3.8615719941283753) internal successors, (86812), 22481 states have internal predecessors, (86812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:06,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22482 states to 22482 states and 86812 transitions. [2021-06-05 16:37:06,660 INFO L78 Accepts]: Start accepts. Automaton has 22482 states and 86812 transitions. Word has length 28 [2021-06-05 16:37:06,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:06,660 INFO L482 AbstractCegarLoop]: Abstraction has 22482 states and 86812 transitions. [2021-06-05 16:37:06,660 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) [2021-06-05 16:37:06,660 INFO L276 IsEmpty]: Start isEmpty. Operand 22482 states and 86812 transitions. [2021-06-05 16:37:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:06,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:06,694 INFO L521 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] [2021-06-05 16:37:06,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4097,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:06,894 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:06,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:06,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1975921655, now seen corresponding path program 126 times [2021-06-05 16:37:06,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:06,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856770936] [2021-06-05 16:37:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:06,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:06,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856770936] [2021-06-05 16:37:06,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856770936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:06,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324020880] [2021-06-05 16:37:06,938 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 [2021-06-05 16:37:06,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:37:06,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:06,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:06,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:37:07,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324020880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:07,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:07,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:37:07,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621818840] [2021-06-05 16:37:07,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:37:07,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:07,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:37:07,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:37:07,021 INFO L87 Difference]: Start difference. First operand 22482 states and 86812 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) [2021-06-05 16:37:07,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:07,818 INFO L93 Difference]: Finished difference Result 29625 states and 110530 transitions. [2021-06-05 16:37:07,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:37:07,818 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 [2021-06-05 16:37:07,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:07,886 INFO L225 Difference]: With dead ends: 29625 [2021-06-05 16:37:07,886 INFO L226 Difference]: Without dead ends: 29613 [2021-06-05 16:37:07,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:37:07,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29613 states. [2021-06-05 16:37:08,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29613 to 22654. [2021-06-05 16:37:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22654 states, 22653 states have (on average 3.8557365470357126) internal successors, (87344), 22653 states have internal predecessors, (87344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22654 states to 22654 states and 87344 transitions. [2021-06-05 16:37:08,399 INFO L78 Accepts]: Start accepts. Automaton has 22654 states and 87344 transitions. Word has length 28 [2021-06-05 16:37:08,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:08,400 INFO L482 AbstractCegarLoop]: Abstraction has 22654 states and 87344 transitions. [2021-06-05 16:37:08,400 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) [2021-06-05 16:37:08,400 INFO L276 IsEmpty]: Start isEmpty. Operand 22654 states and 87344 transitions. [2021-06-05 16:37:08,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:08,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:08,434 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:08,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4098 [2021-06-05 16:37:08,634 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:08,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:08,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1688262325, now seen corresponding path program 127 times [2021-06-05 16:37:08,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:08,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256984239] [2021-06-05 16:37:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:37:08,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:08,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256984239] [2021-06-05 16:37:08,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256984239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:08,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439721899] [2021-06-05 16:37:08,677 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 [2021-06-05 16:37:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:08,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:37:08,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:37:08,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439721899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:08,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:08,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:37:08,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128805170] [2021-06-05 16:37:08,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:37:08,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:08,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:37:08,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:37:08,768 INFO L87 Difference]: Start difference. First operand 22654 states and 87344 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) [2021-06-05 16:37:09,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:09,020 INFO L93 Difference]: Finished difference Result 26104 states and 98956 transitions. [2021-06-05 16:37:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:37:09,020 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 [2021-06-05 16:37:09,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:09,080 INFO L225 Difference]: With dead ends: 26104 [2021-06-05 16:37:09,080 INFO L226 Difference]: Without dead ends: 26104 [2021-06-05 16:37:09,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:37:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26104 states. [2021-06-05 16:37:09,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26104 to 23491. [2021-06-05 16:37:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23491 states, 23490 states have (on average 3.8498084291187737) internal successors, (90432), 23490 states have internal predecessors, (90432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23491 states to 23491 states and 90432 transitions. [2021-06-05 16:37:09,518 INFO L78 Accepts]: Start accepts. Automaton has 23491 states and 90432 transitions. Word has length 28 [2021-06-05 16:37:09,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:09,519 INFO L482 AbstractCegarLoop]: Abstraction has 23491 states and 90432 transitions. [2021-06-05 16:37:09,519 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) [2021-06-05 16:37:09,519 INFO L276 IsEmpty]: Start isEmpty. Operand 23491 states and 90432 transitions. [2021-06-05 16:37:09,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:09,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:09,553 INFO L521 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] [2021-06-05 16:37:09,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4099,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:09,753 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:09,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:09,753 INFO L82 PathProgramCache]: Analyzing trace with hash 2131923893, now seen corresponding path program 128 times [2021-06-05 16:37:09,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:09,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301929332] [2021-06-05 16:37:09,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:09,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:09,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301929332] [2021-06-05 16:37:09,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301929332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:09,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314854461] [2021-06-05 16:37:09,792 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 [2021-06-05 16:37:09,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:37:09,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:09,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:09,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:09,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314854461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:09,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:09,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:37:09,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245730855] [2021-06-05 16:37:09,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:37:09,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:09,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:37:09,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:37:09,900 INFO L87 Difference]: Start difference. First operand 23491 states and 90432 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) [2021-06-05 16:37:10,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:10,664 INFO L93 Difference]: Finished difference Result 31312 states and 115741 transitions. [2021-06-05 16:37:10,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:37:10,664 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 [2021-06-05 16:37:10,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:10,734 INFO L225 Difference]: With dead ends: 31312 [2021-06-05 16:37:10,734 INFO L226 Difference]: Without dead ends: 31312 [2021-06-05 16:37:10,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 419.7ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:37:10,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31312 states. [2021-06-05 16:37:11,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31312 to 24677. [2021-06-05 16:37:11,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24677 states, 24676 states have (on average 3.8184875992867564) internal successors, (94225), 24676 states have internal predecessors, (94225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24677 states to 24677 states and 94225 transitions. [2021-06-05 16:37:11,488 INFO L78 Accepts]: Start accepts. Automaton has 24677 states and 94225 transitions. Word has length 28 [2021-06-05 16:37:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:11,488 INFO L482 AbstractCegarLoop]: Abstraction has 24677 states and 94225 transitions. [2021-06-05 16:37:11,488 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) [2021-06-05 16:37:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 24677 states and 94225 transitions. [2021-06-05 16:37:11,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:11,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:11,522 INFO L521 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] [2021-06-05 16:37:11,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4100 [2021-06-05 16:37:11,723 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:11,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:11,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1422950451, now seen corresponding path program 129 times [2021-06-05 16:37:11,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:11,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241488843] [2021-06-05 16:37:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:11,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:11,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241488843] [2021-06-05 16:37:11,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241488843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:11,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807593395] [2021-06-05 16:37:11,755 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 [2021-06-05 16:37:11,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:37:11,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:11,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:11,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:11,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807593395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:11,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:11,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:37:11,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57036033] [2021-06-05 16:37:11,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:37:11,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:11,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:37:11,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:37:11,834 INFO L87 Difference]: Start difference. First operand 24677 states and 94225 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) [2021-06-05 16:37:12,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:12,403 INFO L93 Difference]: Finished difference Result 30413 states and 113358 transitions. [2021-06-05 16:37:12,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:37:12,403 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 [2021-06-05 16:37:12,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:12,477 INFO L225 Difference]: With dead ends: 30413 [2021-06-05 16:37:12,477 INFO L226 Difference]: Without dead ends: 30405 [2021-06-05 16:37:12,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:37:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30405 states. [2021-06-05 16:37:12,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30405 to 24499. [2021-06-05 16:37:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24499 states, 24498 states have (on average 3.824557106702588) internal successors, (93694), 24498 states have internal predecessors, (93694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24499 states to 24499 states and 93694 transitions. [2021-06-05 16:37:12,974 INFO L78 Accepts]: Start accepts. Automaton has 24499 states and 93694 transitions. Word has length 28 [2021-06-05 16:37:12,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:12,974 INFO L482 AbstractCegarLoop]: Abstraction has 24499 states and 93694 transitions. [2021-06-05 16:37:12,974 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) [2021-06-05 16:37:12,974 INFO L276 IsEmpty]: Start isEmpty. Operand 24499 states and 93694 transitions. [2021-06-05 16:37:13,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:13,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:13,008 INFO L521 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] [2021-06-05 16:37:13,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4101 [2021-06-05 16:37:13,209 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:13,209 INFO L82 PathProgramCache]: Analyzing trace with hash 27046477, now seen corresponding path program 130 times [2021-06-05 16:37:13,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:13,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666985593] [2021-06-05 16:37:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:13,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:13,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666985593] [2021-06-05 16:37:13,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666985593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:13,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473183090] [2021-06-05 16:37:13,245 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 [2021-06-05 16:37:13,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:37:13,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:13,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:13,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:13,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473183090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:13,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:13,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:37:13,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10011984] [2021-06-05 16:37:13,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:37:13,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:13,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:37:13,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:37:13,330 INFO L87 Difference]: Start difference. First operand 24499 states and 93694 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) [2021-06-05 16:37:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:14,142 INFO L93 Difference]: Finished difference Result 32257 states and 118986 transitions. [2021-06-05 16:37:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:37:14,142 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 [2021-06-05 16:37:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:14,213 INFO L225 Difference]: With dead ends: 32257 [2021-06-05 16:37:14,213 INFO L226 Difference]: Without dead ends: 32257 [2021-06-05 16:37:14,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 465.5ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:37:14,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32257 states. [2021-06-05 16:37:14,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32257 to 25533. [2021-06-05 16:37:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25533 states, 25532 states have (on average 3.8001331662227793) internal successors, (97025), 25532 states have internal predecessors, (97025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:14,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25533 states to 25533 states and 97025 transitions. [2021-06-05 16:37:14,796 INFO L78 Accepts]: Start accepts. Automaton has 25533 states and 97025 transitions. Word has length 28 [2021-06-05 16:37:14,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:14,796 INFO L482 AbstractCegarLoop]: Abstraction has 25533 states and 97025 transitions. [2021-06-05 16:37:14,796 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) [2021-06-05 16:37:14,796 INFO L276 IsEmpty]: Start isEmpty. Operand 25533 states and 97025 transitions. [2021-06-05 16:37:14,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:14,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:14,834 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:15,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4102,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:15,034 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:15,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:15,034 INFO L82 PathProgramCache]: Analyzing trace with hash 415101939, now seen corresponding path program 131 times [2021-06-05 16:37:15,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:15,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049930247] [2021-06-05 16:37:15,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:15,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:15,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049930247] [2021-06-05 16:37:15,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049930247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:15,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898490536] [2021-06-05 16:37:15,067 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 [2021-06-05 16:37:15,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:37:15,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:15,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:37:15,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:15,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898490536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:15,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:15,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:37:15,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711792745] [2021-06-05 16:37:15,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:37:15,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:15,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:37:15,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:37:15,144 INFO L87 Difference]: Start difference. First operand 25533 states and 97025 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) [2021-06-05 16:37:15,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:15,505 INFO L93 Difference]: Finished difference Result 32571 states and 122068 transitions. [2021-06-05 16:37:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:37:15,505 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 [2021-06-05 16:37:15,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:15,721 INFO L225 Difference]: With dead ends: 32571 [2021-06-05 16:37:15,722 INFO L226 Difference]: Without dead ends: 32571 [2021-06-05 16:37:15,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:37:15,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32571 states. [2021-06-05 16:37:16,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32571 to 29359. [2021-06-05 16:37:16,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29359 states, 29358 states have (on average 3.814599087131276) internal successors, (111989), 29358 states have internal predecessors, (111989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:16,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29359 states to 29359 states and 111989 transitions. [2021-06-05 16:37:16,598 INFO L78 Accepts]: Start accepts. Automaton has 29359 states and 111989 transitions. Word has length 28 [2021-06-05 16:37:16,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:16,598 INFO L482 AbstractCegarLoop]: Abstraction has 29359 states and 111989 transitions. [2021-06-05 16:37:16,598 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) [2021-06-05 16:37:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 29359 states and 111989 transitions. [2021-06-05 16:37:16,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:16,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:16,786 INFO L521 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] [2021-06-05 16:37:16,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4103,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:16,987 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:16,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:16,987 INFO L82 PathProgramCache]: Analyzing trace with hash -17774665, now seen corresponding path program 132 times [2021-06-05 16:37:16,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:16,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573414599] [2021-06-05 16:37:16,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:17,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:17,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573414599] [2021-06-05 16:37:17,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573414599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:17,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020081728] [2021-06-05 16:37:17,020 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 [2021-06-05 16:37:17,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:37:17,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:17,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:17,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:17,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020081728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:17,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:17,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:37:17,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893004600] [2021-06-05 16:37:17,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:37:17,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:17,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:37:17,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:37:17,109 INFO L87 Difference]: Start difference. First operand 29359 states and 111989 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) [2021-06-05 16:37:17,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:17,775 INFO L93 Difference]: Finished difference Result 35770 states and 133277 transitions. [2021-06-05 16:37:17,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:37:17,776 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 [2021-06-05 16:37:17,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:17,864 INFO L225 Difference]: With dead ends: 35770 [2021-06-05 16:37:17,864 INFO L226 Difference]: Without dead ends: 35762 [2021-06-05 16:37:17,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:37:17,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35762 states. [2021-06-05 16:37:18,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35762 to 29325. [2021-06-05 16:37:18,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29325 states, 29324 states have (on average 3.8150320556540716) internal successors, (111872), 29324 states have internal predecessors, (111872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:18,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29325 states to 29325 states and 111872 transitions. [2021-06-05 16:37:18,749 INFO L78 Accepts]: Start accepts. Automaton has 29325 states and 111872 transitions. Word has length 28 [2021-06-05 16:37:18,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:18,749 INFO L482 AbstractCegarLoop]: Abstraction has 29325 states and 111872 transitions. [2021-06-05 16:37:18,750 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) [2021-06-05 16:37:18,750 INFO L276 IsEmpty]: Start isEmpty. Operand 29325 states and 111872 transitions. [2021-06-05 16:37:18,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:18,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:18,804 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:19,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4104,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:19,004 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:19,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:19,005 INFO L82 PathProgramCache]: Analyzing trace with hash -913595481, now seen corresponding path program 133 times [2021-06-05 16:37:19,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:19,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338371201] [2021-06-05 16:37:19,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:37:19,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:19,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338371201] [2021-06-05 16:37:19,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338371201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:19,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109208275] [2021-06-05 16:37:19,042 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 [2021-06-05 16:37:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:19,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:37:19,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:37:19,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109208275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:19,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:19,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:37:19,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533461311] [2021-06-05 16:37:19,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:37:19,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:19,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:37:19,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:37:19,191 INFO L87 Difference]: Start difference. First operand 29325 states and 111872 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) [2021-06-05 16:37:19,454 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2021-06-05 16:37:19,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:19,759 INFO L93 Difference]: Finished difference Result 32332 states and 121875 transitions. [2021-06-05 16:37:19,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:37:19,760 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 [2021-06-05 16:37:19,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:19,837 INFO L225 Difference]: With dead ends: 32332 [2021-06-05 16:37:19,837 INFO L226 Difference]: Without dead ends: 32332 [2021-06-05 16:37:19,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 305.9ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:37:19,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32332 states. [2021-06-05 16:37:20,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32332 to 29928. [2021-06-05 16:37:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29928 states, 29927 states have (on average 3.812978247067865) internal successors, (114111), 29927 states have internal predecessors, (114111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29928 states to 29928 states and 114111 transitions. [2021-06-05 16:37:20,594 INFO L78 Accepts]: Start accepts. Automaton has 29928 states and 114111 transitions. Word has length 28 [2021-06-05 16:37:20,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:20,594 INFO L482 AbstractCegarLoop]: Abstraction has 29928 states and 114111 transitions. [2021-06-05 16:37:20,594 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) [2021-06-05 16:37:20,594 INFO L276 IsEmpty]: Start isEmpty. Operand 29928 states and 114111 transitions. [2021-06-05 16:37:20,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:20,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:20,644 INFO L521 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] [2021-06-05 16:37:20,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:20,844 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:20,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:20,845 INFO L82 PathProgramCache]: Analyzing trace with hash 579561993, now seen corresponding path program 134 times [2021-06-05 16:37:20,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:20,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827599212] [2021-06-05 16:37:20,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:37:20,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:20,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827599212] [2021-06-05 16:37:20,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827599212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:20,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67493922] [2021-06-05 16:37:20,878 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 [2021-06-05 16:37:20,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:37:20,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:20,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:20,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:37:20,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67493922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:20,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:20,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:37:20,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433299927] [2021-06-05 16:37:20,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:37:20,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:20,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:37:20,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:37:20,961 INFO L87 Difference]: Start difference. First operand 29928 states and 114111 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) [2021-06-05 16:37:21,362 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 16:37:21,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:21,790 INFO L93 Difference]: Finished difference Result 36766 states and 136935 transitions. [2021-06-05 16:37:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:37:21,791 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 [2021-06-05 16:37:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:21,885 INFO L225 Difference]: With dead ends: 36766 [2021-06-05 16:37:21,885 INFO L226 Difference]: Without dead ends: 36742 [2021-06-05 16:37:21,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 450.3ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:37:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36742 states. [2021-06-05 16:37:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36742 to 30100. [2021-06-05 16:37:22,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30100 states, 30099 states have (on average 3.8089305292534634) internal successors, (114645), 30099 states have internal predecessors, (114645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:22,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30100 states to 30100 states and 114645 transitions. [2021-06-05 16:37:22,815 INFO L78 Accepts]: Start accepts. Automaton has 30100 states and 114645 transitions. Word has length 28 [2021-06-05 16:37:22,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:22,815 INFO L482 AbstractCegarLoop]: Abstraction has 30100 states and 114645 transitions. [2021-06-05 16:37:22,815 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) [2021-06-05 16:37:22,815 INFO L276 IsEmpty]: Start isEmpty. Operand 30100 states and 114645 transitions. [2021-06-05 16:37:22,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:22,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:22,866 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:23,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4106,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:23,067 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:23,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:23,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1271447701, now seen corresponding path program 135 times [2021-06-05 16:37:23,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:23,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452975208] [2021-06-05 16:37:23,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:23,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:23,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452975208] [2021-06-05 16:37:23,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452975208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:23,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691621084] [2021-06-05 16:37:23,105 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 [2021-06-05 16:37:23,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:37:23,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:23,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:37:23,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:23,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691621084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:23,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:23,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 16:37:23,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776712720] [2021-06-05 16:37:23,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:37:23,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:23,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:37:23,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:37:23,200 INFO L87 Difference]: Start difference. First operand 30100 states and 114645 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) [2021-06-05 16:37:23,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:23,847 INFO L93 Difference]: Finished difference Result 32808 states and 123611 transitions. [2021-06-05 16:37:23,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:37:23,848 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 [2021-06-05 16:37:23,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:23,934 INFO L225 Difference]: With dead ends: 32808 [2021-06-05 16:37:23,934 INFO L226 Difference]: Without dead ends: 32808 [2021-06-05 16:37:23,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:37:23,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32808 states. [2021-06-05 16:37:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32808 to 30021. [2021-06-05 16:37:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30021 states, 30020 states have (on average 3.8105929380413057) internal successors, (114394), 30020 states have internal predecessors, (114394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30021 states to 30021 states and 114394 transitions. [2021-06-05 16:37:24,706 INFO L78 Accepts]: Start accepts. Automaton has 30021 states and 114394 transitions. Word has length 28 [2021-06-05 16:37:24,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:24,706 INFO L482 AbstractCegarLoop]: Abstraction has 30021 states and 114394 transitions. [2021-06-05 16:37:24,706 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) [2021-06-05 16:37:24,706 INFO L276 IsEmpty]: Start isEmpty. Operand 30021 states and 114394 transitions. [2021-06-05 16:37:24,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:24,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:24,764 INFO L521 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] [2021-06-05 16:37:24,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4107,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:24,965 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:24,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:24,965 INFO L82 PathProgramCache]: Analyzing trace with hash -412931571, now seen corresponding path program 136 times [2021-06-05 16:37:24,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:24,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904701044] [2021-06-05 16:37:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:25,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:25,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904701044] [2021-06-05 16:37:25,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904701044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:25,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609259065] [2021-06-05 16:37:25,008 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 [2021-06-05 16:37:25,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:37:25,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:25,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:25,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:25,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609259065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:25,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:25,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:37:25,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146008407] [2021-06-05 16:37:25,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:37:25,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:25,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:37:25,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:37:25,100 INFO L87 Difference]: Start difference. First operand 30021 states and 114394 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) [2021-06-05 16:37:25,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:25,997 INFO L93 Difference]: Finished difference Result 36684 states and 136681 transitions. [2021-06-05 16:37:25,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:37:25,998 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 [2021-06-05 16:37:25,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:26,098 INFO L225 Difference]: With dead ends: 36684 [2021-06-05 16:37:26,098 INFO L226 Difference]: Without dead ends: 36644 [2021-06-05 16:37:26,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 507.0ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:37:26,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36644 states. [2021-06-05 16:37:26,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36644 to 30177. [2021-06-05 16:37:26,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30177 states, 30176 states have (on average 3.806733828207847) internal successors, (114872), 30176 states have internal predecessors, (114872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30177 states to 30177 states and 114872 transitions. [2021-06-05 16:37:26,926 INFO L78 Accepts]: Start accepts. Automaton has 30177 states and 114872 transitions. Word has length 28 [2021-06-05 16:37:26,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:26,926 INFO L482 AbstractCegarLoop]: Abstraction has 30177 states and 114872 transitions. [2021-06-05 16:37:26,926 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) [2021-06-05 16:37:26,926 INFO L276 IsEmpty]: Start isEmpty. Operand 30177 states and 114872 transitions. [2021-06-05 16:37:26,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:26,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:26,975 INFO L521 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] [2021-06-05 16:37:27,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4108,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:27,176 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:27,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1625942477, now seen corresponding path program 137 times [2021-06-05 16:37:27,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:27,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934543354] [2021-06-05 16:37:27,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:27,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:27,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934543354] [2021-06-05 16:37:27,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934543354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:27,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105414542] [2021-06-05 16:37:27,209 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 [2021-06-05 16:37:27,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:37:27,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:27,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:27,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:27,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105414542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:27,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:27,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:37:27,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633119407] [2021-06-05 16:37:27,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:37:27,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:27,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:37:27,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:37:27,337 INFO L87 Difference]: Start difference. First operand 30177 states and 114872 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) [2021-06-05 16:37:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:28,788 INFO L93 Difference]: Finished difference Result 68717 states and 253109 transitions. [2021-06-05 16:37:28,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:37:28,788 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 [2021-06-05 16:37:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:29,189 INFO L225 Difference]: With dead ends: 68717 [2021-06-05 16:37:29,189 INFO L226 Difference]: Without dead ends: 68717 [2021-06-05 16:37:29,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 679.5ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:37:29,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68717 states. [2021-06-05 16:37:30,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68717 to 37968. [2021-06-05 16:37:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37968 states, 37967 states have (on average 3.8875075723654753) internal successors, (147597), 37967 states have internal predecessors, (147597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37968 states to 37968 states and 147597 transitions. [2021-06-05 16:37:30,531 INFO L78 Accepts]: Start accepts. Automaton has 37968 states and 147597 transitions. Word has length 28 [2021-06-05 16:37:30,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:30,531 INFO L482 AbstractCegarLoop]: Abstraction has 37968 states and 147597 transitions. [2021-06-05 16:37:30,531 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) [2021-06-05 16:37:30,531 INFO L276 IsEmpty]: Start isEmpty. Operand 37968 states and 147597 transitions. [2021-06-05 16:37:30,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:30,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:30,591 INFO L521 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] [2021-06-05 16:37:30,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4109,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:30,792 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:30,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:30,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2102072739, now seen corresponding path program 138 times [2021-06-05 16:37:30,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:30,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79611062] [2021-06-05 16:37:30,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:30,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:30,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79611062] [2021-06-05 16:37:30,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79611062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:30,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128561935] [2021-06-05 16:37:30,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:37:30,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:37:30,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:30,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:30,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:30,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128561935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:30,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:30,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:37:30,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826013867] [2021-06-05 16:37:30,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:37:30,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:30,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:37:30,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:37:30,950 INFO L87 Difference]: Start difference. First operand 37968 states and 147597 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) [2021-06-05 16:37:31,297 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-06-05 16:37:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:32,411 INFO L93 Difference]: Finished difference Result 68090 states and 251448 transitions. [2021-06-05 16:37:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:37:32,412 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 [2021-06-05 16:37:32,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:32,583 INFO L225 Difference]: With dead ends: 68090 [2021-06-05 16:37:32,583 INFO L226 Difference]: Without dead ends: 68090 [2021-06-05 16:37:32,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 863.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:37:32,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68090 states. [2021-06-05 16:37:33,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68090 to 37965. [2021-06-05 16:37:33,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37965 states, 37964 states have (on average 3.8874460014750816) internal successors, (147583), 37964 states have internal predecessors, (147583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:34,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37965 states to 37965 states and 147583 transitions. [2021-06-05 16:37:34,105 INFO L78 Accepts]: Start accepts. Automaton has 37965 states and 147583 transitions. Word has length 28 [2021-06-05 16:37:34,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:34,106 INFO L482 AbstractCegarLoop]: Abstraction has 37965 states and 147583 transitions. [2021-06-05 16:37:34,106 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) [2021-06-05 16:37:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 37965 states and 147583 transitions. [2021-06-05 16:37:34,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:34,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:34,173 INFO L521 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] [2021-06-05 16:37:34,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4110 [2021-06-05 16:37:34,373 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:34,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:34,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1020548699, now seen corresponding path program 139 times [2021-06-05 16:37:34,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:34,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092007984] [2021-06-05 16:37:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:34,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:34,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092007984] [2021-06-05 16:37:34,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092007984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:34,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111984935] [2021-06-05 16:37:34,409 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 [2021-06-05 16:37:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:34,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:34,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:34,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111984935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:34,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:34,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:37:34,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695947148] [2021-06-05 16:37:34,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:37:34,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:34,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:37:34,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:37:34,537 INFO L87 Difference]: Start difference. First operand 37965 states and 147583 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) [2021-06-05 16:37:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:35,957 INFO L93 Difference]: Finished difference Result 63470 states and 235834 transitions. [2021-06-05 16:37:35,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:37:35,957 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 [2021-06-05 16:37:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:36,125 INFO L225 Difference]: With dead ends: 63470 [2021-06-05 16:37:36,125 INFO L226 Difference]: Without dead ends: 63470 [2021-06-05 16:37:36,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 641.4ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:37:36,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63470 states. [2021-06-05 16:37:37,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63470 to 37989. [2021-06-05 16:37:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37989 states, 37988 states have (on average 3.8877277034853113) internal successors, (147687), 37988 states have internal predecessors, (147687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:37,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37989 states to 37989 states and 147687 transitions. [2021-06-05 16:37:37,648 INFO L78 Accepts]: Start accepts. Automaton has 37989 states and 147687 transitions. Word has length 28 [2021-06-05 16:37:37,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:37,649 INFO L482 AbstractCegarLoop]: Abstraction has 37989 states and 147687 transitions. [2021-06-05 16:37:37,649 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) [2021-06-05 16:37:37,649 INFO L276 IsEmpty]: Start isEmpty. Operand 37989 states and 147687 transitions. [2021-06-05 16:37:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:37,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:37,711 INFO L521 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] [2021-06-05 16:37:37,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4111 [2021-06-05 16:37:37,913 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:37,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:37,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1101924787, now seen corresponding path program 140 times [2021-06-05 16:37:37,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:37,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480715210] [2021-06-05 16:37:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:37,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:37,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480715210] [2021-06-05 16:37:37,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480715210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:37,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746756596] [2021-06-05 16:37:37,945 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 [2021-06-05 16:37:37,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:37:37,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:37,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:37,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:38,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746756596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:38,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:38,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:37:38,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202989823] [2021-06-05 16:37:38,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:37:38,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:38,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:37:38,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:37:38,057 INFO L87 Difference]: Start difference. First operand 37989 states and 147687 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) [2021-06-05 16:37:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:39,351 INFO L93 Difference]: Finished difference Result 62601 states and 233589 transitions. [2021-06-05 16:37:39,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:37:39,352 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 [2021-06-05 16:37:39,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:39,534 INFO L225 Difference]: With dead ends: 62601 [2021-06-05 16:37:39,534 INFO L226 Difference]: Without dead ends: 62593 [2021-06-05 16:37:39,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 499.9ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:37:39,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62593 states. [2021-06-05 16:37:40,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62593 to 37989. [2021-06-05 16:37:40,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37989 states, 37988 states have (on average 3.8875697588712224) internal successors, (147681), 37988 states have internal predecessors, (147681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37989 states to 37989 states and 147681 transitions. [2021-06-05 16:37:40,951 INFO L78 Accepts]: Start accepts. Automaton has 37989 states and 147681 transitions. Word has length 28 [2021-06-05 16:37:40,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:40,951 INFO L482 AbstractCegarLoop]: Abstraction has 37989 states and 147681 transitions. [2021-06-05 16:37:40,951 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) [2021-06-05 16:37:40,951 INFO L276 IsEmpty]: Start isEmpty. Operand 37989 states and 147681 transitions. [2021-06-05 16:37:41,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:41,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:41,010 INFO L521 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] [2021-06-05 16:37:41,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-06-05 16:37:41,210 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:41,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2032582003, now seen corresponding path program 141 times [2021-06-05 16:37:41,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:41,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989763356] [2021-06-05 16:37:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:41,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:41,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989763356] [2021-06-05 16:37:41,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989763356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:41,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252014776] [2021-06-05 16:37:41,242 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 [2021-06-05 16:37:41,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:37:41,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:41,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:41,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:41,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252014776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:41,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:41,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:37:41,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519057279] [2021-06-05 16:37:41,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:37:41,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:41,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:37:41,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:37:41,368 INFO L87 Difference]: Start difference. First operand 37989 states and 147681 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) [2021-06-05 16:37:42,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:42,793 INFO L93 Difference]: Finished difference Result 62283 states and 232726 transitions. [2021-06-05 16:37:42,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:37:42,793 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 [2021-06-05 16:37:42,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:42,957 INFO L225 Difference]: With dead ends: 62283 [2021-06-05 16:37:42,957 INFO L226 Difference]: Without dead ends: 62283 [2021-06-05 16:37:42,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 603.7ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:37:43,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62283 states. [2021-06-05 16:37:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62283 to 37997. [2021-06-05 16:37:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37997 states, 37996 states have (on average 3.8876460680071587) internal successors, (147715), 37996 states have internal predecessors, (147715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37997 states to 37997 states and 147715 transitions. [2021-06-05 16:37:44,553 INFO L78 Accepts]: Start accepts. Automaton has 37997 states and 147715 transitions. Word has length 28 [2021-06-05 16:37:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:44,553 INFO L482 AbstractCegarLoop]: Abstraction has 37997 states and 147715 transitions. [2021-06-05 16:37:44,553 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) [2021-06-05 16:37:44,554 INFO L276 IsEmpty]: Start isEmpty. Operand 37997 states and 147715 transitions. [2021-06-05 16:37:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:44,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:44,653 INFO L521 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] [2021-06-05 16:37:44,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4113,219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:44,853 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:44,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:44,853 INFO L82 PathProgramCache]: Analyzing trace with hash -619346139, now seen corresponding path program 142 times [2021-06-05 16:37:44,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:44,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760172691] [2021-06-05 16:37:44,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:44,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:44,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760172691] [2021-06-05 16:37:44,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760172691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:44,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182711579] [2021-06-05 16:37:44,888 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 [2021-06-05 16:37:44,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:37:44,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:44,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:44,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:45,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182711579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:45,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:45,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:37:45,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327424569] [2021-06-05 16:37:45,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:37:45,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:45,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:37:45,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:37:45,017 INFO L87 Difference]: Start difference. First operand 37997 states and 147715 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) [2021-06-05 16:37:46,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:46,160 INFO L93 Difference]: Finished difference Result 62072 states and 232200 transitions. [2021-06-05 16:37:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:37:46,160 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 [2021-06-05 16:37:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:46,337 INFO L225 Difference]: With dead ends: 62072 [2021-06-05 16:37:46,337 INFO L226 Difference]: Without dead ends: 62064 [2021-06-05 16:37:46,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 542.1ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:37:46,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62064 states. [2021-06-05 16:37:47,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62064 to 37997. [2021-06-05 16:37:47,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37997 states, 37996 states have (on average 3.887593430887462) internal successors, (147713), 37996 states have internal predecessors, (147713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37997 states to 37997 states and 147713 transitions. [2021-06-05 16:37:47,878 INFO L78 Accepts]: Start accepts. Automaton has 37997 states and 147713 transitions. Word has length 28 [2021-06-05 16:37:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:47,878 INFO L482 AbstractCegarLoop]: Abstraction has 37997 states and 147713 transitions. [2021-06-05 16:37:47,878 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) [2021-06-05 16:37:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand 37997 states and 147713 transitions. [2021-06-05 16:37:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:47,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:47,940 INFO L521 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] [2021-06-05 16:37:48,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4114,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:48,140 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:48,141 INFO L82 PathProgramCache]: Analyzing trace with hash 384081845, now seen corresponding path program 143 times [2021-06-05 16:37:48,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:48,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538871313] [2021-06-05 16:37:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:48,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:48,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538871313] [2021-06-05 16:37:48,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538871313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:48,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966098614] [2021-06-05 16:37:48,174 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 [2021-06-05 16:37:48,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:37:48,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:48,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:48,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:48,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966098614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:48,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:48,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:37:48,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540055471] [2021-06-05 16:37:48,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:37:48,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:48,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:37:48,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:37:48,280 INFO L87 Difference]: Start difference. First operand 37997 states and 147713 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) [2021-06-05 16:37:49,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:49,462 INFO L93 Difference]: Finished difference Result 61433 states and 228496 transitions. [2021-06-05 16:37:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:37:49,462 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 [2021-06-05 16:37:49,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:49,912 INFO L225 Difference]: With dead ends: 61433 [2021-06-05 16:37:49,912 INFO L226 Difference]: Without dead ends: 61433 [2021-06-05 16:37:49,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 623.7ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:37:49,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61433 states. [2021-06-05 16:37:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61433 to 40835. [2021-06-05 16:37:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40835 states, 40834 states have (on average 3.891022187392859) internal successors, (158886), 40834 states have internal predecessors, (158886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:51,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40835 states to 40835 states and 158886 transitions. [2021-06-05 16:37:51,250 INFO L78 Accepts]: Start accepts. Automaton has 40835 states and 158886 transitions. Word has length 28 [2021-06-05 16:37:51,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:51,250 INFO L482 AbstractCegarLoop]: Abstraction has 40835 states and 158886 transitions. [2021-06-05 16:37:51,250 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) [2021-06-05 16:37:51,250 INFO L276 IsEmpty]: Start isEmpty. Operand 40835 states and 158886 transitions. [2021-06-05 16:37:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:51,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:51,323 INFO L521 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] [2021-06-05 16:37:51,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4115,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:51,524 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:51,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:51,525 INFO L82 PathProgramCache]: Analyzing trace with hash 465457933, now seen corresponding path program 144 times [2021-06-05 16:37:51,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:51,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749636391] [2021-06-05 16:37:51,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:51,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:51,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749636391] [2021-06-05 16:37:51,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749636391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:51,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057000841] [2021-06-05 16:37:51,560 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 [2021-06-05 16:37:51,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:37:51,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:51,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:51,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:51,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057000841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:51,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:51,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:37:51,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241953669] [2021-06-05 16:37:51,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:37:51,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:51,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:37:51,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:37:51,668 INFO L87 Difference]: Start difference. First operand 40835 states and 158886 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) [2021-06-05 16:37:53,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:53,056 INFO L93 Difference]: Finished difference Result 60949 states and 227223 transitions. [2021-06-05 16:37:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:37:53,056 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 [2021-06-05 16:37:53,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:53,218 INFO L225 Difference]: With dead ends: 60949 [2021-06-05 16:37:53,218 INFO L226 Difference]: Without dead ends: 60941 [2021-06-05 16:37:53,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 524.2ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:37:53,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60941 states. [2021-06-05 16:37:54,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60941 to 40523. [2021-06-05 16:37:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40523 states, 40522 states have (on average 3.8970929371699325) internal successors, (157918), 40522 states have internal predecessors, (157918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:54,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40523 states to 40523 states and 157918 transitions. [2021-06-05 16:37:54,608 INFO L78 Accepts]: Start accepts. Automaton has 40523 states and 157918 transitions. Word has length 28 [2021-06-05 16:37:54,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:54,608 INFO L482 AbstractCegarLoop]: Abstraction has 40523 states and 157918 transitions. [2021-06-05 16:37:54,608 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) [2021-06-05 16:37:54,608 INFO L276 IsEmpty]: Start isEmpty. Operand 40523 states and 157918 transitions. [2021-06-05 16:37:54,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:54,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:54,670 INFO L521 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] [2021-06-05 16:37:54,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4116,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:54,871 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:54,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:54,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1049634039, now seen corresponding path program 145 times [2021-06-05 16:37:54,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:54,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193606371] [2021-06-05 16:37:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:54,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:54,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193606371] [2021-06-05 16:37:54,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193606371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:54,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944918271] [2021-06-05 16:37:54,904 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 [2021-06-05 16:37:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:54,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:54,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:55,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944918271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:55,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:55,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:37:55,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872717538] [2021-06-05 16:37:55,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:37:55,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:55,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:37:55,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:37:55,003 INFO L87 Difference]: Start difference. First operand 40523 states and 157918 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) [2021-06-05 16:37:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:56,082 INFO L93 Difference]: Finished difference Result 59492 states and 223219 transitions. [2021-06-05 16:37:56,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:37:56,082 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 [2021-06-05 16:37:56,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:56,237 INFO L225 Difference]: With dead ends: 59492 [2021-06-05 16:37:56,237 INFO L226 Difference]: Without dead ends: 59468 [2021-06-05 16:37:56,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 357.1ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:37:56,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59468 states. [2021-06-05 16:37:57,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59468 to 40429. [2021-06-05 16:37:57,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40429 states, 40428 states have (on average 3.8969278717720393) internal successors, (157545), 40428 states have internal predecessors, (157545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:57,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40429 states to 40429 states and 157545 transitions. [2021-06-05 16:37:57,631 INFO L78 Accepts]: Start accepts. Automaton has 40429 states and 157545 transitions. Word has length 28 [2021-06-05 16:37:57,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:57,631 INFO L482 AbstractCegarLoop]: Abstraction has 40429 states and 157545 transitions. [2021-06-05 16:37:57,631 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) [2021-06-05 16:37:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand 40429 states and 157545 transitions. [2021-06-05 16:37:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:57,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:57,705 INFO L521 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] [2021-06-05 16:37:57,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4117,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:57,906 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:57,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:57,906 INFO L82 PathProgramCache]: Analyzing trace with hash 547492677, now seen corresponding path program 146 times [2021-06-05 16:37:57,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:57,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454183130] [2021-06-05 16:37:57,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:37:57,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:57,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454183130] [2021-06-05 16:37:57,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454183130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:57,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893756417] [2021-06-05 16:37:57,942 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 [2021-06-05 16:37:57,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:37:57,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:57,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:57,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:58,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893756417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:58,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:58,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:37:58,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281932004] [2021-06-05 16:37:58,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:37:58,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:58,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:37:58,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:37:58,075 INFO L87 Difference]: Start difference. First operand 40429 states and 157545 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) [2021-06-05 16:37:59,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:59,484 INFO L93 Difference]: Finished difference Result 60725 states and 226603 transitions. [2021-06-05 16:37:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 16:37:59,485 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 [2021-06-05 16:37:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:59,644 INFO L225 Difference]: With dead ends: 60725 [2021-06-05 16:37:59,645 INFO L226 Difference]: Without dead ends: 60725 [2021-06-05 16:37:59,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 615.2ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:37:59,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60725 states. [2021-06-05 16:38:00,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60725 to 40525. [2021-06-05 16:38:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40525 states, 40524 states have (on average 3.8954446747606357) internal successors, (157859), 40524 states have internal predecessors, (157859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:00,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40525 states to 40525 states and 157859 transitions. [2021-06-05 16:38:00,948 INFO L78 Accepts]: Start accepts. Automaton has 40525 states and 157859 transitions. Word has length 28 [2021-06-05 16:38:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:00,948 INFO L482 AbstractCegarLoop]: Abstraction has 40525 states and 157859 transitions. [2021-06-05 16:38:00,948 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) [2021-06-05 16:38:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 40525 states and 157859 transitions. [2021-06-05 16:38:01,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:01,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:01,010 INFO L521 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] [2021-06-05 16:38:01,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4118 [2021-06-05 16:38:01,210 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:01,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:01,210 INFO L82 PathProgramCache]: Analyzing trace with hash -2104435465, now seen corresponding path program 147 times [2021-06-05 16:38:01,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:01,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388356577] [2021-06-05 16:38:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:38:01,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:01,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388356577] [2021-06-05 16:38:01,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388356577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:01,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602266632] [2021-06-05 16:38:01,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:38:01,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:38:01,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:01,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:01,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:01,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602266632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:01,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:01,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:38:01,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915221498] [2021-06-05 16:38:01,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:38:01,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:01,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:38:01,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:38:01,365 INFO L87 Difference]: Start difference. First operand 40525 states and 157859 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) [2021-06-05 16:38:02,229 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 16:38:02,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:02,649 INFO L93 Difference]: Finished difference Result 60415 states and 225723 transitions. [2021-06-05 16:38:02,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:38:02,650 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 [2021-06-05 16:38:02,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:02,813 INFO L225 Difference]: With dead ends: 60415 [2021-06-05 16:38:02,813 INFO L226 Difference]: Without dead ends: 60407 [2021-06-05 16:38:02,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 777.6ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:38:02,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60407 states. [2021-06-05 16:38:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60407 to 40457. [2021-06-05 16:38:04,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40457 states, 40456 states have (on average 3.8967520268934153) internal successors, (157647), 40456 states have internal predecessors, (157647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:04,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40457 states to 40457 states and 157647 transitions. [2021-06-05 16:38:04,216 INFO L78 Accepts]: Start accepts. Automaton has 40457 states and 157647 transitions. Word has length 28 [2021-06-05 16:38:04,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:04,216 INFO L482 AbstractCegarLoop]: Abstraction has 40457 states and 157647 transitions. [2021-06-05 16:38:04,216 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) [2021-06-05 16:38:04,216 INFO L276 IsEmpty]: Start isEmpty. Operand 40457 states and 157647 transitions. [2021-06-05 16:38:04,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:04,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:04,277 INFO L521 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] [2021-06-05 16:38:04,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4119,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:04,477 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:04,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:04,477 INFO L82 PathProgramCache]: Analyzing trace with hash 923074653, now seen corresponding path program 148 times [2021-06-05 16:38:04,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:04,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191782031] [2021-06-05 16:38:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:38:04,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:04,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191782031] [2021-06-05 16:38:04,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191782031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:04,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480121177] [2021-06-05 16:38:04,521 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 [2021-06-05 16:38:04,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:38:04,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:04,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:04,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:04,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480121177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:04,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:04,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:38:04,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002384795] [2021-06-05 16:38:04,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:38:04,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:04,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:38:04,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:38:04,628 INFO L87 Difference]: Start difference. First operand 40457 states and 157647 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) [2021-06-05 16:38:05,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:05,748 INFO L93 Difference]: Finished difference Result 59146 states and 222212 transitions. [2021-06-05 16:38:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:38:05,748 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 [2021-06-05 16:38:05,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:05,899 INFO L225 Difference]: With dead ends: 59146 [2021-06-05 16:38:05,900 INFO L226 Difference]: Without dead ends: 59122 [2021-06-05 16:38:05,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:38:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59122 states. [2021-06-05 16:38:07,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59122 to 40433. [2021-06-05 16:38:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40433 states, 40432 states have (on average 3.896888603086664) internal successors, (157559), 40432 states have internal predecessors, (157559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40433 states to 40433 states and 157559 transitions. [2021-06-05 16:38:07,237 INFO L78 Accepts]: Start accepts. Automaton has 40433 states and 157559 transitions. Word has length 28 [2021-06-05 16:38:07,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:07,238 INFO L482 AbstractCegarLoop]: Abstraction has 40433 states and 157559 transitions. [2021-06-05 16:38:07,238 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) [2021-06-05 16:38:07,238 INFO L276 IsEmpty]: Start isEmpty. Operand 40433 states and 157559 transitions. [2021-06-05 16:38:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:07,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:07,301 INFO L521 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] [2021-06-05 16:38:07,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4120 [2021-06-05 16:38:07,502 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:07,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:07,502 INFO L82 PathProgramCache]: Analyzing trace with hash 100408761, now seen corresponding path program 149 times [2021-06-05 16:38:07,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:07,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898210778] [2021-06-05 16:38:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:07,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:07,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898210778] [2021-06-05 16:38:07,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898210778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:07,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527902779] [2021-06-05 16:38:07,552 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 [2021-06-05 16:38:07,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:38:07,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:07,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:07,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:07,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527902779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:07,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:07,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:38:07,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237180310] [2021-06-05 16:38:07,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:38:07,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:07,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:38:07,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:38:07,651 INFO L87 Difference]: Start difference. First operand 40433 states and 157559 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) [2021-06-05 16:38:09,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:09,447 INFO L93 Difference]: Finished difference Result 62335 states and 231295 transitions. [2021-06-05 16:38:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 16:38:09,447 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 [2021-06-05 16:38:09,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:09,608 INFO L225 Difference]: With dead ends: 62335 [2021-06-05 16:38:09,608 INFO L226 Difference]: Without dead ends: 62335 [2021-06-05 16:38:09,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 1139.4ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 16:38:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62335 states. [2021-06-05 16:38:10,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62335 to 44875. [2021-06-05 16:38:10,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44875 states, 44874 states have (on average 3.8457458662031465) internal successors, (172574), 44874 states have internal predecessors, (172574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44875 states to 44875 states and 172574 transitions. [2021-06-05 16:38:11,102 INFO L78 Accepts]: Start accepts. Automaton has 44875 states and 172574 transitions. Word has length 28 [2021-06-05 16:38:11,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:11,102 INFO L482 AbstractCegarLoop]: Abstraction has 44875 states and 172574 transitions. [2021-06-05 16:38:11,102 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) [2021-06-05 16:38:11,102 INFO L276 IsEmpty]: Start isEmpty. Operand 44875 states and 172574 transitions. [2021-06-05 16:38:11,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:11,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:11,171 INFO L521 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] [2021-06-05 16:38:11,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4121 [2021-06-05 16:38:11,371 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:11,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:11,372 INFO L82 PathProgramCache]: Analyzing trace with hash 181784849, now seen corresponding path program 150 times [2021-06-05 16:38:11,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:11,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762914716] [2021-06-05 16:38:11,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:11,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:11,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762914716] [2021-06-05 16:38:11,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762914716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:11,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085940210] [2021-06-05 16:38:11,687 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 [2021-06-05 16:38:11,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:38:11,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:11,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:11,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:11,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085940210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:11,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:11,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:38:11,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83975205] [2021-06-05 16:38:11,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:38:11,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:11,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:38:11,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:38:11,811 INFO L87 Difference]: Start difference. First operand 44875 states and 172574 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) [2021-06-05 16:38:13,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:13,066 INFO L93 Difference]: Finished difference Result 61566 states and 229189 transitions. [2021-06-05 16:38:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:38:13,066 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 [2021-06-05 16:38:13,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:13,224 INFO L225 Difference]: With dead ends: 61566 [2021-06-05 16:38:13,224 INFO L226 Difference]: Without dead ends: 61558 [2021-06-05 16:38:13,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 950.9ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:38:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61558 states. [2021-06-05 16:38:14,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61558 to 43735. [2021-06-05 16:38:14,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43735 states, 43734 states have (on average 3.8648191338546667) internal successors, (169024), 43734 states have internal predecessors, (169024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43735 states to 43735 states and 169024 transitions. [2021-06-05 16:38:14,858 INFO L78 Accepts]: Start accepts. Automaton has 43735 states and 169024 transitions. Word has length 28 [2021-06-05 16:38:14,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:14,858 INFO L482 AbstractCegarLoop]: Abstraction has 43735 states and 169024 transitions. [2021-06-05 16:38:14,858 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) [2021-06-05 16:38:14,858 INFO L276 IsEmpty]: Start isEmpty. Operand 43735 states and 169024 transitions. [2021-06-05 16:38:14,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:14,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:14,924 INFO L521 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] [2021-06-05 16:38:15,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4122 [2021-06-05 16:38:15,125 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:15,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:15,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1333307123, now seen corresponding path program 151 times [2021-06-05 16:38:15,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:15,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675218364] [2021-06-05 16:38:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:15,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:15,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675218364] [2021-06-05 16:38:15,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675218364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:15,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894211140] [2021-06-05 16:38:15,164 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 [2021-06-05 16:38:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:15,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:15,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:15,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894211140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:15,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:15,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:38:15,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376024759] [2021-06-05 16:38:15,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:38:15,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:15,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:38:15,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:38:15,255 INFO L87 Difference]: Start difference. First operand 43735 states and 169024 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) [2021-06-05 16:38:16,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:16,378 INFO L93 Difference]: Finished difference Result 59917 states and 224585 transitions. [2021-06-05 16:38:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:38:16,378 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 [2021-06-05 16:38:16,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:16,533 INFO L225 Difference]: With dead ends: 59917 [2021-06-05 16:38:16,533 INFO L226 Difference]: Without dead ends: 59893 [2021-06-05 16:38:16,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 588.7ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:38:16,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59893 states. [2021-06-05 16:38:17,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59893 to 43743. [2021-06-05 16:38:17,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43743 states, 43742 states have (on average 3.8626948927803944) internal successors, (168962), 43742 states have internal predecessors, (168962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43743 states to 43743 states and 168962 transitions. [2021-06-05 16:38:18,265 INFO L78 Accepts]: Start accepts. Automaton has 43743 states and 168962 transitions. Word has length 28 [2021-06-05 16:38:18,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:18,265 INFO L482 AbstractCegarLoop]: Abstraction has 43743 states and 168962 transitions. [2021-06-05 16:38:18,265 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) [2021-06-05 16:38:18,265 INFO L276 IsEmpty]: Start isEmpty. Operand 43743 states and 168962 transitions. [2021-06-05 16:38:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:18,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:18,341 INFO L521 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] [2021-06-05 16:38:18,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4123 [2021-06-05 16:38:18,545 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:18,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1959694861, now seen corresponding path program 152 times [2021-06-05 16:38:18,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:18,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042008419] [2021-06-05 16:38:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:18,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:18,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042008419] [2021-06-05 16:38:18,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042008419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:18,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136728702] [2021-06-05 16:38:18,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:38:18,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:38:18,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:18,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:18,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:18,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136728702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:18,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:18,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:38:18,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260638429] [2021-06-05 16:38:18,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:38:18,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:18,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:38:18,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:38:18,697 INFO L87 Difference]: Start difference. First operand 43743 states and 168962 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) [2021-06-05 16:38:19,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:19,774 INFO L93 Difference]: Finished difference Result 61196 states and 228200 transitions. [2021-06-05 16:38:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:38:19,774 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 [2021-06-05 16:38:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:19,930 INFO L225 Difference]: With dead ends: 61196 [2021-06-05 16:38:19,930 INFO L226 Difference]: Without dead ends: 61156 [2021-06-05 16:38:19,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 541.2ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:38:19,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61156 states. [2021-06-05 16:38:21,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61156 to 43881. [2021-06-05 16:38:21,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43881 states, 43880 states have (on average 3.862010027347311) internal successors, (169465), 43880 states have internal predecessors, (169465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43881 states to 43881 states and 169465 transitions. [2021-06-05 16:38:21,594 INFO L78 Accepts]: Start accepts. Automaton has 43881 states and 169465 transitions. Word has length 28 [2021-06-05 16:38:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:21,594 INFO L482 AbstractCegarLoop]: Abstraction has 43881 states and 169465 transitions. [2021-06-05 16:38:21,594 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) [2021-06-05 16:38:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand 43881 states and 169465 transitions. [2021-06-05 16:38:21,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:21,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:21,658 INFO L521 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] [2021-06-05 16:38:21,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4124,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:21,859 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:21,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:21,859 INFO L82 PathProgramCache]: Analyzing trace with hash 243917385, now seen corresponding path program 153 times [2021-06-05 16:38:21,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:21,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091367930] [2021-06-05 16:38:21,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:21,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:21,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091367930] [2021-06-05 16:38:21,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091367930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:21,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498471599] [2021-06-05 16:38:21,899 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 [2021-06-05 16:38:21,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:38:21,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:21,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:21,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:22,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498471599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:22,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:22,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:38:22,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831214465] [2021-06-05 16:38:22,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:38:22,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:22,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:38:22,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:38:22,028 INFO L87 Difference]: Start difference. First operand 43881 states and 169465 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) [2021-06-05 16:38:23,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:23,484 INFO L93 Difference]: Finished difference Result 60421 states and 225864 transitions. [2021-06-05 16:38:23,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 16:38:23,485 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 [2021-06-05 16:38:23,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:23,638 INFO L225 Difference]: With dead ends: 60421 [2021-06-05 16:38:23,638 INFO L226 Difference]: Without dead ends: 60421 [2021-06-05 16:38:23,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2487 ImplicationChecksByTransitivity, 858.6ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 16:38:23,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60421 states. [2021-06-05 16:38:25,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60421 to 44786. [2021-06-05 16:38:25,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44786 states, 44785 states have (on average 3.8525399129172713) internal successors, (172536), 44785 states have internal predecessors, (172536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:25,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44786 states to 44786 states and 172536 transitions. [2021-06-05 16:38:25,267 INFO L78 Accepts]: Start accepts. Automaton has 44786 states and 172536 transitions. Word has length 28 [2021-06-05 16:38:25,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:25,267 INFO L482 AbstractCegarLoop]: Abstraction has 44786 states and 172536 transitions. [2021-06-05 16:38:25,267 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) [2021-06-05 16:38:25,267 INFO L276 IsEmpty]: Start isEmpty. Operand 44786 states and 172536 transitions. [2021-06-05 16:38:25,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:25,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:25,335 INFO L521 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] [2021-06-05 16:38:25,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4125,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:25,536 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:25,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:25,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1886956539, now seen corresponding path program 154 times [2021-06-05 16:38:25,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:25,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900427647] [2021-06-05 16:38:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:25,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:25,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900427647] [2021-06-05 16:38:25,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900427647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:25,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230673809] [2021-06-05 16:38:25,576 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 [2021-06-05 16:38:25,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:38:25,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:25,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:25,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:25,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230673809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:25,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:25,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:38:25,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878148671] [2021-06-05 16:38:25,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:38:25,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:25,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:38:25,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:38:25,697 INFO L87 Difference]: Start difference. First operand 44786 states and 172536 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) [2021-06-05 16:38:26,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:26,959 INFO L93 Difference]: Finished difference Result 59926 states and 224477 transitions. [2021-06-05 16:38:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:38:26,959 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 [2021-06-05 16:38:26,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:27,121 INFO L225 Difference]: With dead ends: 59926 [2021-06-05 16:38:27,121 INFO L226 Difference]: Without dead ends: 59918 [2021-06-05 16:38:27,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 690.7ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:38:27,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59918 states. [2021-06-05 16:38:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59918 to 44710. [2021-06-05 16:38:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44710 states, 44709 states have (on average 3.8538101948153614) internal successors, (172300), 44709 states have internal predecessors, (172300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:28,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44710 states to 44710 states and 172300 transitions. [2021-06-05 16:38:28,734 INFO L78 Accepts]: Start accepts. Automaton has 44710 states and 172300 transitions. Word has length 28 [2021-06-05 16:38:28,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:28,734 INFO L482 AbstractCegarLoop]: Abstraction has 44710 states and 172300 transitions. [2021-06-05 16:38:28,734 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) [2021-06-05 16:38:28,734 INFO L276 IsEmpty]: Start isEmpty. Operand 44710 states and 172300 transitions. [2021-06-05 16:38:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:28,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:28,799 INFO L521 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] [2021-06-05 16:38:28,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4126,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:28,999 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:28,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:28,999 INFO L82 PathProgramCache]: Analyzing trace with hash 619499361, now seen corresponding path program 155 times [2021-06-05 16:38:29,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:29,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178345492] [2021-06-05 16:38:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:29,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:29,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178345492] [2021-06-05 16:38:29,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178345492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:29,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958824067] [2021-06-05 16:38:29,039 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 [2021-06-05 16:38:29,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:38:29,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:29,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:29,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:29,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958824067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:29,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:29,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:38:29,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133416691] [2021-06-05 16:38:29,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:38:29,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:29,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:38:29,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:38:29,151 INFO L87 Difference]: Start difference. First operand 44710 states and 172300 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) [2021-06-05 16:38:30,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:30,303 INFO L93 Difference]: Finished difference Result 59403 states and 223231 transitions. [2021-06-05 16:38:30,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:38:30,304 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 [2021-06-05 16:38:30,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:30,461 INFO L225 Difference]: With dead ends: 59403 [2021-06-05 16:38:30,461 INFO L226 Difference]: Without dead ends: 59379 [2021-06-05 16:38:30,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 585.2ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:38:30,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59379 states. [2021-06-05 16:38:31,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59379 to 44696. [2021-06-05 16:38:32,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44696 states, 44695 states have (on average 3.8537867770444123) internal successors, (172245), 44695 states have internal predecessors, (172245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44696 states to 44696 states and 172245 transitions. [2021-06-05 16:38:32,164 INFO L78 Accepts]: Start accepts. Automaton has 44696 states and 172245 transitions. Word has length 28 [2021-06-05 16:38:32,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:32,165 INFO L482 AbstractCegarLoop]: Abstraction has 44696 states and 172245 transitions. [2021-06-05 16:38:32,165 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) [2021-06-05 16:38:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 44696 states and 172245 transitions. [2021-06-05 16:38:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:32,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:32,231 INFO L521 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] [2021-06-05 16:38:32,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4127,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:32,432 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:32,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:32,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085277, now seen corresponding path program 156 times [2021-06-05 16:38:32,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:32,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646270989] [2021-06-05 16:38:32,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:32,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:32,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646270989] [2021-06-05 16:38:32,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646270989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:32,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579507284] [2021-06-05 16:38:32,472 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 [2021-06-05 16:38:32,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:38:32,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:32,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:32,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:32,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579507284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:32,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:32,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:38:32,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92557010] [2021-06-05 16:38:32,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:38:32,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:32,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:38:32,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:38:32,571 INFO L87 Difference]: Start difference. First operand 44696 states and 172245 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) [2021-06-05 16:38:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:33,656 INFO L93 Difference]: Finished difference Result 59185 states and 222538 transitions. [2021-06-05 16:38:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:38:33,656 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 [2021-06-05 16:38:33,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:33,820 INFO L225 Difference]: With dead ends: 59185 [2021-06-05 16:38:33,820 INFO L226 Difference]: Without dead ends: 59145 [2021-06-05 16:38:33,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 536.3ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:38:33,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59145 states. [2021-06-05 16:38:35,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59145 to 45045. [2021-06-05 16:38:35,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45045 states, 45044 states have (on average 3.855652251132226) internal successors, (173674), 45044 states have internal predecessors, (173674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:35,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45045 states to 45045 states and 173674 transitions. [2021-06-05 16:38:35,536 INFO L78 Accepts]: Start accepts. Automaton has 45045 states and 173674 transitions. Word has length 28 [2021-06-05 16:38:35,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:35,536 INFO L482 AbstractCegarLoop]: Abstraction has 45045 states and 173674 transitions. [2021-06-05 16:38:35,536 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) [2021-06-05 16:38:35,536 INFO L276 IsEmpty]: Start isEmpty. Operand 45045 states and 173674 transitions. [2021-06-05 16:38:35,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:35,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:35,608 INFO L521 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] [2021-06-05 16:38:35,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4128,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:35,808 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:35,808 INFO L82 PathProgramCache]: Analyzing trace with hash 806750187, now seen corresponding path program 157 times [2021-06-05 16:38:35,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:35,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383286303] [2021-06-05 16:38:35,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:35,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:35,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383286303] [2021-06-05 16:38:35,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383286303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:35,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576050450] [2021-06-05 16:38:35,847 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 [2021-06-05 16:38:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:35,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:35,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:35,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576050450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:35,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:35,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:38:35,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684015269] [2021-06-05 16:38:35,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:38:35,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:35,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:38:35,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:38:35,967 INFO L87 Difference]: Start difference. First operand 45045 states and 173674 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) [2021-06-05 16:38:37,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:37,229 INFO L93 Difference]: Finished difference Result 71823 states and 267438 transitions. [2021-06-05 16:38:37,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:38:37,229 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 [2021-06-05 16:38:37,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:37,431 INFO L225 Difference]: With dead ends: 71823 [2021-06-05 16:38:37,431 INFO L226 Difference]: Without dead ends: 71823 [2021-06-05 16:38:37,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 614.4ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:38:37,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71823 states. [2021-06-05 16:38:38,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71823 to 46211. [2021-06-05 16:38:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46211 states, 46210 states have (on average 3.86991993075092) internal successors, (178829), 46210 states have internal predecessors, (178829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:39,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46211 states to 46211 states and 178829 transitions. [2021-06-05 16:38:39,144 INFO L78 Accepts]: Start accepts. Automaton has 46211 states and 178829 transitions. Word has length 28 [2021-06-05 16:38:39,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:39,144 INFO L482 AbstractCegarLoop]: Abstraction has 46211 states and 178829 transitions. [2021-06-05 16:38:39,144 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) [2021-06-05 16:38:39,144 INFO L276 IsEmpty]: Start isEmpty. Operand 46211 states and 178829 transitions. [2021-06-05 16:38:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:39,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:39,216 INFO L521 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] [2021-06-05 16:38:39,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4129 [2021-06-05 16:38:39,421 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:39,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:39,421 INFO L82 PathProgramCache]: Analyzing trace with hash 132028309, now seen corresponding path program 158 times [2021-06-05 16:38:39,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:39,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501403151] [2021-06-05 16:38:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:39,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:39,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501403151] [2021-06-05 16:38:39,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501403151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:39,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534775244] [2021-06-05 16:38:39,461 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 [2021-06-05 16:38:39,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:38:39,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:39,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:39,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:39,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:39,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534775244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:39,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:39,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:38:39,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348583434] [2021-06-05 16:38:39,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:38:39,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:39,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:38:39,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:38:39,578 INFO L87 Difference]: Start difference. First operand 46211 states and 178829 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) [2021-06-05 16:38:40,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:40,691 INFO L93 Difference]: Finished difference Result 65877 states and 248593 transitions. [2021-06-05 16:38:40,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:38:40,692 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 [2021-06-05 16:38:40,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:40,864 INFO L225 Difference]: With dead ends: 65877 [2021-06-05 16:38:40,865 INFO L226 Difference]: Without dead ends: 65877 [2021-06-05 16:38:40,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 557.1ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:38:41,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65877 states. [2021-06-05 16:38:42,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65877 to 46241. [2021-06-05 16:38:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46241 states, 46240 states have (on average 3.8697231833910033) internal successors, (178936), 46240 states have internal predecessors, (178936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:42,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46241 states to 46241 states and 178936 transitions. [2021-06-05 16:38:42,628 INFO L78 Accepts]: Start accepts. Automaton has 46241 states and 178936 transitions. Word has length 28 [2021-06-05 16:38:42,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:42,628 INFO L482 AbstractCegarLoop]: Abstraction has 46241 states and 178936 transitions. [2021-06-05 16:38:42,628 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) [2021-06-05 16:38:42,629 INFO L276 IsEmpty]: Start isEmpty. Operand 46241 states and 178936 transitions. [2021-06-05 16:38:42,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:42,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:42,697 INFO L521 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] [2021-06-05 16:38:42,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4130,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:42,898 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:42,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:42,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1785388485, now seen corresponding path program 159 times [2021-06-05 16:38:42,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:42,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23517485] [2021-06-05 16:38:42,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:42,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:42,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23517485] [2021-06-05 16:38:42,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23517485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:42,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073434472] [2021-06-05 16:38:42,950 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 [2021-06-05 16:38:42,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:38:42,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:42,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:42,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:43,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073434472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:43,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:43,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:38:43,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040872110] [2021-06-05 16:38:43,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:38:43,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:43,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:38:43,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:38:43,078 INFO L87 Difference]: Start difference. First operand 46241 states and 178936 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) [2021-06-05 16:38:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:45,063 INFO L93 Difference]: Finished difference Result 66732 states and 251021 transitions. [2021-06-05 16:38:45,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 16:38:45,064 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 [2021-06-05 16:38:45,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:45,262 INFO L225 Difference]: With dead ends: 66732 [2021-06-05 16:38:45,262 INFO L226 Difference]: Without dead ends: 66732 [2021-06-05 16:38:45,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2901 ImplicationChecksByTransitivity, 931.8ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 16:38:45,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66732 states. [2021-06-05 16:38:46,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66732 to 46505. [2021-06-05 16:38:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46505 states, 46504 states have (on average 3.8662050576294513) internal successors, (179794), 46504 states have internal predecessors, (179794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46505 states to 46505 states and 179794 transitions. [2021-06-05 16:38:46,731 INFO L78 Accepts]: Start accepts. Automaton has 46505 states and 179794 transitions. Word has length 28 [2021-06-05 16:38:46,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:46,732 INFO L482 AbstractCegarLoop]: Abstraction has 46505 states and 179794 transitions. [2021-06-05 16:38:46,732 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) [2021-06-05 16:38:46,732 INFO L276 IsEmpty]: Start isEmpty. Operand 46505 states and 179794 transitions. [2021-06-05 16:38:46,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:46,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:46,803 INFO L521 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] [2021-06-05 16:38:47,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4131 [2021-06-05 16:38:47,003 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:47,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:47,003 INFO L82 PathProgramCache]: Analyzing trace with hash -866539657, now seen corresponding path program 160 times [2021-06-05 16:38:47,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:47,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363643595] [2021-06-05 16:38:47,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:47,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:47,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363643595] [2021-06-05 16:38:47,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363643595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:47,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422569405] [2021-06-05 16:38:47,042 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 [2021-06-05 16:38:47,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:38:47,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:47,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:47,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:47,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422569405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:47,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:47,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:38:47,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22491703] [2021-06-05 16:38:47,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:38:47,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:47,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:38:47,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:38:47,162 INFO L87 Difference]: Start difference. First operand 46505 states and 179794 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) [2021-06-05 16:38:48,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:48,872 INFO L93 Difference]: Finished difference Result 65947 states and 248794 transitions. [2021-06-05 16:38:48,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:38:48,873 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 [2021-06-05 16:38:48,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:49,048 INFO L225 Difference]: With dead ends: 65947 [2021-06-05 16:38:49,048 INFO L226 Difference]: Without dead ends: 65943 [2021-06-05 16:38:49,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 732.1ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 16:38:49,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65943 states. [2021-06-05 16:38:50,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65943 to 46141. [2021-06-05 16:38:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46141 states, 46140 states have (on average 3.8699176419592543) internal successors, (178558), 46140 states have internal predecessors, (178558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46141 states to 46141 states and 178558 transitions. [2021-06-05 16:38:50,573 INFO L78 Accepts]: Start accepts. Automaton has 46141 states and 178558 transitions. Word has length 28 [2021-06-05 16:38:50,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:50,573 INFO L482 AbstractCegarLoop]: Abstraction has 46141 states and 178558 transitions. [2021-06-05 16:38:50,573 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) [2021-06-05 16:38:50,573 INFO L276 IsEmpty]: Start isEmpty. Operand 46141 states and 178558 transitions. [2021-06-05 16:38:50,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:50,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:50,643 INFO L521 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] [2021-06-05 16:38:50,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4132,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:50,843 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:50,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:50,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1338899459, now seen corresponding path program 161 times [2021-06-05 16:38:50,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:50,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291586950] [2021-06-05 16:38:50,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:50,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:50,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291586950] [2021-06-05 16:38:50,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291586950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:50,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353956232] [2021-06-05 16:38:50,883 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 [2021-06-05 16:38:50,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:38:50,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:50,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:50,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:50,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353956232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:50,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:50,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:38:50,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652659154] [2021-06-05 16:38:50,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:38:50,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:50,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:38:50,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:38:50,999 INFO L87 Difference]: Start difference. First operand 46141 states and 178558 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) [2021-06-05 16:38:52,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:52,287 INFO L93 Difference]: Finished difference Result 60232 states and 229011 transitions. [2021-06-05 16:38:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:38:52,287 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 [2021-06-05 16:38:52,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:52,444 INFO L225 Difference]: With dead ends: 60232 [2021-06-05 16:38:52,444 INFO L226 Difference]: Without dead ends: 60232 [2021-06-05 16:38:52,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 482.8ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:38:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60232 states. [2021-06-05 16:38:53,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60232 to 46157. [2021-06-05 16:38:53,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46157 states, 46156 states have (on average 3.8717826501429933) internal successors, (178706), 46156 states have internal predecessors, (178706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:53,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46157 states to 46157 states and 178706 transitions. [2021-06-05 16:38:53,786 INFO L78 Accepts]: Start accepts. Automaton has 46157 states and 178706 transitions. Word has length 28 [2021-06-05 16:38:53,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:53,786 INFO L482 AbstractCegarLoop]: Abstraction has 46157 states and 178706 transitions. [2021-06-05 16:38:53,786 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) [2021-06-05 16:38:53,786 INFO L276 IsEmpty]: Start isEmpty. Operand 46157 states and 178706 transitions. [2021-06-05 16:38:53,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:53,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:53,857 INFO L521 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] [2021-06-05 16:38:54,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4133 [2021-06-05 16:38:54,058 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:54,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:54,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1775748157, now seen corresponding path program 162 times [2021-06-05 16:38:54,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:54,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919934525] [2021-06-05 16:38:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:54,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:54,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919934525] [2021-06-05 16:38:54,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919934525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:54,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419362538] [2021-06-05 16:38:54,113 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 [2021-06-05 16:38:54,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:38:54,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:54,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:54,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:54,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419362538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:54,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:54,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:38:54,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669128867] [2021-06-05 16:38:54,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:38:54,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:54,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:38:54,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:38:54,222 INFO L87 Difference]: Start difference. First operand 46157 states and 178706 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) [2021-06-05 16:38:55,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:55,003 INFO L93 Difference]: Finished difference Result 59549 states and 227144 transitions. [2021-06-05 16:38:55,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:38:55,004 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 [2021-06-05 16:38:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:55,170 INFO L225 Difference]: With dead ends: 59549 [2021-06-05 16:38:55,170 INFO L226 Difference]: Without dead ends: 59537 [2021-06-05 16:38:55,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 374.9ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:38:55,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59537 states. [2021-06-05 16:38:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59537 to 46091. [2021-06-05 16:38:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46091 states, 46090 states have (on average 3.8729225428509437) internal successors, (178503), 46090 states have internal predecessors, (178503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:56,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46091 states to 46091 states and 178503 transitions. [2021-06-05 16:38:56,987 INFO L78 Accepts]: Start accepts. Automaton has 46091 states and 178503 transitions. Word has length 28 [2021-06-05 16:38:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:56,987 INFO L482 AbstractCegarLoop]: Abstraction has 46091 states and 178503 transitions. [2021-06-05 16:38:56,987 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) [2021-06-05 16:38:56,987 INFO L276 IsEmpty]: Start isEmpty. Operand 46091 states and 178503 transitions. [2021-06-05 16:38:57,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:57,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:57,083 INFO L521 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] [2021-06-05 16:38:57,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4134 [2021-06-05 16:38:57,305 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:57,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:57,306 INFO L82 PathProgramCache]: Analyzing trace with hash 517999999, now seen corresponding path program 163 times [2021-06-05 16:38:57,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:57,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878638105] [2021-06-05 16:38:57,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:57,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:57,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878638105] [2021-06-05 16:38:57,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878638105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:57,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086845568] [2021-06-05 16:38:57,359 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 [2021-06-05 16:38:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:57,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:57,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:57,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086845568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:57,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:57,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:38:57,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432392211] [2021-06-05 16:38:57,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:38:57,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:57,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:38:57,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:38:57,513 INFO L87 Difference]: Start difference. First operand 46091 states and 178503 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) [2021-06-05 16:38:58,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:58,201 INFO L93 Difference]: Finished difference Result 50569 states and 193277 transitions. [2021-06-05 16:38:58,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:38:58,201 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 [2021-06-05 16:38:58,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:58,335 INFO L225 Difference]: With dead ends: 50569 [2021-06-05 16:38:58,335 INFO L226 Difference]: Without dead ends: 50569 [2021-06-05 16:38:58,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:38:58,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50569 states. [2021-06-05 16:38:59,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50569 to 46299. [2021-06-05 16:38:59,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46299 states, 46298 states have (on average 3.8704695667199447) internal successors, (179195), 46298 states have internal predecessors, (179195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46299 states to 46299 states and 179195 transitions. [2021-06-05 16:38:59,658 INFO L78 Accepts]: Start accepts. Automaton has 46299 states and 179195 transitions. Word has length 28 [2021-06-05 16:38:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:59,658 INFO L482 AbstractCegarLoop]: Abstraction has 46299 states and 179195 transitions. [2021-06-05 16:38:59,658 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) [2021-06-05 16:38:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 46299 states and 179195 transitions. [2021-06-05 16:38:59,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:59,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:59,729 INFO L521 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] [2021-06-05 16:38:59,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4135,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:59,929 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:59,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:59,929 INFO L82 PathProgramCache]: Analyzing trace with hash -480567967, now seen corresponding path program 164 times [2021-06-05 16:38:59,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:59,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650782168] [2021-06-05 16:38:59,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:59,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:59,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650782168] [2021-06-05 16:38:59,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650782168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:59,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212218392] [2021-06-05 16:38:59,965 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 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 [2021-06-05 16:38:59,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:38:59,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:59,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:59,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:00,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212218392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:00,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:00,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:39:00,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298924438] [2021-06-05 16:39:00,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:39:00,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:00,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:39:00,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:39:00,096 INFO L87 Difference]: Start difference. First operand 46299 states and 179195 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) [2021-06-05 16:39:01,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:01,149 INFO L93 Difference]: Finished difference Result 50416 states and 192879 transitions. [2021-06-05 16:39:01,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:39:01,150 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 [2021-06-05 16:39:01,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:01,282 INFO L225 Difference]: With dead ends: 50416 [2021-06-05 16:39:01,282 INFO L226 Difference]: Without dead ends: 50412 [2021-06-05 16:39:01,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 681.3ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:39:01,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50412 states. [2021-06-05 16:39:02,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50412 to 46239. [2021-06-05 16:39:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46239 states, 46238 states have (on average 3.8713395908127515) internal successors, (179003), 46238 states have internal predecessors, (179003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46239 states to 46239 states and 179003 transitions. [2021-06-05 16:39:02,480 INFO L78 Accepts]: Start accepts. Automaton has 46239 states and 179003 transitions. Word has length 28 [2021-06-05 16:39:02,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:02,480 INFO L482 AbstractCegarLoop]: Abstraction has 46239 states and 179003 transitions. [2021-06-05 16:39:02,480 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) [2021-06-05 16:39:02,480 INFO L276 IsEmpty]: Start isEmpty. Operand 46239 states and 179003 transitions. [2021-06-05 16:39:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:02,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:02,550 INFO L521 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] [2021-06-05 16:39:02,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4136,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:02,750 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:02,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:02,751 INFO L82 PathProgramCache]: Analyzing trace with hash -510371023, now seen corresponding path program 78 times [2021-06-05 16:39:02,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:02,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216715646] [2021-06-05 16:39:02,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:02,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:02,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216715646] [2021-06-05 16:39:02,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216715646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:02,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008262338] [2021-06-05 16:39:02,790 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 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 [2021-06-05 16:39:02,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:39:02,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:02,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:02,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:02,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008262338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:02,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:02,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 16:39:02,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434033998] [2021-06-05 16:39:02,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:39:02,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:02,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:39:02,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:39:02,868 INFO L87 Difference]: Start difference. First operand 46239 states and 179003 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) [2021-06-05 16:39:03,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:03,435 INFO L93 Difference]: Finished difference Result 50471 states and 192992 transitions. [2021-06-05 16:39:03,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:39:03,435 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 [2021-06-05 16:39:03,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:03,572 INFO L225 Difference]: With dead ends: 50471 [2021-06-05 16:39:03,572 INFO L226 Difference]: Without dead ends: 50471 [2021-06-05 16:39:03,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 216.7ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:39:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50471 states. [2021-06-05 16:39:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50471 to 46343. [2021-06-05 16:39:04,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46343 states, 46342 states have (on average 3.869643088343188) internal successors, (179327), 46342 states have internal predecessors, (179327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46343 states to 46343 states and 179327 transitions. [2021-06-05 16:39:04,923 INFO L78 Accepts]: Start accepts. Automaton has 46343 states and 179327 transitions. Word has length 28 [2021-06-05 16:39:04,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:04,923 INFO L482 AbstractCegarLoop]: Abstraction has 46343 states and 179327 transitions. [2021-06-05 16:39:04,923 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) [2021-06-05 16:39:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 46343 states and 179327 transitions. [2021-06-05 16:39:05,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:05,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:05,377 INFO L521 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] [2021-06-05 16:39:05,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4137,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:05,581 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:05,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:05,581 INFO L82 PathProgramCache]: Analyzing trace with hash 394977929, now seen corresponding path program 79 times [2021-06-05 16:39:05,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:05,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734288881] [2021-06-05 16:39:05,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:05,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:05,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734288881] [2021-06-05 16:39:05,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734288881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:05,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644809770] [2021-06-05 16:39:05,617 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 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 [2021-06-05 16:39:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:05,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:05,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:05,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644809770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:05,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:05,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 16:39:05,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094087598] [2021-06-05 16:39:05,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:39:05,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:05,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:39:05,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:39:05,689 INFO L87 Difference]: Start difference. First operand 46343 states and 179327 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) [2021-06-05 16:39:06,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:06,160 INFO L93 Difference]: Finished difference Result 50566 states and 193429 transitions. [2021-06-05 16:39:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:39:06,160 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 [2021-06-05 16:39:06,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:06,294 INFO L225 Difference]: With dead ends: 50566 [2021-06-05 16:39:06,294 INFO L226 Difference]: Without dead ends: 50554 [2021-06-05 16:39:06,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:39:06,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50554 states. [2021-06-05 16:39:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50554 to 46475. [2021-06-05 16:39:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46475 states, 46474 states have (on average 3.867861600034428) internal successors, (179755), 46474 states have internal predecessors, (179755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46475 states to 46475 states and 179755 transitions. [2021-06-05 16:39:07,531 INFO L78 Accepts]: Start accepts. Automaton has 46475 states and 179755 transitions. Word has length 28 [2021-06-05 16:39:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:07,531 INFO L482 AbstractCegarLoop]: Abstraction has 46475 states and 179755 transitions. [2021-06-05 16:39:07,532 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) [2021-06-05 16:39:07,532 INFO L276 IsEmpty]: Start isEmpty. Operand 46475 states and 179755 transitions. [2021-06-05 16:39:07,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:07,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:07,604 INFO L521 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] [2021-06-05 16:39:07,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4138,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:07,804 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:07,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:07,805 INFO L82 PathProgramCache]: Analyzing trace with hash -597515635, now seen corresponding path program 80 times [2021-06-05 16:39:07,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:07,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516489010] [2021-06-05 16:39:07,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:07,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:07,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516489010] [2021-06-05 16:39:07,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516489010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:07,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953486631] [2021-06-05 16:39:07,844 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 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 [2021-06-05 16:39:07,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:39:07,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:07,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:07,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:07,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953486631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:07,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:07,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 16:39:07,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861339197] [2021-06-05 16:39:07,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:39:07,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:07,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:39:07,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:39:07,927 INFO L87 Difference]: Start difference. First operand 46475 states and 179755 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) [2021-06-05 16:39:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:08,412 INFO L93 Difference]: Finished difference Result 50530 states and 193345 transitions. [2021-06-05 16:39:08,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:39:08,412 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 [2021-06-05 16:39:08,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:08,545 INFO L225 Difference]: With dead ends: 50530 [2021-06-05 16:39:08,545 INFO L226 Difference]: Without dead ends: 50510 [2021-06-05 16:39:08,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:39:08,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50510 states. [2021-06-05 16:39:09,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50510 to 46475. [2021-06-05 16:39:09,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46475 states, 46474 states have (on average 3.867775530404097) internal successors, (179751), 46474 states have internal predecessors, (179751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46475 states to 46475 states and 179751 transitions. [2021-06-05 16:39:10,141 INFO L78 Accepts]: Start accepts. Automaton has 46475 states and 179751 transitions. Word has length 28 [2021-06-05 16:39:10,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:10,141 INFO L482 AbstractCegarLoop]: Abstraction has 46475 states and 179751 transitions. [2021-06-05 16:39:10,142 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) [2021-06-05 16:39:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 46475 states and 179751 transitions. [2021-06-05 16:39:10,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:10,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:10,218 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:10,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4139 [2021-06-05 16:39:10,418 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:10,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:10,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1058352779, now seen corresponding path program 165 times [2021-06-05 16:39:10,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:10,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352885450] [2021-06-05 16:39:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:10,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:10,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352885450] [2021-06-05 16:39:10,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352885450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:10,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424662395] [2021-06-05 16:39:10,454 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 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 [2021-06-05 16:39:10,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:39:10,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:10,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:39:10,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:10,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424662395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:10,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:10,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:39:10,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859567622] [2021-06-05 16:39:10,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:39:10,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:10,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:39:10,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:39:10,538 INFO L87 Difference]: Start difference. First operand 46475 states and 179751 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) [2021-06-05 16:39:10,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:10,978 INFO L93 Difference]: Finished difference Result 51418 states and 197281 transitions. [2021-06-05 16:39:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:39:10,978 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 [2021-06-05 16:39:10,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:11,114 INFO L225 Difference]: With dead ends: 51418 [2021-06-05 16:39:11,114 INFO L226 Difference]: Without dead ends: 51415 [2021-06-05 16:39:11,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:39:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51415 states. [2021-06-05 16:39:12,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51415 to 48550. [2021-06-05 16:39:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48550 states, 48549 states have (on average 3.876434118107479) internal successors, (188197), 48549 states have internal predecessors, (188197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48550 states to 48550 states and 188197 transitions. [2021-06-05 16:39:12,371 INFO L78 Accepts]: Start accepts. Automaton has 48550 states and 188197 transitions. Word has length 28 [2021-06-05 16:39:12,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:12,371 INFO L482 AbstractCegarLoop]: Abstraction has 48550 states and 188197 transitions. [2021-06-05 16:39:12,371 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) [2021-06-05 16:39:12,371 INFO L276 IsEmpty]: Start isEmpty. Operand 48550 states and 188197 transitions. [2021-06-05 16:39:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:12,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:12,443 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:12,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4140,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:12,643 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:12,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:12,644 INFO L82 PathProgramCache]: Analyzing trace with hash 287300907, now seen corresponding path program 166 times [2021-06-05 16:39:12,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:12,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51159033] [2021-06-05 16:39:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:12,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:12,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51159033] [2021-06-05 16:39:12,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51159033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:12,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685099994] [2021-06-05 16:39:12,680 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 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 [2021-06-05 16:39:12,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:39:12,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:12,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:39:12,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:12,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685099994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:12,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:12,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:39:12,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886382389] [2021-06-05 16:39:12,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:39:12,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:12,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:39:12,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:39:12,768 INFO L87 Difference]: Start difference. First operand 48550 states and 188197 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) [2021-06-05 16:39:13,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:13,586 INFO L93 Difference]: Finished difference Result 54116 states and 206168 transitions. [2021-06-05 16:39:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:39:13,586 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 [2021-06-05 16:39:13,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:13,737 INFO L225 Difference]: With dead ends: 54116 [2021-06-05 16:39:13,737 INFO L226 Difference]: Without dead ends: 54116 [2021-06-05 16:39:13,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:39:13,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54116 states. [2021-06-05 16:39:14,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54116 to 43065. [2021-06-05 16:39:14,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43065 states, 43064 states have (on average 3.8637609139884823) internal successors, (166389), 43064 states have internal predecessors, (166389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43065 states to 43065 states and 166389 transitions. [2021-06-05 16:39:14,981 INFO L78 Accepts]: Start accepts. Automaton has 43065 states and 166389 transitions. Word has length 28 [2021-06-05 16:39:14,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:14,981 INFO L482 AbstractCegarLoop]: Abstraction has 43065 states and 166389 transitions. [2021-06-05 16:39:14,981 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) [2021-06-05 16:39:14,982 INFO L276 IsEmpty]: Start isEmpty. Operand 43065 states and 166389 transitions. [2021-06-05 16:39:15,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:15,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:15,049 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:15,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4141 [2021-06-05 16:39:15,249 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:15,249 INFO L82 PathProgramCache]: Analyzing trace with hash 811277253, now seen corresponding path program 167 times [2021-06-05 16:39:15,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:15,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223172176] [2021-06-05 16:39:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:15,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:15,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223172176] [2021-06-05 16:39:15,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223172176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:15,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094947317] [2021-06-05 16:39:15,285 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 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 [2021-06-05 16:39:15,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:39:15,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:15,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:39:15,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:15,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094947317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:15,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:15,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:39:15,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109050088] [2021-06-05 16:39:15,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:39:15,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:15,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:39:15,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:39:15,374 INFO L87 Difference]: Start difference. First operand 43065 states and 166389 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) [2021-06-05 16:39:15,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:15,922 INFO L93 Difference]: Finished difference Result 47945 states and 182818 transitions. [2021-06-05 16:39:15,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:39:15,922 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 [2021-06-05 16:39:15,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:16,036 INFO L225 Difference]: With dead ends: 47945 [2021-06-05 16:39:16,036 INFO L226 Difference]: Without dead ends: 47945 [2021-06-05 16:39:16,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:39:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47945 states. [2021-06-05 16:39:17,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47945 to 43898. [2021-06-05 16:39:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43898 states, 43897 states have (on average 3.8623823951522884) internal successors, (169547), 43897 states have internal predecessors, (169547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:17,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43898 states to 43898 states and 169547 transitions. [2021-06-05 16:39:17,221 INFO L78 Accepts]: Start accepts. Automaton has 43898 states and 169547 transitions. Word has length 28 [2021-06-05 16:39:17,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:17,221 INFO L482 AbstractCegarLoop]: Abstraction has 43898 states and 169547 transitions. [2021-06-05 16:39:17,221 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) [2021-06-05 16:39:17,221 INFO L276 IsEmpty]: Start isEmpty. Operand 43898 states and 169547 transitions. [2021-06-05 16:39:17,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:17,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:17,295 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:17,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4142,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:17,496 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:17,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:17,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1041987733, now seen corresponding path program 168 times [2021-06-05 16:39:17,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:17,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838014087] [2021-06-05 16:39:17,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:17,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:17,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838014087] [2021-06-05 16:39:17,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838014087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:17,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630746365] [2021-06-05 16:39:17,538 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 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 [2021-06-05 16:39:17,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:39:17,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:17,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:39:17,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:17,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630746365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:17,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:17,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:39:17,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592994131] [2021-06-05 16:39:17,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:39:17,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:17,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:39:17,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:39:17,623 INFO L87 Difference]: Start difference. First operand 43898 states and 169547 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) [2021-06-05 16:39:18,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:18,042 INFO L93 Difference]: Finished difference Result 45655 states and 175408 transitions. [2021-06-05 16:39:18,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:39:18,043 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 [2021-06-05 16:39:18,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:18,500 INFO L225 Difference]: With dead ends: 45655 [2021-06-05 16:39:18,500 INFO L226 Difference]: Without dead ends: 45655 [2021-06-05 16:39:18,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:39:18,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45655 states. [2021-06-05 16:39:19,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45655 to 43906. [2021-06-05 16:39:19,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43906 states, 43905 states have (on average 3.862225259082109) internal successors, (169571), 43905 states have internal predecessors, (169571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43906 states to 43906 states and 169571 transitions. [2021-06-05 16:39:19,342 INFO L78 Accepts]: Start accepts. Automaton has 43906 states and 169571 transitions. Word has length 28 [2021-06-05 16:39:19,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:19,342 INFO L482 AbstractCegarLoop]: Abstraction has 43906 states and 169571 transitions. [2021-06-05 16:39:19,342 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) [2021-06-05 16:39:19,342 INFO L276 IsEmpty]: Start isEmpty. Operand 43906 states and 169571 transitions. [2021-06-05 16:39:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:19,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:19,410 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forcibly destroying the process [2021-06-05 16:39:19,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4143 [2021-06-05 16:39:19,698 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:19,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1139256197, now seen corresponding path program 169 times [2021-06-05 16:39:19,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:19,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839257901] [2021-06-05 16:39:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] The stream was forcibly closed: stdIn [2021-06-05 16:39:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:19,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:19,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839257901] [2021-06-05 16:39:19,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839257901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:19,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321055641] [2021-06-05 16:39:19,762 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 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 [2021-06-05 16:39:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:19,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:39:19,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:19,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321055641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:19,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:19,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:39:19,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805816570] [2021-06-05 16:39:19,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:39:19,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:19,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:39:19,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:39:19,855 INFO L87 Difference]: Start difference. First operand 43906 states and 169571 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) [2021-06-05 16:39:20,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:20,320 INFO L93 Difference]: Finished difference Result 45371 states and 174477 transitions. [2021-06-05 16:39:20,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:39:20,320 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 [2021-06-05 16:39:20,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:20,430 INFO L225 Difference]: With dead ends: 45371 [2021-06-05 16:39:20,430 INFO L226 Difference]: Without dead ends: 45371 [2021-06-05 16:39:20,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:39:20,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45371 states. [2021-06-05 16:39:21,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45371 to 43796. [2021-06-05 16:39:21,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43796 states, 43795 states have (on average 3.8620390455531455) internal successors, (169138), 43795 states have internal predecessors, (169138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:21,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43796 states to 43796 states and 169138 transitions. [2021-06-05 16:39:21,487 INFO L78 Accepts]: Start accepts. Automaton has 43796 states and 169138 transitions. Word has length 28 [2021-06-05 16:39:21,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:21,487 INFO L482 AbstractCegarLoop]: Abstraction has 43796 states and 169138 transitions. [2021-06-05 16:39:21,487 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) [2021-06-05 16:39:21,487 INFO L276 IsEmpty]: Start isEmpty. Operand 43796 states and 169138 transitions. [2021-06-05 16:39:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:39:21,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:21,555 INFO L521 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] [2021-06-05 16:39:21,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4144 [2021-06-05 16:39:21,755 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:21,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:21,756 INFO L82 PathProgramCache]: Analyzing trace with hash -993746325, now seen corresponding path program 170 times [2021-06-05 16:39:21,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:21,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773081451] [2021-06-05 16:39:21,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:22,344 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2021-06-05 16:39:22,613 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-06-05 16:39:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:22,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:22,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773081451] [2021-06-05 16:39:22,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773081451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:22,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136035993] [2021-06-05 16:39:22,860 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 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 [2021-06-05 16:39:22,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:39:22,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:22,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:39:22,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:23,224 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-05 16:39:23,592 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 16:39:23,919 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 16:39:24,133 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 16:39:24,319 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 16:39:24,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,583 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 37 treesize of output 19 [2021-06-05 16:39:24,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:24,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2021-06-05 16:39:24,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:24,919 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 110 [2021-06-05 16:39:24,920 INFO L628 ElimStorePlain]: treesize reduction 342, result has 42.2 percent of original size [2021-06-05 16:39:24,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,927 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 [2021-06-05 16:39:24,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:25,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:25,020 INFO L518 ElimStorePlain]: Eliminatee v_prenex_561 vanished before elimination [2021-06-05 16:39:25,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:25,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:25,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:25,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:39:25,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:25,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:25,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:25,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:25,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:39:25,120 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:25,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:25,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:25,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:25,202 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 30 treesize of output 16 [2021-06-05 16:39:25,203 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:25,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:25,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:25,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:25,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:25,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:25,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:25,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:39:25,284 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:25,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:25,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:25,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:25,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:39:25,355 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:25,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:25,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:39:25,415 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:668, output treesize:36 [2021-06-05 16:39:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:25,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136035993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:25,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:25,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 16:39:25,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379751807] [2021-06-05 16:39:25,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:39:25,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:25,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:39:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:39:25,458 INFO L87 Difference]: Start difference. First operand 43796 states and 169138 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) [2021-06-05 16:39:25,986 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2021-06-05 16:39:26,376 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-06-05 16:39:26,798 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-05 16:39:27,032 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 76 [2021-06-05 16:39:27,328 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 58 [2021-06-05 16:39:27,990 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 100 [2021-06-05 16:39:28,678 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2021-06-05 16:39:28,895 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-06-05 16:39:29,599 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 111 [2021-06-05 16:39:29,968 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 104 [2021-06-05 16:39:30,387 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 105 [2021-06-05 16:39:31,319 WARN L205 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 157 [2021-06-05 16:39:31,666 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 16:39:32,065 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-06-05 16:39:32,377 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-06-05 16:39:32,850 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-06-05 16:39:33,158 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-06-05 16:39:33,415 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 46 [2021-06-05 16:39:33,820 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-06-05 16:39:34,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:34,048 INFO L93 Difference]: Finished difference Result 53704 states and 203394 transitions. [2021-06-05 16:39:34,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:39:34,049 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 [2021-06-05 16:39:34,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:34,294 INFO L225 Difference]: With dead ends: 53704 [2021-06-05 16:39:34,294 INFO L226 Difference]: Without dead ends: 53629 [2021-06-05 16:39:34,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 9356.7ms TimeCoverageRelationStatistics Valid=421, Invalid=1835, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:39:34,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53629 states. [2021-06-05 16:39:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53629 to 43931. [2021-06-05 16:39:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43931 states, 43930 states have (on average 3.8612110175278853) internal successors, (169623), 43930 states have internal predecessors, (169623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43931 states to 43931 states and 169623 transitions. [2021-06-05 16:39:35,493 INFO L78 Accepts]: Start accepts. Automaton has 43931 states and 169623 transitions. Word has length 30 [2021-06-05 16:39:35,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:35,493 INFO L482 AbstractCegarLoop]: Abstraction has 43931 states and 169623 transitions. [2021-06-05 16:39:35,493 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) [2021-06-05 16:39:35,493 INFO L276 IsEmpty]: Start isEmpty. Operand 43931 states and 169623 transitions. [2021-06-05 16:39:35,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:39:35,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:35,570 INFO L521 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] [2021-06-05 16:39:35,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4145 [2021-06-05 16:39:35,771 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1272822955, now seen corresponding path program 171 times [2021-06-05 16:39:35,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:35,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760181899] [2021-06-05 16:39:35,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:36,186 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-06-05 16:39:36,315 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-06-05 16:39:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:36,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:36,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760181899] [2021-06-05 16:39:36,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760181899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:36,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115052587] [2021-06-05 16:39:36,555 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 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 [2021-06-05 16:39:36,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:39:36,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:36,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:39:36,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:36,930 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-05 16:39:37,147 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 16:39:37,909 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 105 [2021-06-05 16:39:38,497 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 16:39:38,782 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:39:38,782 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 26 treesize of output 44 [2021-06-05 16:39:38,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:40,192 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 354 DAG size of output: 338 [2021-06-05 16:39:40,193 INFO L628 ElimStorePlain]: treesize reduction 310, result has 77.1 percent of original size [2021-06-05 16:39:40,261 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:39:40,261 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 43 [2021-06-05 16:39:40,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:40,867 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2021-06-05 16:39:40,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:40,943 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 16:39:40,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2021-06-05 16:39:40,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:42,259 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 338 DAG size of output: 333 [2021-06-05 16:39:42,260 INFO L628 ElimStorePlain]: treesize reduction 9, result has 99.1 percent of original size [2021-06-05 16:39:42,342 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:39:42,342 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 [2021-06-05 16:39:42,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:42,439 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 16:39:42,439 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 [2021-06-05 16:39:42,447 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:43,559 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 344 DAG size of output: 330 [2021-06-05 16:39:43,560 INFO L628 ElimStorePlain]: treesize reduction 77, result has 92.5 percent of original size [2021-06-05 16:39:43,637 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:39:43,637 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 [2021-06-05 16:39:43,640 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:43,672 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:39:43,673 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 [2021-06-05 16:39:43,673 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:44,171 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2021-06-05 16:39:44,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:44,254 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:39:44,254 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 [2021-06-05 16:39:44,264 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:44,338 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 16:39:44,338 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 [2021-06-05 16:39:44,345 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:45,257 WARN L205 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 325 [2021-06-05 16:39:45,257 INFO L628 ElimStorePlain]: treesize reduction 68, result has 92.5 percent of original size [2021-06-05 16:39:45,327 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-06-05 16:39:45,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 39 [2021-06-05 16:39:45,328 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:45,395 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:39:45,395 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 47 [2021-06-05 16:39:45,399 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:46,317 WARN L205 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 324 [2021-06-05 16:39:46,318 INFO L628 ElimStorePlain]: treesize reduction 45, result has 94.6 percent of original size [2021-06-05 16:39:46,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:46,365 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 21 treesize of output 53 [2021-06-05 16:39:46,388 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:46,785 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2021-06-05 16:39:46,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:46,849 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:39:46,850 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 [2021-06-05 16:39:46,856 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:47,245 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2021-06-05 16:39:47,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:47,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:47,294 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 59 [2021-06-05 16:39:47,306 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:47,679 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2021-06-05 16:39:47,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:47,738 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:39:47,738 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 33 treesize of output 43 [2021-06-05 16:39:47,742 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:48,119 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2021-06-05 16:39:48,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:48,182 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:39:48,182 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 [2021-06-05 16:39:48,187 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:48,554 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2021-06-05 16:39:48,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:48,611 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:39:48,611 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 16:39:48,616 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:48,976 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2021-06-05 16:39:48,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:49,047 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 16:39:49,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:39:49,060 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:49,757 WARN L205 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 279 [2021-06-05 16:39:49,758 INFO L628 ElimStorePlain]: treesize reduction 26, result has 96.2 percent of original size [2021-06-05 16:39:49,815 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:39:49,815 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 43 [2021-06-05 16:39:49,819 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:50,166 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 276 [2021-06-05 16:39:50,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:50,223 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:39:50,223 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 43 [2021-06-05 16:39:50,225 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:50,569 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 276 [2021-06-05 16:39:50,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:50,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 32 dim-0 vars, 16 dim-1 vars, End of recursive call: and 19 xjuncts. [2021-06-05 16:39:50,697 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 48 variables, input treesize:1363, output treesize:907 [2021-06-05 16:39:50,995 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2021-06-05 16:39:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:51,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115052587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:51,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:51,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 16:39:51,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698334367] [2021-06-05 16:39:51,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:39:51,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:51,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:39:51,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:39:51,049 INFO L87 Difference]: Start difference. First operand 43931 states and 169623 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:51,487 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2021-06-05 16:39:51,784 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-05 16:39:52,263 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-06-05 16:39:52,560 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-06-05 16:39:52,758 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 61 [2021-06-05 16:39:52,954 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 50 [2021-06-05 16:39:53,221 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 16:39:53,441 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 62 [2021-06-05 16:39:53,754 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2021-06-05 16:39:54,575 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 123 [2021-06-05 16:39:55,105 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 82 [2021-06-05 16:39:55,297 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2021-06-05 16:39:55,552 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 16:39:56,361 WARN L205 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 109 [2021-06-05 16:39:57,338 WARN L205 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 148 [2021-06-05 16:39:57,479 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 44 [2021-06-05 16:39:58,323 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 134 [2021-06-05 16:39:58,803 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2021-06-05 16:39:59,255 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 16:39:59,595 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2021-06-05 16:39:59,814 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 16:40:00,301 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 107 [2021-06-05 16:40:01,963 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 186 DAG size of output: 173 [2021-06-05 16:40:02,574 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 40 [2021-06-05 16:40:02,853 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2021-06-05 16:40:03,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:03,040 INFO L93 Difference]: Finished difference Result 53564 states and 203065 transitions. [2021-06-05 16:40:03,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:40:03,041 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:40:03,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:03,184 INFO L225 Difference]: With dead ends: 53564 [2021-06-05 16:40:03,184 INFO L226 Difference]: Without dead ends: 53534 [2021-06-05 16:40:03,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 12714.4ms TimeCoverageRelationStatistics Valid=512, Invalid=3148, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:40:03,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53534 states. [2021-06-05 16:40:04,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53534 to 43946. [2021-06-05 16:40:04,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43946 states, 43945 states have (on average 3.8610080782796676) internal successors, (169672), 43945 states have internal predecessors, (169672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43946 states to 43946 states and 169672 transitions. [2021-06-05 16:40:04,275 INFO L78 Accepts]: Start accepts. Automaton has 43946 states and 169672 transitions. Word has length 30 [2021-06-05 16:40:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:04,275 INFO L482 AbstractCegarLoop]: Abstraction has 43946 states and 169672 transitions. [2021-06-05 16:40:04,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 43946 states and 169672 transitions. [2021-06-05 16:40:04,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:40:04,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:04,351 INFO L521 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] [2021-06-05 16:40:04,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4186 [2021-06-05 16:40:04,551 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:04,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:04,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1430715033, now seen corresponding path program 172 times [2021-06-05 16:40:04,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:04,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839601860] [2021-06-05 16:40:04,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:05,266 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-06-05 16:40:05,469 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 16:40:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:05,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:05,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839601860] [2021-06-05 16:40:05,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839601860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:05,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145505418] [2021-06-05 16:40:05,723 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 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 [2021-06-05 16:40:05,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:40:05,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:05,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:40:05,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:07,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,156 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 22 [2021-06-05 16:40:07,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,169 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 [2021-06-05 16:40:07,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,182 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 [2021-06-05 16:40:07,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,195 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 [2021-06-05 16:40:07,196 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,208 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 [2021-06-05 16:40:07,209 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,221 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 51 treesize of output 25 [2021-06-05 16:40:07,221 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,234 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 [2021-06-05 16:40:07,235 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,247 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 [2021-06-05 16:40:07,248 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,261 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 [2021-06-05 16:40:07,261 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 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 19 [2021-06-05 16:40:07,276 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,289 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 [2021-06-05 16:40:07,290 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,303 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 [2021-06-05 16:40:07,303 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 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 [2021-06-05 16:40:07,318 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,331 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 [2021-06-05 16:40:07,332 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,344 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 [2021-06-05 16:40:07,345 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,358 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 [2021-06-05 16:40:07,359 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 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 [2021-06-05 16:40:07,372 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,385 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 [2021-06-05 16:40:07,386 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,399 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 [2021-06-05 16:40:07,400 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,414 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 [2021-06-05 16:40:07,414 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,428 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 [2021-06-05 16:40:07,429 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,443 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 [2021-06-05 16:40:07,443 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,457 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 16 [2021-06-05 16:40:07,458 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,472 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 [2021-06-05 16:40:07,473 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,487 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 [2021-06-05 16:40:07,488 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,502 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 [2021-06-05 16:40:07,503 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,516 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 [2021-06-05 16:40:07,517 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,531 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 22 [2021-06-05 16:40:07,532 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,546 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 [2021-06-05 16:40:07,547 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,561 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 [2021-06-05 16:40:07,562 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,576 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 [2021-06-05 16:40:07,577 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,591 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 [2021-06-05 16:40:07,592 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,606 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 19 [2021-06-05 16:40:07,607 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,620 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 [2021-06-05 16:40:07,622 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,635 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 [2021-06-05 16:40:07,636 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,650 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 39 treesize of output 19 [2021-06-05 16:40:07,650 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,664 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 [2021-06-05 16:40:07,665 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,679 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 [2021-06-05 16:40:07,680 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,694 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 22 [2021-06-05 16:40:07,694 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,708 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 16 [2021-06-05 16:40:07,709 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,721 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 22 [2021-06-05 16:40:07,722 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,744 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 [2021-06-05 16:40:07,746 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,760 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 [2021-06-05 16:40:07,760 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,775 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 [2021-06-05 16:40:07,776 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,790 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 [2021-06-05 16:40:07,790 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,804 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 [2021-06-05 16:40:07,805 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 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 [2021-06-05 16:40:07,819 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,833 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 22 [2021-06-05 16:40:07,833 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,846 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 22 [2021-06-05 16:40:07,847 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,860 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 [2021-06-05 16:40:07,861 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,873 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 [2021-06-05 16:40:07,874 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,888 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 [2021-06-05 16:40:07,889 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,902 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 [2021-06-05 16:40:07,902 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,915 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 [2021-06-05 16:40:07,916 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,929 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 [2021-06-05 16:40:07,929 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,942 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 [2021-06-05 16:40:07,943 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,956 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 [2021-06-05 16:40:07,957 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,969 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 [2021-06-05 16:40:07,970 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,982 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 [2021-06-05 16:40:07,983 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:07,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:07,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 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 [2021-06-05 16:40:07,995 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:07,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:08,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:08,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:08,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:08,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:08,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:08,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:08,007 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 [2021-06-05 16:40:08,007 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:08,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:08,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:08,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:08,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:08,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:08,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:08,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:08,019 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 [2021-06-05 16:40:08,020 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:08,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:08,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:08,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:08,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:08,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:08,025 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 22 [2021-06-05 16:40:08,026 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:08,050 INFO L628 ElimStorePlain]: treesize reduction 52, result has 28.8 percent of original size [2021-06-05 16:40:08,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:40:08,051 INFO L247 ElimStorePlain]: Needed 64 recursive calls to eliminate 2 variables, input treesize:3328, output treesize:15 [2021-06-05 16:40:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:08,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145505418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:08,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:08,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 16:40:08,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832065476] [2021-06-05 16:40:08,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:40:08,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:08,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:40:08,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:40:08,085 INFO L87 Difference]: Start difference. First operand 43946 states and 169672 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) [2021-06-05 16:40:08,690 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 69 [2021-06-05 16:40:08,930 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 64 [2021-06-05 16:40:09,318 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 67 [2021-06-05 16:40:09,816 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 70 [2021-06-05 16:40:10,179 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 88 [2021-06-05 16:40:10,513 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 79 [2021-06-05 16:40:10,915 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 73 [2021-06-05 16:40:11,369 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 68 [2021-06-05 16:40:11,752 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 86 [2021-06-05 16:40:11,898 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2021-06-05 16:40:12,239 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 77 [2021-06-05 16:40:12,594 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 82 [2021-06-05 16:40:12,736 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-06-05 16:40:13,029 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 71 [2021-06-05 16:40:13,311 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 74 [2021-06-05 16:40:13,631 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 76 [2021-06-05 16:40:13,953 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2021-06-05 16:40:14,124 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 16:40:14,305 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2021-06-05 16:40:14,795 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 72 [2021-06-05 16:40:14,974 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-06-05 16:40:15,297 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 77 [2021-06-05 16:40:15,651 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2021-06-05 16:40:15,847 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-06-05 16:40:16,035 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2021-06-05 16:40:16,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:16,581 INFO L93 Difference]: Finished difference Result 55841 states and 209381 transitions. [2021-06-05 16:40:16,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:40:16,582 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 [2021-06-05 16:40:16,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:16,731 INFO L225 Difference]: With dead ends: 55841 [2021-06-05 16:40:16,731 INFO L226 Difference]: Without dead ends: 55811 [2021-06-05 16:40:16,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 8742.9ms TimeCoverageRelationStatistics Valid=553, Invalid=3229, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:40:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55811 states. [2021-06-05 16:40:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55811 to 43990. [2021-06-05 16:40:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43990 states, 43989 states have (on average 3.860851576530496) internal successors, (169835), 43989 states have internal predecessors, (169835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:17,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43990 states to 43990 states and 169835 transitions. [2021-06-05 16:40:17,806 INFO L78 Accepts]: Start accepts. Automaton has 43990 states and 169835 transitions. Word has length 30 [2021-06-05 16:40:17,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:17,806 INFO L482 AbstractCegarLoop]: Abstraction has 43990 states and 169835 transitions. [2021-06-05 16:40:17,806 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) [2021-06-05 16:40:17,806 INFO L276 IsEmpty]: Start isEmpty. Operand 43990 states and 169835 transitions. [2021-06-05 16:40:17,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:40:17,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:17,879 INFO L521 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] [2021-06-05 16:40:18,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4349,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:18,080 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:18,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:18,080 INFO L82 PathProgramCache]: Analyzing trace with hash 924713707, now seen corresponding path program 173 times [2021-06-05 16:40:18,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:18,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986640029] [2021-06-05 16:40:18,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:18,575 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-05 16:40:18,736 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2021-06-05 16:40:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:18,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:18,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986640029] [2021-06-05 16:40:18,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986640029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:18,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825783365] [2021-06-05 16:40:18,831 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 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 [2021-06-05 16:40:18,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:40:18,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:18,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:40:18,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:19,328 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-06-05 16:40:19,537 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 16:40:19,840 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 16:40:20,281 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 107 [2021-06-05 16:40:20,829 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-05 16:40:21,297 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 170 [2021-06-05 16:40:21,775 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-05 16:40:22,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,090 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 [2021-06-05 16:40:22,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:22,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,114 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 [2021-06-05 16:40:22,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:22,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,136 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 16 [2021-06-05 16:40:22,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:22,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,154 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 37 treesize of output 16 [2021-06-05 16:40:22,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:22,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,176 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 [2021-06-05 16:40:22,177 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:22,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,196 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 31 treesize of output 16 [2021-06-05 16:40:22,197 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:22,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,212 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 37 treesize of output 19 [2021-06-05 16:40:22,213 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:22,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,225 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 16 [2021-06-05 16:40:22,226 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:22,483 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 108 [2021-06-05 16:40:22,483 INFO L628 ElimStorePlain]: treesize reduction 256, result has 50.7 percent of original size [2021-06-05 16:40:22,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:40:22,496 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:22,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:40:22,508 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:22,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:22,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:40:22,520 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:22,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:22,527 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 [2021-06-05 16:40:22,528 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:22,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:40:22,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 34 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:40:22,608 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 36 variables, input treesize:845, output treesize:36 [2021-06-05 16:40:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:22,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825783365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:22,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:22,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 16:40:22,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237630317] [2021-06-05 16:40:22,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:40:22,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:22,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:40:22,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:40:22,667 INFO L87 Difference]: Start difference. First operand 43990 states and 169835 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:23,569 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-06-05 16:40:23,857 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 73 [2021-06-05 16:40:24,375 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-05 16:40:25,429 WARN L205 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 102 [2021-06-05 16:40:26,156 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 85 [2021-06-05 16:40:26,513 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 84 [2021-06-05 16:40:26,785 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-06-05 16:40:27,860 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 129 DAG size of output: 100 [2021-06-05 16:40:28,697 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 128 [2021-06-05 16:40:28,907 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2021-06-05 16:40:29,217 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 77 [2021-06-05 16:40:29,351 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2021-06-05 16:40:29,504 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-06-05 16:40:30,888 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 149 DAG size of output: 115 [2021-06-05 16:40:31,071 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 16:40:31,925 WARN L205 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 105 [2021-06-05 16:40:32,363 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 87 [2021-06-05 16:40:32,672 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2021-06-05 16:40:33,659 WARN L205 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 114 [2021-06-05 16:40:34,992 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 221 DAG size of output: 143 [2021-06-05 16:40:35,317 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-06-05 16:40:36,390 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 132 DAG size of output: 103 [2021-06-05 16:40:37,350 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 131 [2021-06-05 16:40:37,917 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2021-06-05 16:40:38,311 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 114 [2021-06-05 16:40:38,551 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 16:40:39,614 WARN L205 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 117 [2021-06-05 16:40:40,216 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 125 [2021-06-05 16:40:40,502 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-06-05 16:40:40,923 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 118 [2021-06-05 16:40:42,029 WARN L205 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 130 [2021-06-05 16:40:42,712 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 126 [2021-06-05 16:40:43,492 WARN L205 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 123 [2021-06-05 16:40:44,113 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 195 [2021-06-05 16:40:44,857 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 195 [2021-06-05 16:40:45,565 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 188 [2021-06-05 16:40:46,119 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 192 [2021-06-05 16:40:46,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:46,452 INFO L93 Difference]: Finished difference Result 69300 states and 257529 transitions. [2021-06-05 16:40:46,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:40:46,453 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:40:46,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:46,623 INFO L225 Difference]: With dead ends: 69300 [2021-06-05 16:40:46,623 INFO L226 Difference]: Without dead ends: 69270 [2021-06-05 16:40:46,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 23565.8ms TimeCoverageRelationStatistics Valid=668, Invalid=5184, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:40:46,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69270 states. [2021-06-05 16:40:47,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69270 to 44041. [2021-06-05 16:40:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44041 states, 44040 states have (on average 3.86030881017257) internal successors, (170008), 44040 states have internal predecessors, (170008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44041 states to 44041 states and 170008 transitions. [2021-06-05 16:40:48,110 INFO L78 Accepts]: Start accepts. Automaton has 44041 states and 170008 transitions. Word has length 30 [2021-06-05 16:40:48,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:48,110 INFO L482 AbstractCegarLoop]: Abstraction has 44041 states and 170008 transitions. [2021-06-05 16:40:48,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:48,110 INFO L276 IsEmpty]: Start isEmpty. Operand 44041 states and 170008 transitions. [2021-06-05 16:40:48,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:40:48,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:48,186 INFO L521 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] [2021-06-05 16:40:48,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4601,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:48,386 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:48,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:48,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1938529707, now seen corresponding path program 174 times [2021-06-05 16:40:48,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:48,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144751950] [2021-06-05 16:40:48,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:48,662 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2021-06-05 16:40:48,897 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-06-05 16:40:49,102 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-05 16:40:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:49,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:49,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144751950] [2021-06-05 16:40:49,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144751950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:49,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886343235] [2021-06-05 16:40:49,266 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 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 [2021-06-05 16:40:49,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:40:49,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:49,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:40:49,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:49,611 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-05 16:40:49,797 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 16:40:50,497 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:40:51,685 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 186 DAG size of output: 138 [2021-06-05 16:40:52,366 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 99 [2021-06-05 16:40:52,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:52,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:52,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:52,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:52,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:40:52,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:52,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:52,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:52,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:52,485 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 [2021-06-05 16:40:52,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:52,956 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 114 [2021-06-05 16:40:52,956 INFO L628 ElimStorePlain]: treesize reduction 134, result has 68.8 percent of original size [2021-06-05 16:40:52,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:52,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:52,964 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 30 treesize of output 16 [2021-06-05 16:40:52,965 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:53,090 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 16:40:53,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:40:53,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:53,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:53,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:53,098 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 30 treesize of output 16 [2021-06-05 16:40:53,099 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:53,221 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 16:40:53,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:40:53,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:53,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:53,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:53,229 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:40:53,230 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:53,338 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 16:40:53,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:40:53,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:53,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:53,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:40:53,346 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:53,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:40:53,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:53,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:53,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:53,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:53,454 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 35 treesize of output 19 [2021-06-05 16:40:53,456 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:53,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:53,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:53,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:40:53,463 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:53,664 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 16:40:53,664 INFO L628 ElimStorePlain]: treesize reduction 16, result has 89.9 percent of original size [2021-06-05 16:40:53,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:53,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:53,669 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 26 treesize of output 16 [2021-06-05 16:40:53,671 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:53,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:40:53,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 7 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:40:53,730 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 21 variables, input treesize:502, output treesize:39 [2021-06-05 16:40:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:53,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886343235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:53,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:53,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 16:40:53,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255123427] [2021-06-05 16:40:53,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:40:53,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:53,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:40:53,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:40:53,778 INFO L87 Difference]: Start difference. First operand 44041 states and 170008 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) [2021-06-05 16:40:53,965 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 35 [2021-06-05 16:40:54,252 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2021-06-05 16:40:54,632 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-06-05 16:40:54,939 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 16:40:55,121 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-06-05 16:40:55,312 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 60 [2021-06-05 16:40:55,576 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 58 [2021-06-05 16:40:55,750 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2021-06-05 16:40:56,489 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 85 [2021-06-05 16:40:57,164 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 79 [2021-06-05 16:40:57,347 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2021-06-05 16:40:58,518 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 156 DAG size of output: 128 [2021-06-05 16:40:59,572 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 160 DAG size of output: 129 [2021-06-05 16:40:59,724 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 16:41:00,390 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 90 [2021-06-05 16:41:01,584 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 164 DAG size of output: 127 [2021-06-05 16:41:02,754 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 160 DAG size of output: 126 [2021-06-05 16:41:03,047 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-06-05 16:41:03,206 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2021-06-05 16:41:03,593 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 16:41:04,371 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 111 [2021-06-05 16:41:04,571 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2021-06-05 16:41:04,962 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-05 16:41:05,206 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-06-05 16:41:06,099 WARN L205 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 126 [2021-06-05 16:41:06,343 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-06-05 16:41:06,564 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2021-06-05 16:41:06,783 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2021-06-05 16:41:06,976 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2021-06-05 16:41:07,249 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2021-06-05 16:41:07,439 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-06-05 16:41:07,644 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2021-06-05 16:41:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:07,839 INFO L93 Difference]: Finished difference Result 57596 states and 215241 transitions. [2021-06-05 16:41:07,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:41:07,839 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 [2021-06-05 16:41:07,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:08,139 INFO L225 Difference]: With dead ends: 57596 [2021-06-05 16:41:08,139 INFO L226 Difference]: Without dead ends: 57461 [2021-06-05 16:41:08,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 15743.6ms TimeCoverageRelationStatistics Valid=682, Invalid=2858, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:41:08,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57461 states. [2021-06-05 16:41:08,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57461 to 44285. [2021-06-05 16:41:08,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44285 states, 44284 states have (on average 3.85920422726041) internal successors, (170901), 44284 states have internal predecessors, (170901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:09,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44285 states to 44285 states and 170901 transitions. [2021-06-05 16:41:09,108 INFO L78 Accepts]: Start accepts. Automaton has 44285 states and 170901 transitions. Word has length 30 [2021-06-05 16:41:09,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:09,108 INFO L482 AbstractCegarLoop]: Abstraction has 44285 states and 170901 transitions. [2021-06-05 16:41:09,108 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) [2021-06-05 16:41:09,108 INFO L276 IsEmpty]: Start isEmpty. Operand 44285 states and 170901 transitions. [2021-06-05 16:41:09,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:41:09,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:09,181 INFO L521 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] [2021-06-05 16:41:09,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4625,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:09,382 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:09,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:09,382 INFO L82 PathProgramCache]: Analyzing trace with hash -806056025, now seen corresponding path program 175 times [2021-06-05 16:41:09,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:09,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463697333] [2021-06-05 16:41:09,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:09,636 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2021-06-05 16:41:10,082 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 16:41:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:10,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:10,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463697333] [2021-06-05 16:41:10,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463697333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:10,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452461401] [2021-06-05 16:41:10,281 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 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 [2021-06-05 16:41:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:10,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:41:10,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:11,330 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 16:41:12,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,068 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 [2021-06-05 16:41:12,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,083 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 [2021-06-05 16:41:12,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,097 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 [2021-06-05 16:41:12,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,111 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 57 treesize of output 22 [2021-06-05 16:41:12,112 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 22 [2021-06-05 16:41:12,128 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,142 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 [2021-06-05 16:41:12,143 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,159 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 [2021-06-05 16:41:12,160 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,176 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 [2021-06-05 16:41:12,177 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,192 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 22 [2021-06-05 16:41:12,193 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,210 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 [2021-06-05 16:41:12,212 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,227 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 19 [2021-06-05 16:41:12,228 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,244 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 [2021-06-05 16:41:12,245 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,260 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 [2021-06-05 16:41:12,261 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,276 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 [2021-06-05 16:41:12,277 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,293 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 [2021-06-05 16:41:12,294 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,314 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 [2021-06-05 16:41:12,314 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,337 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 55 treesize of output 25 [2021-06-05 16:41:12,338 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,359 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 [2021-06-05 16:41:12,360 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,381 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 [2021-06-05 16:41:12,382 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,403 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 [2021-06-05 16:41:12,404 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,427 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 55 treesize of output 25 [2021-06-05 16:41:12,428 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,449 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 [2021-06-05 16:41:12,450 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,470 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 [2021-06-05 16:41:12,471 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,493 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 [2021-06-05 16:41:12,494 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,515 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 [2021-06-05 16:41:12,516 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 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 19 [2021-06-05 16:41:12,539 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,558 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 [2021-06-05 16:41:12,559 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,573 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 19 [2021-06-05 16:41:12,574 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,588 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 [2021-06-05 16:41:12,589 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,603 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 [2021-06-05 16:41:12,603 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,623 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 [2021-06-05 16:41:12,624 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,640 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 [2021-06-05 16:41:12,641 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,656 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 [2021-06-05 16:41:12,657 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,671 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 [2021-06-05 16:41:12,672 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,686 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 [2021-06-05 16:41:12,687 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,701 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 57 treesize of output 25 [2021-06-05 16:41:12,702 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,715 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 [2021-06-05 16:41:12,716 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,731 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 [2021-06-05 16:41:12,733 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,748 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 [2021-06-05 16:41:12,748 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,764 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 [2021-06-05 16:41:12,764 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,787 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 55 treesize of output 25 [2021-06-05 16:41:12,788 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,801 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 [2021-06-05 16:41:12,801 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,815 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 [2021-06-05 16:41:12,815 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,828 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 [2021-06-05 16:41:12,829 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,842 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 [2021-06-05 16:41:12,843 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,856 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 57 treesize of output 25 [2021-06-05 16:41:12,857 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,869 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 53 treesize of output 25 [2021-06-05 16:41:12,870 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,882 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 55 treesize of output 22 [2021-06-05 16:41:12,883 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 25 [2021-06-05 16:41:12,896 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,908 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 [2021-06-05 16:41:12,908 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,920 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 22 [2021-06-05 16:41:12,921 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 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 [2021-06-05 16:41:12,934 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,946 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 [2021-06-05 16:41:12,947 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,959 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 55 treesize of output 19 [2021-06-05 16:41:12,960 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,971 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 [2021-06-05 16:41:12,972 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,983 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 [2021-06-05 16:41:12,984 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:12,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:12,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:12,996 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 [2021-06-05 16:41:12,996 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:13,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,008 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 [2021-06-05 16:41:13,008 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:13,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,019 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 [2021-06-05 16:41:13,020 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:13,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,031 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 22 [2021-06-05 16:41:13,032 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:13,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,042 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 [2021-06-05 16:41:13,043 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:13,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,054 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 [2021-06-05 16:41:13,054 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:13,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:13,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:13,059 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 44 treesize of output 22 [2021-06-05 16:41:13,060 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:13,092 INFO L628 ElimStorePlain]: treesize reduction 116, result has 15.3 percent of original size [2021-06-05 16:41:13,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:41:13,093 INFO L247 ElimStorePlain]: Needed 64 recursive calls to eliminate 2 variables, input treesize:3424, output treesize:15 [2021-06-05 16:41:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:13,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452461401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:13,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:13,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 16:41:13,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58857527] [2021-06-05 16:41:13,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:41:13,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:13,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:41:13,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:41:13,125 INFO L87 Difference]: Start difference. First operand 44285 states and 170901 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) [2021-06-05 16:41:14,118 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 78 [2021-06-05 16:41:14,496 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 72 [2021-06-05 16:41:14,911 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 74 [2021-06-05 16:41:15,475 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 77 [2021-06-05 16:41:15,752 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 88 [2021-06-05 16:41:16,118 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 81 [2021-06-05 16:41:16,705 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 75 [2021-06-05 16:41:17,092 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 84 [2021-06-05 16:41:17,286 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-05 16:41:17,595 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 77 [2021-06-05 16:41:17,822 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 80 [2021-06-05 16:41:18,083 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 85 [2021-06-05 16:41:18,337 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-05 16:41:18,769 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2021-06-05 16:41:19,248 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 78 [2021-06-05 16:41:19,549 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 84 [2021-06-05 16:41:20,377 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-06-05 16:41:20,553 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 16:41:21,125 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-06-05 16:41:21,337 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-05 16:41:21,459 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 16:41:21,684 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-05 16:41:21,983 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-05 16:41:22,237 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-06-05 16:41:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:22,597 INFO L93 Difference]: Finished difference Result 63426 states and 236013 transitions. [2021-06-05 16:41:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 16:41:22,597 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 [2021-06-05 16:41:22,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:22,753 INFO L225 Difference]: With dead ends: 63426 [2021-06-05 16:41:22,754 INFO L226 Difference]: Without dead ends: 63396 [2021-06-05 16:41:22,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 9212.8ms TimeCoverageRelationStatistics Valid=936, Invalid=5870, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 16:41:22,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63396 states. [2021-06-05 16:41:23,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63396 to 44329. [2021-06-05 16:41:23,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44329 states, 44328 states have (on average 3.859389099440534) internal successors, (171079), 44328 states have internal predecessors, (171079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44329 states to 44329 states and 171079 transitions. [2021-06-05 16:41:23,986 INFO L78 Accepts]: Start accepts. Automaton has 44329 states and 171079 transitions. Word has length 30 [2021-06-05 16:41:23,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:23,986 INFO L482 AbstractCegarLoop]: Abstraction has 44329 states and 171079 transitions. [2021-06-05 16:41:23,986 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) [2021-06-05 16:41:23,986 INFO L276 IsEmpty]: Start isEmpty. Operand 44329 states and 171079 transitions. [2021-06-05 16:41:24,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:41:24,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:24,057 INFO L521 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] [2021-06-05 16:41:24,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4654,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:24,257 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:24,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:24,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1782374869, now seen corresponding path program 176 times [2021-06-05 16:41:24,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:24,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763313674] [2021-06-05 16:41:24,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:24,569 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-06-05 16:41:24,686 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-06-05 16:41:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:24,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:24,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763313674] [2021-06-05 16:41:24,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763313674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:24,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686162552] [2021-06-05 16:41:24,828 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 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 [2021-06-05 16:41:24,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:41:24,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:24,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:41:24,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:25,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,468 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:25,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:41:25,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:25,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,502 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 16:41:25,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 33 [2021-06-05 16:41:25,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:25,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,544 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 16:41:25,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 39 [2021-06-05 16:41:25,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:25,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,576 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:25,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:41:25,577 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:25,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,604 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:25,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:41:25,606 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:25,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,645 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:41:25,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:41:25,650 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:25,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,679 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:25,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:41:25,680 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:25,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,712 INFO L354 Elim1Store]: treesize reduction 23, result has 14.8 percent of original size [2021-06-05 16:41:25,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 29 [2021-06-05 16:41:25,714 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:25,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,741 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:25,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:41:25,742 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:25,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,780 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-06-05 16:41:25,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2021-06-05 16:41:25,781 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:25,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,821 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-06-05 16:41:25,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 16:41:25,822 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:25,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,862 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:41:25,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-06-05 16:41:25,867 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:25,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,894 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:25,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:41:25,895 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:25,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,923 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:25,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:41:25,924 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:25,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,952 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:25,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:41:25,953 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:25,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,982 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:25,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:41:25,983 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:25,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:25,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,012 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:41:26,013 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,041 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 16:41:26,042 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,070 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:41:26,071 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,097 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:41:26,098 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,127 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 1 [2021-06-05 16:41:26,128 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,332 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:41:26,333 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,369 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 16:41:26,372 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,401 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:41:26,402 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,427 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:41:26,428 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,454 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:41:26,455 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:41:26,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 42 [2021-06-05 16:41:26,501 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,538 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 16:41:26,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 30 [2021-06-05 16:41:26,540 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,565 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:41:26,566 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,592 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:41:26,593 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,620 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 1 [2021-06-05 16:41:26,621 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,645 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:41:26,646 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,673 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 16:41:26,674 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,710 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 16:41:26,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 28 [2021-06-05 16:41:26,712 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,739 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 16:41:26,741 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,766 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:41:26,767 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,795 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 1 [2021-06-05 16:41:26,796 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,824 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:41:26,825 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,850 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:41:26,851 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,874 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:41:26,875 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,897 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:41:26,897 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,922 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 16:41:26,923 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,945 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:41:26,946 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,969 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:26,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:41:26,970 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:26,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:26,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,009 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:41:27,010 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,036 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:41:27,037 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,062 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:41:27,064 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,091 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 16:41:27,092 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,117 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 16:41:27,118 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,144 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 16:41:27,145 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,170 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:41:27,172 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,198 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:41:27,199 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,223 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 25 [2021-06-05 16:41:27,223 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,250 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:41:27,251 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,277 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:41:27,278 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,304 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:41:27,305 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,333 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:41:27,334 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,362 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 1 [2021-06-05 16:41:27,363 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,389 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:41:27,390 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,414 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:41:27,415 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,440 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 1 [2021-06-05 16:41:27,440 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,464 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:41:27,465 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,487 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 1 [2021-06-05 16:41:27,488 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:41:27,500 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:41:27,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:41:27,501 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:27,588 INFO L628 ElimStorePlain]: treesize reduction 139, result has 35.9 percent of original size [2021-06-05 16:41:27,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:41:27,589 INFO L247 ElimStorePlain]: Needed 65 recursive calls to eliminate 1 variables, input treesize:3409, output treesize:78 [2021-06-05 16:41:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:27,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686162552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:27,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:27,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 16:41:27,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175913483] [2021-06-05 16:41:27,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:41:27,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:27,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:41:27,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:41:27,692 INFO L87 Difference]: Start difference. First operand 44329 states and 171079 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) [2021-06-05 16:41:29,045 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-05 16:41:29,555 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2021-06-05 16:41:30,235 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 78 [2021-06-05 16:41:30,947 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-06-05 16:41:31,202 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2021-06-05 16:41:31,529 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-06-05 16:41:31,726 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-05 16:41:31,937 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2021-06-05 16:41:32,302 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-05 16:41:32,620 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2021-06-05 16:41:32,949 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2021-06-05 16:41:33,684 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2021-06-05 16:41:34,097 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2021-06-05 16:41:34,463 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2021-06-05 16:41:34,739 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 16:41:35,078 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-06-05 16:41:35,289 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-06-05 16:41:35,570 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 95 [2021-06-05 16:41:35,831 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 16:41:36,067 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2021-06-05 16:41:36,660 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 86 [2021-06-05 16:41:36,940 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-06-05 16:41:37,399 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 99 [2021-06-05 16:41:37,750 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 87 [2021-06-05 16:41:37,976 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2021-06-05 16:41:38,350 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 90 [2021-06-05 16:41:38,664 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 97 [2021-06-05 16:41:38,830 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-06-05 16:41:39,012 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 16:41:39,260 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-06-05 16:41:39,641 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 88 [2021-06-05 16:41:40,055 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2021-06-05 16:41:40,383 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-06-05 16:41:40,857 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 101 [2021-06-05 16:41:41,381 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 107 [2021-06-05 16:41:41,578 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 16:41:41,853 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-06-05 16:41:42,079 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-06-05 16:41:42,443 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 100 [2021-06-05 16:41:42,951 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2021-06-05 16:41:43,209 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-06-05 16:41:43,580 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2021-06-05 16:41:43,859 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2021-06-05 16:41:44,071 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 16:41:44,451 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 102 [2021-06-05 16:41:45,144 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 113 [2021-06-05 16:41:45,481 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 103 [2021-06-05 16:41:45,969 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 123 [2021-06-05 16:41:46,145 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2021-06-05 16:41:46,739 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 106 Received shutdown request... [2021-06-05 16:41:47,077 WARN L222 SmtUtils]: Removed 6 from assertion stack [2021-06-05 16:41:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 16:41:47,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5010 [2021-06-05 16:41:47,281 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 16:41:47,283 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 16:41:47,285 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 16:41:47,285 INFO L202 PluginConnector]: Adding new model max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:41:47 BasicIcfg [2021-06-05 16:41:47,285 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 16:41:47,285 INFO L168 Benchmark]: Toolchain (without parser) took 760852.07 ms. Allocated memory was 354.4 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 333.6 MB in the beginning and 10.8 GB in the end (delta: -10.4 GB). Peak memory consumption was 5.1 GB. Max. memory is 16.0 GB. [2021-06-05 16:41:47,285 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 354.4 MB. Free memory was 334.8 MB in the beginning and 334.7 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:41:47,285 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.51 ms. Allocated memory is still 354.4 MB. Free memory was 333.5 MB in the beginning and 332.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:41:47,285 INFO L168 Benchmark]: Boogie Preprocessor took 12.58 ms. Allocated memory is still 354.4 MB. Free memory was 332.1 MB in the beginning and 331.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 16:41:47,285 INFO L168 Benchmark]: RCFGBuilder took 337.25 ms. Allocated memory is still 354.4 MB. Free memory was 330.9 MB in the beginning and 318.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 16:41:47,285 INFO L168 Benchmark]: TraceAbstraction took 760478.67 ms. Allocated memory was 354.4 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 317.9 MB in the beginning and 10.8 GB in the end (delta: -10.4 GB). Peak memory consumption was 5.1 GB. Max. memory is 16.0 GB. [2021-06-05 16:41:47,286 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 354.4 MB. Free memory was 334.8 MB in the beginning and 334.7 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.51 ms. Allocated memory is still 354.4 MB. Free memory was 333.5 MB in the beginning and 332.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.58 ms. Allocated memory is still 354.4 MB. Free memory was 332.1 MB in the beginning and 331.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 337.25 ms. Allocated memory is still 354.4 MB. Free memory was 330.9 MB in the beginning and 318.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 760478.67 ms. Allocated memory was 354.4 MB in the beginning and 15.9 GB in the end (delta: 15.5 GB). Free memory was 317.9 MB in the beginning and 10.8 GB in the end (delta: -10.4 GB). Peak memory consumption was 5.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (44329states) and FLOYD_HOARE automaton (currently 102 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 98 for 136ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (44329states) and FLOYD_HOARE automaton (currently 102 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 98 for 136ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (44329states) and FLOYD_HOARE automaton (currently 102 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 98 for 136ms.. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (44329states) and FLOYD_HOARE automaton (currently 102 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 98 for 136ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 760379.1ms, OverallIterations: 259, TraceHistogramMax: 3, EmptinessCheckTime: 5558.6ms, AutomataDifference: 416006.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 58.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11892 SDtfs, 75547 SDslu, 92277 SDs, 0 SdLazy, 149412 SolverSat, 13738 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 82544.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17028 GetRequests, 5447 SyntacticMatches, 250 SemanticMatches, 11330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199171 ImplicationChecksByTransitivity, 354541.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48550occurred in iteration=248, InterpolantAutomatonStates: 9994, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 89817.2ms AutomataMinimizationTime, 258 MinimizatonAttempts, 1353566 StatesRemovedByMinimization, 258 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 791.2ms SsaConstructionTime, 2629.2ms SatisfiabilityAnalysisTime, 188036.3ms InterpolantComputationTime, 13778 NumberOfCodeBlocks, 13778 NumberOfCodeBlocksAsserted, 894 NumberOfCheckSat, 13263 ConstructedInterpolants, 193 QuantifiedInterpolants, 218487 SizeOfPredicates, 1049 NumberOfNonLiveVariables, 17406 ConjunctsInSsa, 3745 ConjunctsInUnsatCore, 515 InterpolantComputations, 3 PerfectInterpolantSequences, 1001/4406 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown