/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 16:35:37,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 16:35:37,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 16:35:37,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 16:35:38,004 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.epf [2021-05-03 16:35:38,025 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 16:35:38,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 16:35:38,025 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 16:35:38,025 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 16:35:38,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 16:35:38,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 16:35:38,027 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 16:35:38,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 16:35:38,027 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 16:35:38,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 16:35:38,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 16:35:38,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 16:35:38,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 16:35:38,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 16:35:38,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 16:35:38,028 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 16:35:38,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 16:35:38,028 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 16:35:38,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 16:35:38,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 16:35:38,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 16:35:38,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 16:35:38,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 16:35:38,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:35:38,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 16:35:38,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 16:35:38,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 16:35:38,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 16:35:38,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 16:35:38,030 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 16:35:38,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 16:35:38,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 16:35:38,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 16:35:38,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 16:35:38,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 16:35:38,393 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 16:35:38,397 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 16:35:38,398 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl [2021-05-03 16:35:38,408 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl' [2021-05-03 16:35:38,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 16:35:38,446 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 16:35:38,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 16:35:38,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 16:35:38,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 16:35:38,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:35:38" (1/1) ... [2021-05-03 16:35:38,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:35:38" (1/1) ... [2021-05-03 16:35:38,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 16:35:38,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 16:35:38,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 16:35:38,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 16:35:38,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:35:38" (1/1) ... [2021-05-03 16:35:38,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:35:38" (1/1) ... [2021-05-03 16:35:38,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:35:38" (1/1) ... [2021-05-03 16:35:38,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:35:38" (1/1) ... [2021-05-03 16:35:38,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:35:38" (1/1) ... [2021-05-03 16:35:38,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:35:38" (1/1) ... [2021-05-03 16:35:38,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:35:38" (1/1) ... [2021-05-03 16:35:38,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 16:35:38,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 16:35:38,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 16:35:38,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 16:35:38,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:35:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:35:38,569 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 16:35:38,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 16:35:38,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 16:35:38,570 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 16:35:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 16:35:38,570 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 16:35:38,570 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 16:35:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 16:35:38,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 16:35:38,570 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 16:35:38,571 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 16:35:38,571 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 16:35:38,572 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 16:35:38,865 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 16:35:38,865 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 16:35:38,867 INFO L202 PluginConnector]: Adding new model max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:35:38 BoogieIcfgContainer [2021-05-03 16:35:38,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 16:35:38,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 16:35:38,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 16:35:38,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 16:35:38,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:35:38" (1/2) ... [2021-05-03 16:35:38,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405dca66 and model type max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 04:35:38, skipping insertion in model container [2021-05-03 16:35:38,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:35:38" (2/2) ... [2021-05-03 16:35:38,874 INFO L111 eAbstractionObserver]: Analyzing ICFG max-array-hom.wvr.bpl [2021-05-03 16:35:38,895 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 16:35:38,895 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 16:35:38,899 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 16:35:38,899 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 16:35:38,986 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-03 16:35:39,011 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-03 16:35:39,051 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 16:35:39,051 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 16:35:39,051 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 16:35:39,052 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 16:35:39,052 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 16:35:39,052 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 16:35:39,052 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 16:35:39,052 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 16:35:39,066 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-05-03 16:35:39,091 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) [2021-05-03 16:35:39,093 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) [2021-05-03 16:35:39,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 16:35:39,103 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:39,105 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:35:39,106 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:39,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:39,112 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-05-03 16:35:39,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:39,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861343164] [2021-05-03 16:35:39,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:39,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861343164] [2021-05-03 16:35:39,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:35:39,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:35:39,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944749543] [2021-05-03 16:35:39,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:35:39,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:39,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:35:39,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:35:39,346 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) [2021-05-03 16:35:39,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:39,374 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-05-03 16:35:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:35:39,375 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 [2021-05-03 16:35:39,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:39,386 INFO L225 Difference]: With dead ends: 217 [2021-05-03 16:35:39,386 INFO L226 Difference]: Without dead ends: 202 [2021-05-03 16:35:39,387 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:35:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-03 16:35:39,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-05-03 16:35:39,430 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) [2021-05-03 16:35:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-05-03 16:35:39,434 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-05-03 16:35:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:39,435 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-05-03 16:35:39,435 INFO L481 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) [2021-05-03 16:35:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-05-03 16:35:39,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 16:35:39,437 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:39,437 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:35:39,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 16:35:39,438 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:39,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:39,439 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-05-03 16:35:39,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:39,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517356672] [2021-05-03 16:35:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:35:39,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517356672] [2021-05-03 16:35:39,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:35:39,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 16:35:39,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138753469] [2021-05-03 16:35:39,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:35:39,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:39,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:35:39,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:35:39,484 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) [2021-05-03 16:35:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:39,523 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-05-03 16:35:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:35:39,524 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 [2021-05-03 16:35:39,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:39,526 INFO L225 Difference]: With dead ends: 158 [2021-05-03 16:35:39,526 INFO L226 Difference]: Without dead ends: 158 [2021-05-03 16:35:39,527 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:35:39,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-03 16:35:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-05-03 16:35:39,539 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) [2021-05-03 16:35:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-05-03 16:35:39,541 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-05-03 16:35:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:39,541 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-05-03 16:35:39,541 INFO L481 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) [2021-05-03 16:35:39,541 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-05-03 16:35:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 16:35:39,543 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:39,543 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:35:39,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 16:35:39,543 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:39,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:39,544 INFO L82 PathProgramCache]: Analyzing trace with hash 275548602, now seen corresponding path program 1 times [2021-05-03 16:35:39,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:39,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305941947] [2021-05-03 16:35:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:35:39,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305941947] [2021-05-03 16:35:39,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:35:39,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 16:35:39,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74799260] [2021-05-03 16:35:39,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 16:35:39,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:39,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 16:35:39,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:35:39,596 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) [2021-05-03 16:35:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:39,652 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-05-03 16:35:39,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 16:35:39,652 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 [2021-05-03 16:35:39,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:39,656 INFO L225 Difference]: With dead ends: 183 [2021-05-03 16:35:39,656 INFO L226 Difference]: Without dead ends: 183 [2021-05-03 16:35:39,657 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:35:39,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-03 16:35:39,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-05-03 16:35:39,678 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) [2021-05-03 16:35:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-05-03 16:35:39,679 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-05-03 16:35:39,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:39,680 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-05-03 16:35:39,680 INFO L481 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) [2021-05-03 16:35:39,680 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-05-03 16:35:39,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:35:39,681 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:39,682 INFO L551 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] [2021-05-03 16:35:39,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 16:35:39,682 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:39,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:39,683 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-05-03 16:35:39,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:39,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227142780] [2021-05-03 16:35:39,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:40,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227142780] [2021-05-03 16:35:40,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190414266] [2021-05-03 16:35:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:40,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:35:40,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:40,587 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 [2021-05-03 16:35:40,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:40,593 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 [2021-05-03 16:35:40,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:40,596 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 [2021-05-03 16:35:40,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:40,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:35:40,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:35:40,613 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:103, output treesize:21 [2021-05-03 16:35:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:40,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:40,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:35:40,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542143483] [2021-05-03 16:35:40,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:35:40,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:40,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:35:40,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:35:40,653 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) [2021-05-03 16:35:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:40,902 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-05-03 16:35:40,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:35:40,903 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 [2021-05-03 16:35:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:40,905 INFO L225 Difference]: With dead ends: 330 [2021-05-03 16:35:40,905 INFO L226 Difference]: Without dead ends: 315 [2021-05-03 16:35:40,905 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 511.4ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:35:40,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-05-03 16:35:40,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-05-03 16:35:40,917 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) [2021-05-03 16:35:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-05-03 16:35:40,919 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-05-03 16:35:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:40,919 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-05-03 16:35:40,919 INFO L481 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) [2021-05-03 16:35:40,919 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-05-03 16:35:40,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:35:40,921 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:40,921 INFO L551 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] [2021-05-03 16:35:41,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:41,137 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:41,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:41,138 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-05-03 16:35:41,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:41,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277176043] [2021-05-03 16:35:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:41,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277176043] [2021-05-03 16:35:41,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127213582] [2021-05-03 16:35:41,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:41,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:35:41,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:35:41,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:35:41,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:41,790 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:35:41,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-05-03 16:35:41,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:41,804 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:35:41,805 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 [2021-05-03 16:35:41,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:41,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:35:41,820 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 [2021-05-03 16:35:41,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:41,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:35:41,831 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 [2021-05-03 16:35:41,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:41,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:35:41,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:35:41,912 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:125, output treesize:83 [2021-05-03 16:35:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:42,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:42,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-05-03 16:35:42,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543447102] [2021-05-03 16:35:42,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:35:42,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:42,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:35:42,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:35:42,042 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) [2021-05-03 16:35:42,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:42,590 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-05-03 16:35:42,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:35:42,591 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 [2021-05-03 16:35:42,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:42,593 INFO L225 Difference]: With dead ends: 374 [2021-05-03 16:35:42,593 INFO L226 Difference]: Without dead ends: 359 [2021-05-03 16:35:42,594 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 684.9ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:35:42,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-03 16:35:42,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-05-03 16:35:42,601 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) [2021-05-03 16:35:42,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-05-03 16:35:42,603 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-05-03 16:35:42,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:42,603 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-05-03 16:35:42,603 INFO L481 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) [2021-05-03 16:35:42,603 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-05-03 16:35:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:35:42,604 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:42,605 INFO L551 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] [2021-05-03 16:35:42,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:42,821 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:42,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:42,821 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-05-03 16:35:42,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:42,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832093912] [2021-05-03 16:35:42,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:43,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832093912] [2021-05-03 16:35:43,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209763125] [2021-05-03 16:35:43,061 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 [2021-05-03 16:35:43,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 16:35:43,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:35:43,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 16:35:43,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:43,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 16:35:43,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:43,239 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 [2021-05-03 16:35:43,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:43,244 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 [2021-05-03 16:35:43,245 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:43,248 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 [2021-05-03 16:35:43,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:43,252 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 [2021-05-03 16:35:43,253 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:43,261 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 [2021-05-03 16:35:43,262 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:43,287 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-05-03 16:35:43,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:35:43,289 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:145, output treesize:21 [2021-05-03 16:35:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:43,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:43,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 16:35:43,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109845175] [2021-05-03 16:35:43,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:35:43,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:43,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:35:43,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:35:43,338 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) [2021-05-03 16:35:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:43,522 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-05-03 16:35:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:35:43,522 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 [2021-05-03 16:35:43,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:43,524 INFO L225 Difference]: With dead ends: 296 [2021-05-03 16:35:43,524 INFO L226 Difference]: Without dead ends: 281 [2021-05-03 16:35:43,524 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 336.5ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:35:43,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-03 16:35:43,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-05-03 16:35:43,530 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) [2021-05-03 16:35:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-05-03 16:35:43,532 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-05-03 16:35:43,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:43,532 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-05-03 16:35:43,532 INFO L481 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) [2021-05-03 16:35:43,532 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-05-03 16:35:43,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:35:43,533 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:43,533 INFO L551 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] [2021-05-03 16:35:43,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-03 16:35:43,754 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:43,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:43,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-05-03 16:35:43,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:43,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835323465] [2021-05-03 16:35:43,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:43,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835323465] [2021-05-03 16:35:43,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914125902] [2021-05-03 16:35:43,988 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) [2021-05-03 16:35:44,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:35:44,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:44,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:35:44,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:44,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:35:44,253 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 [2021-05-03 16:35:44,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:44,273 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:35:44,273 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 [2021-05-03 16:35:44,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:44,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:35:44,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:35:44,348 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 [2021-05-03 16:35:44,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:44,360 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:35:44,360 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 [2021-05-03 16:35:44,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:44,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:35:44,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:35:44,461 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:83 [2021-05-03 16:35:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:44,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:44,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:35:44,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044012184] [2021-05-03 16:35:44,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:35:44,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:44,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:35:44,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:35:44,604 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) [2021-05-03 16:35:44,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:44,993 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-05-03 16:35:44,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:35:44,994 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 [2021-05-03 16:35:44,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:44,996 INFO L225 Difference]: With dead ends: 425 [2021-05-03 16:35:44,996 INFO L226 Difference]: Without dead ends: 410 [2021-05-03 16:35:44,997 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 545.9ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:35:44,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-05-03 16:35:45,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-05-03 16:35:45,004 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) [2021-05-03 16:35:45,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-05-03 16:35:45,005 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-05-03 16:35:45,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:45,005 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-05-03 16:35:45,005 INFO L481 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) [2021-05-03 16:35:45,005 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-05-03 16:35:45,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:35:45,006 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:45,006 INFO L551 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] [2021-05-03 16:35:45,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:45,221 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:45,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:45,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-05-03 16:35:45,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:45,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144778207] [2021-05-03 16:35:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:45,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144778207] [2021-05-03 16:35:45,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315146821] [2021-05-03 16:35:45,276 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 [2021-05-03 16:35:45,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:35:45,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:35:45,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:35:45,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:45,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:45,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:35:45,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915149571] [2021-05-03 16:35:45,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:35:45,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:45,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:35:45,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:35:45,403 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) [2021-05-03 16:35:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:45,774 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-05-03 16:35:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:35:45,774 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 [2021-05-03 16:35:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:45,777 INFO L225 Difference]: With dead ends: 619 [2021-05-03 16:35:45,777 INFO L226 Difference]: Without dead ends: 619 [2021-05-03 16:35:45,778 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 229.4ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:35:45,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-05-03 16:35:45,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-05-03 16:35:45,787 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) [2021-05-03 16:35:45,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-05-03 16:35:45,788 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-05-03 16:35:45,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:45,788 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-05-03 16:35:45,788 INFO L481 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) [2021-05-03 16:35:45,788 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-05-03 16:35:45,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:35:45,789 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:45,789 INFO L551 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] [2021-05-03 16:35:46,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-03 16:35:46,005 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:46,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:46,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-05-03 16:35:46,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:46,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830170579] [2021-05-03 16:35:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:46,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830170579] [2021-05-03 16:35:46,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720292087] [2021-05-03 16:35:46,049 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 [2021-05-03 16:35:46,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:35:46,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:35:46,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:35:46,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:46,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:46,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:35:46,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438055632] [2021-05-03 16:35:46,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:35:46,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:46,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:35:46,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:35:46,193 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) [2021-05-03 16:35:46,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:46,978 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-05-03 16:35:46,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 16:35:46,981 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 [2021-05-03 16:35:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:46,986 INFO L225 Difference]: With dead ends: 1078 [2021-05-03 16:35:46,986 INFO L226 Difference]: Without dead ends: 1078 [2021-05-03 16:35:46,987 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 516.7ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:35:46,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-05-03 16:35:46,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-05-03 16:35:47,000 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) [2021-05-03 16:35:47,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-05-03 16:35:47,001 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-05-03 16:35:47,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:47,001 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-05-03 16:35:47,001 INFO L481 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) [2021-05-03 16:35:47,001 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-05-03 16:35:47,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:35:47,003 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:47,003 INFO L551 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] [2021-05-03 16:35:47,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:47,217 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:47,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:47,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-05-03 16:35:47,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:47,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519231855] [2021-05-03 16:35:47,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:47,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519231855] [2021-05-03 16:35:47,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349105173] [2021-05-03 16:35:47,278 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 [2021-05-03 16:35:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:47,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:35:47,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:47,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:47,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:35:47,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036012428] [2021-05-03 16:35:47,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:35:47,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:47,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:35:47,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:35:47,408 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) [2021-05-03 16:35:48,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:48,029 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-05-03 16:35:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:35:48,030 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 [2021-05-03 16:35:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:48,034 INFO L225 Difference]: With dead ends: 951 [2021-05-03 16:35:48,035 INFO L226 Difference]: Without dead ends: 951 [2021-05-03 16:35:48,035 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 410.4ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 16:35:48,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-05-03 16:35:48,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-05-03 16:35:48,046 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) [2021-05-03 16:35:48,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-05-03 16:35:48,047 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-05-03 16:35:48,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:48,047 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-05-03 16:35:48,048 INFO L481 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) [2021-05-03 16:35:48,048 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-05-03 16:35:48,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:35:48,048 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:48,049 INFO L551 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] [2021-05-03 16:35:48,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:48,265 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:48,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:48,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-05-03 16:35:48,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:48,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736553019] [2021-05-03 16:35:48,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:35:48,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736553019] [2021-05-03 16:35:48,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688956582] [2021-05-03 16:35:48,312 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 [2021-05-03 16:35:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:48,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:35:48,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:35:48,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:48,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 16:35:48,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372009537] [2021-05-03 16:35:48,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:35:48,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:48,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:35:48,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:35:48,406 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) [2021-05-03 16:35:48,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:48,521 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-05-03 16:35:48,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:35:48,521 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 [2021-05-03 16:35:48,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:48,524 INFO L225 Difference]: With dead ends: 669 [2021-05-03 16:35:48,525 INFO L226 Difference]: Without dead ends: 663 [2021-05-03 16:35:48,525 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:35:48,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-05-03 16:35:48,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-05-03 16:35:48,536 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) [2021-05-03 16:35:48,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-05-03 16:35:48,537 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-05-03 16:35:48,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:48,537 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-05-03 16:35:48,538 INFO L481 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) [2021-05-03 16:35:48,538 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-05-03 16:35:48,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:35:48,539 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:48,539 INFO L551 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] [2021-05-03 16:35:48,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-03 16:35:48,753 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:48,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:48,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-05-03 16:35:48,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:48,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528650179] [2021-05-03 16:35:48,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:48,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528650179] [2021-05-03 16:35:48,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699949542] [2021-05-03 16:35:48,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:48,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:35:48,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:35:48,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:35:48,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:48,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:48,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 16:35:48,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998969476] [2021-05-03 16:35:48,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:35:48,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:48,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:35:48,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:35:48,899 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) [2021-05-03 16:35:49,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:49,089 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-05-03 16:35:49,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:35:49,090 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 [2021-05-03 16:35:49,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:49,094 INFO L225 Difference]: With dead ends: 710 [2021-05-03 16:35:49,094 INFO L226 Difference]: Without dead ends: 672 [2021-05-03 16:35:49,095 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:35:49,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-05-03 16:35:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-05-03 16:35:49,108 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) [2021-05-03 16:35:49,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-05-03 16:35:49,110 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-05-03 16:35:49,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:49,110 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-05-03 16:35:49,110 INFO L481 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) [2021-05-03 16:35:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-05-03 16:35:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:35:49,112 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:49,112 INFO L551 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] [2021-05-03 16:35:49,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:49,329 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:49,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:49,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-05-03 16:35:49,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:49,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715220801] [2021-05-03 16:35:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:35:49,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715220801] [2021-05-03 16:35:49,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257870832] [2021-05-03 16:35:49,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:49,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:35:49,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:35:49,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:35:49,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:35:49,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:49,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 16:35:49,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577217765] [2021-05-03 16:35:49,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:35:49,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:49,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:35:49,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:35:49,464 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) [2021-05-03 16:35:49,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:49,562 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-05-03 16:35:49,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:35:49,565 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 [2021-05-03 16:35:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:49,570 INFO L225 Difference]: With dead ends: 830 [2021-05-03 16:35:49,570 INFO L226 Difference]: Without dead ends: 830 [2021-05-03 16:35:49,570 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:35:49,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-05-03 16:35:49,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-05-03 16:35:49,585 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) [2021-05-03 16:35:49,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-05-03 16:35:49,587 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-05-03 16:35:49,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:49,588 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-05-03 16:35:49,588 INFO L481 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) [2021-05-03 16:35:49,588 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-05-03 16:35:49,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:35:49,589 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:49,589 INFO L551 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] [2021-05-03 16:35:49,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-03 16:35:49,812 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:49,812 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-05-03 16:35:49,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:49,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079616237] [2021-05-03 16:35:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:49,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079616237] [2021-05-03 16:35:49,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208607875] [2021-05-03 16:35:49,872 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 [2021-05-03 16:35:49,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:35:49,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:35:49,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:35:49,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:49,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:49,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:35:49,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430428639] [2021-05-03 16:35:49,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:35:49,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:49,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:35:49,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:35:49,980 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) [2021-05-03 16:35:50,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:50,315 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-05-03 16:35:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:35:50,315 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 [2021-05-03 16:35:50,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:50,320 INFO L225 Difference]: With dead ends: 1196 [2021-05-03 16:35:50,320 INFO L226 Difference]: Without dead ends: 1196 [2021-05-03 16:35:50,321 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:35:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-05-03 16:35:50,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-05-03 16:35:50,337 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) [2021-05-03 16:35:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-05-03 16:35:50,338 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-05-03 16:35:50,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:50,338 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-05-03 16:35:50,339 INFO L481 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) [2021-05-03 16:35:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-05-03 16:35:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:35:50,340 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:50,340 INFO L551 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] [2021-05-03 16:35:50,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-03 16:35:50,553 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:50,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:50,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-05-03 16:35:50,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:50,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703986371] [2021-05-03 16:35:50,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:50,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703986371] [2021-05-03 16:35:50,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318226937] [2021-05-03 16:35:50,598 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 [2021-05-03 16:35:50,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:35:50,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:35:50,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:35:50,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:50,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:50,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:35:50,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922076146] [2021-05-03 16:35:50,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:35:50,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:50,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:35:50,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:35:50,714 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) [2021-05-03 16:35:51,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:51,136 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-05-03 16:35:51,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 16:35:51,136 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 [2021-05-03 16:35:51,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:51,142 INFO L225 Difference]: With dead ends: 1492 [2021-05-03 16:35:51,143 INFO L226 Difference]: Without dead ends: 1492 [2021-05-03 16:35:51,143 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 274.0ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:35:51,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-05-03 16:35:51,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-05-03 16:35:51,162 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) [2021-05-03 16:35:51,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-05-03 16:35:51,164 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-05-03 16:35:51,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:51,164 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-05-03 16:35:51,164 INFO L481 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) [2021-05-03 16:35:51,164 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-05-03 16:35:51,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:35:51,165 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:51,166 INFO L551 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] [2021-05-03 16:35:51,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-03 16:35:51,389 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:51,390 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-05-03 16:35:51,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:51,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070488265] [2021-05-03 16:35:51,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:51,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070488265] [2021-05-03 16:35:51,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162492412] [2021-05-03 16:35:51,432 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 [2021-05-03 16:35:51,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:35:51,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:35:51,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:35:51,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:51,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:51,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 16:35:51,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884485180] [2021-05-03 16:35:51,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:35:51,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:51,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:35:51,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:35:51,548 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) [2021-05-03 16:35:51,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:51,814 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-05-03 16:35:51,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:35:51,815 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 [2021-05-03 16:35:51,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:51,820 INFO L225 Difference]: With dead ends: 1258 [2021-05-03 16:35:51,820 INFO L226 Difference]: Without dead ends: 1248 [2021-05-03 16:35:51,821 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:35:51,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-05-03 16:35:51,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-05-03 16:35:51,839 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) [2021-05-03 16:35:51,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-05-03 16:35:51,841 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-05-03 16:35:51,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:51,842 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-05-03 16:35:51,842 INFO L481 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) [2021-05-03 16:35:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-05-03 16:35:51,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:35:51,843 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:51,843 INFO L551 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] [2021-05-03 16:35:52,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-05-03 16:35:52,065 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:52,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:52,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-05-03 16:35:52,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:52,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643584535] [2021-05-03 16:35:52,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:52,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:52,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643584535] [2021-05-03 16:35:52,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025745222] [2021-05-03 16:35:52,105 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) [2021-05-03 16:35:52,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:35:52,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:35:52,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:35:52,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:52,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:52,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 16:35:52,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777910393] [2021-05-03 16:35:52,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:35:52,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:52,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:35:52,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:35:52,231 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) [2021-05-03 16:35:52,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:52,513 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-05-03 16:35:52,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:35:52,513 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 [2021-05-03 16:35:52,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:52,518 INFO L225 Difference]: With dead ends: 1329 [2021-05-03 16:35:52,518 INFO L226 Difference]: Without dead ends: 1329 [2021-05-03 16:35:52,518 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:35:52,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-05-03 16:35:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-05-03 16:35:52,535 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) [2021-05-03 16:35:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-05-03 16:35:52,537 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-05-03 16:35:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:52,538 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-05-03 16:35:52,538 INFO L481 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) [2021-05-03 16:35:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-05-03 16:35:52,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:35:52,539 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:52,539 INFO L551 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] [2021-05-03 16:35:52,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:52,753 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:52,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:52,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-05-03 16:35:52,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:52,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23475177] [2021-05-03 16:35:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:52,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23475177] [2021-05-03 16:35:52,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103469430] [2021-05-03 16:35:52,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:52,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:35:52,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:52,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:52,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:35:52,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248779920] [2021-05-03 16:35:52,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:35:52,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:52,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:35:52,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:35:52,902 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) [2021-05-03 16:35:53,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:53,262 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-05-03 16:35:53,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:35:53,262 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 [2021-05-03 16:35:53,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:53,267 INFO L225 Difference]: With dead ends: 1548 [2021-05-03 16:35:53,267 INFO L226 Difference]: Without dead ends: 1544 [2021-05-03 16:35:53,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:35:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-05-03 16:35:53,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-05-03 16:35:53,288 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) [2021-05-03 16:35:53,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-05-03 16:35:53,290 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-05-03 16:35:53,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:53,290 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-05-03 16:35:53,290 INFO L481 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) [2021-05-03 16:35:53,290 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-05-03 16:35:53,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:35:53,292 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:53,292 INFO L551 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] [2021-05-03 16:35:53,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:53,511 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:53,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-05-03 16:35:53,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:53,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012031381] [2021-05-03 16:35:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:53,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012031381] [2021-05-03 16:35:53,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613310698] [2021-05-03 16:35:53,555 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 [2021-05-03 16:35:53,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:35:53,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:35:53,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:35:53,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:53,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:53,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:35:53,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481788152] [2021-05-03 16:35:53,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:35:53,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:53,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:35:53,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:35:53,668 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) [2021-05-03 16:35:54,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:54,420 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-05-03 16:35:54,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 16:35:54,420 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 [2021-05-03 16:35:54,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:54,432 INFO L225 Difference]: With dead ends: 2734 [2021-05-03 16:35:54,432 INFO L226 Difference]: Without dead ends: 2734 [2021-05-03 16:35:54,433 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 431.8ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:35:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-05-03 16:35:54,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-05-03 16:35:54,465 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) [2021-05-03 16:35:54,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-05-03 16:35:54,467 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-05-03 16:35:54,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:54,468 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-05-03 16:35:54,468 INFO L481 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) [2021-05-03 16:35:54,468 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-05-03 16:35:54,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:35:54,470 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:54,470 INFO L551 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] [2021-05-03 16:35:54,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:54,691 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:54,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:54,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-05-03 16:35:54,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:54,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741638472] [2021-05-03 16:35:54,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:54,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741638472] [2021-05-03 16:35:54,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239336943] [2021-05-03 16:35:54,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:54,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:35:54,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:35:54,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:35:54,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:54,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:54,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:35:54,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933741506] [2021-05-03 16:35:54,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:35:54,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:54,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:35:54,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:35:54,871 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) [2021-05-03 16:35:55,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:55,629 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-05-03 16:35:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 16:35:55,629 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 [2021-05-03 16:35:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:55,640 INFO L225 Difference]: With dead ends: 2693 [2021-05-03 16:35:55,640 INFO L226 Difference]: Without dead ends: 2693 [2021-05-03 16:35:55,641 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 487.8ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:35:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-05-03 16:35:55,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-05-03 16:35:55,671 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) [2021-05-03 16:35:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-05-03 16:35:55,673 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-05-03 16:35:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:55,673 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-05-03 16:35:55,673 INFO L481 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) [2021-05-03 16:35:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-05-03 16:35:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:35:55,675 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:55,675 INFO L551 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] [2021-05-03 16:35:55,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-03 16:35:55,890 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:55,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:55,890 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-05-03 16:35:55,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:55,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712603427] [2021-05-03 16:35:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:55,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712603427] [2021-05-03 16:35:55,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863704880] [2021-05-03 16:35:55,927 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 [2021-05-03 16:35:55,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:35:55,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:35:55,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:35:55,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:56,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:56,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:35:56,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700101531] [2021-05-03 16:35:56,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:35:56,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:56,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:35:56,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:35:56,023 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) [2021-05-03 16:35:56,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:56,617 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-05-03 16:35:56,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 16:35:56,617 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 [2021-05-03 16:35:56,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:56,622 INFO L225 Difference]: With dead ends: 2677 [2021-05-03 16:35:56,622 INFO L226 Difference]: Without dead ends: 2677 [2021-05-03 16:35:56,623 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:35:56,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-05-03 16:35:56,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-05-03 16:35:56,652 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) [2021-05-03 16:35:56,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-05-03 16:35:56,674 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-05-03 16:35:56,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:56,674 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-05-03 16:35:56,674 INFO L481 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) [2021-05-03 16:35:56,674 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-05-03 16:35:56,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:35:56,676 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:56,676 INFO L551 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] [2021-05-03 16:35:56,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-03 16:35:56,877 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:56,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:56,877 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-05-03 16:35:56,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:56,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082023306] [2021-05-03 16:35:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:56,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082023306] [2021-05-03 16:35:56,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453057721] [2021-05-03 16:35:56,916 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 [2021-05-03 16:35:56,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:35:56,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:35:56,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:35:56,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:56,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:56,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:35:56,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401845673] [2021-05-03 16:35:56,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:35:56,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:56,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:35:56,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:35:56,998 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) [2021-05-03 16:35:57,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:57,620 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-05-03 16:35:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:35:57,621 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 [2021-05-03 16:35:57,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:57,625 INFO L225 Difference]: With dead ends: 2474 [2021-05-03 16:35:57,625 INFO L226 Difference]: Without dead ends: 2470 [2021-05-03 16:35:57,626 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 353.8ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:35:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-05-03 16:35:57,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-05-03 16:35:57,655 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) [2021-05-03 16:35:57,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-05-03 16:35:57,657 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-05-03 16:35:57,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:57,657 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-05-03 16:35:57,658 INFO L481 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) [2021-05-03 16:35:57,658 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-05-03 16:35:57,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:35:57,660 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:57,660 INFO L551 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] [2021-05-03 16:35:57,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-03 16:35:57,880 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:57,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:57,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-05-03 16:35:57,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:57,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872456531] [2021-05-03 16:35:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:57,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872456531] [2021-05-03 16:35:57,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005820820] [2021-05-03 16:35:57,929 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) [2021-05-03 16:35:57,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:35:57,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:35:57,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:35:57,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:35:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:58,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:58,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:35:58,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488946972] [2021-05-03 16:35:58,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:35:58,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:58,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:35:58,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:35:58,067 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) [2021-05-03 16:35:58,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:35:58,922 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-05-03 16:35:58,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 16:35:58,923 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 [2021-05-03 16:35:58,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:35:58,942 INFO L225 Difference]: With dead ends: 2514 [2021-05-03 16:35:58,942 INFO L226 Difference]: Without dead ends: 2514 [2021-05-03 16:35:58,943 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:35:58,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-05-03 16:35:58,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-05-03 16:35:58,997 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) [2021-05-03 16:35:58,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-05-03 16:35:59,000 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-05-03 16:35:59,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:35:59,001 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-05-03 16:35:59,001 INFO L481 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) [2021-05-03 16:35:59,001 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-05-03 16:35:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:35:59,017 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:35:59,017 INFO L551 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] [2021-05-03 16:35:59,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-03 16:35:59,233 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:35:59,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:35:59,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-05-03 16:35:59,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:35:59,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717900725] [2021-05-03 16:35:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:35:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:59,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717900725] [2021-05-03 16:35:59,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439814123] [2021-05-03 16:35:59,286 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 [2021-05-03 16:35:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:35:59,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:35:59,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:35:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:59,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:59,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:35:59,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469674226] [2021-05-03 16:35:59,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:35:59,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:59,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:35:59,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:35:59,548 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) [2021-05-03 16:36:00,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:00,200 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-05-03 16:36:00,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:36:00,201 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 [2021-05-03 16:36:00,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:00,209 INFO L225 Difference]: With dead ends: 2332 [2021-05-03 16:36:00,209 INFO L226 Difference]: Without dead ends: 2328 [2021-05-03 16:36:00,209 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 404.5ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:36:00,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-05-03 16:36:00,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-05-03 16:36:00,244 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) [2021-05-03 16:36:00,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-05-03 16:36:00,247 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-05-03 16:36:00,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:00,247 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-05-03 16:36:00,247 INFO L481 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) [2021-05-03 16:36:00,248 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-05-03 16:36:00,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:36:00,250 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:00,250 INFO L551 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] [2021-05-03 16:36:00,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-03 16:36:00,471 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:00,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:00,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-05-03 16:36:00,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:00,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696690077] [2021-05-03 16:36:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:36:00,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696690077] [2021-05-03 16:36:00,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734204077] [2021-05-03 16:36:00,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:00,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 16:36:00,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:00,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:36:00,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:36:00,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:00,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 16:36:00,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191863765] [2021-05-03 16:36:00,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:36:00,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:00,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:36:00,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:36:00,570 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) [2021-05-03 16:36:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:00,664 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-05-03 16:36:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:36:00,665 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 [2021-05-03 16:36:00,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:00,667 INFO L225 Difference]: With dead ends: 929 [2021-05-03 16:36:00,667 INFO L226 Difference]: Without dead ends: 929 [2021-05-03 16:36:00,667 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:36:00,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-05-03 16:36:00,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-05-03 16:36:00,680 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) [2021-05-03 16:36:00,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-05-03 16:36:00,682 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-05-03 16:36:00,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:00,683 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-05-03 16:36:00,683 INFO L481 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) [2021-05-03 16:36:00,683 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-05-03 16:36:00,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:36:00,685 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:00,685 INFO L551 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] [2021-05-03 16:36:00,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:00,901 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:00,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:00,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-05-03 16:36:00,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:00,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467207679] [2021-05-03 16:36:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:00,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:00,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467207679] [2021-05-03 16:36:00,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509130570] [2021-05-03 16:36:00,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:00,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:36:00,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:00,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:36:00,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:01,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:01,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 16:36:01,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012074268] [2021-05-03 16:36:01,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:36:01,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:01,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:36:01,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:36:01,019 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) [2021-05-03 16:36:01,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:01,295 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-05-03 16:36:01,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:36:01,295 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 [2021-05-03 16:36:01,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:01,298 INFO L225 Difference]: With dead ends: 1555 [2021-05-03 16:36:01,298 INFO L226 Difference]: Without dead ends: 1555 [2021-05-03 16:36:01,299 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 167.6ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:36:01,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-05-03 16:36:01,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-05-03 16:36:01,315 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) [2021-05-03 16:36:01,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-05-03 16:36:01,318 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-05-03 16:36:01,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:01,318 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-05-03 16:36:01,318 INFO L481 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) [2021-05-03 16:36:01,318 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-05-03 16:36:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:36:01,320 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:01,320 INFO L551 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] [2021-05-03 16:36:01,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:01,541 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:01,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:01,541 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-05-03 16:36:01,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:01,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323464098] [2021-05-03 16:36:01,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:01,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323464098] [2021-05-03 16:36:01,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770375242] [2021-05-03 16:36:01,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:01,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:36:01,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:01,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:36:01,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:01,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:01,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 16:36:01,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775377492] [2021-05-03 16:36:01,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:36:01,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:01,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:36:01,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:36:01,641 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) [2021-05-03 16:36:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:01,890 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-05-03 16:36:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:36:01,891 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 [2021-05-03 16:36:01,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:01,893 INFO L225 Difference]: With dead ends: 1605 [2021-05-03 16:36:01,893 INFO L226 Difference]: Without dead ends: 1605 [2021-05-03 16:36:01,894 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:36:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-05-03 16:36:01,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-05-03 16:36:01,912 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) [2021-05-03 16:36:01,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-05-03 16:36:01,914 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-05-03 16:36:01,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:01,914 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-05-03 16:36:01,914 INFO L481 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) [2021-05-03 16:36:01,914 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-05-03 16:36:01,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:36:01,918 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:01,918 INFO L551 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] [2021-05-03 16:36:02,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:02,133 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:02,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:02,133 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-05-03 16:36:02,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:02,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647661433] [2021-05-03 16:36:02,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:36:02,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647661433] [2021-05-03 16:36:02,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266884823] [2021-05-03 16:36:02,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:02,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:36:02,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:02,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:36:02,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:36:02,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:02,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 16:36:02,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105543841] [2021-05-03 16:36:02,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:36:02,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:02,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:36:02,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:36:02,234 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) [2021-05-03 16:36:02,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:02,420 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-05-03 16:36:02,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 16:36:02,421 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 [2021-05-03 16:36:02,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:02,423 INFO L225 Difference]: With dead ends: 1524 [2021-05-03 16:36:02,423 INFO L226 Difference]: Without dead ends: 1520 [2021-05-03 16:36:02,423 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:36:02,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-05-03 16:36:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-05-03 16:36:02,438 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) [2021-05-03 16:36:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-05-03 16:36:02,440 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-05-03 16:36:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:02,441 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-05-03 16:36:02,441 INFO L481 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) [2021-05-03 16:36:02,441 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-05-03 16:36:02,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:36:02,442 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:02,442 INFO L551 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] [2021-05-03 16:36:02,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-05-03 16:36:02,657 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:02,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:02,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-05-03 16:36:02,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:02,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116157022] [2021-05-03 16:36:02,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:02,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116157022] [2021-05-03 16:36:02,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597902347] [2021-05-03 16:36:02,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:02,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:36:02,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:02,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:36:02,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:02,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:02,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 16:36:02,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622642762] [2021-05-03 16:36:02,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:36:02,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:02,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:36:02,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:36:02,775 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) [2021-05-03 16:36:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:03,025 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-05-03 16:36:03,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:36:03,026 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:36:03,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:03,028 INFO L225 Difference]: With dead ends: 1508 [2021-05-03 16:36:03,028 INFO L226 Difference]: Without dead ends: 1496 [2021-05-03 16:36:03,028 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:36:03,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-05-03 16:36:03,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-05-03 16:36:03,044 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) [2021-05-03 16:36:03,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-05-03 16:36:03,046 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-05-03 16:36:03,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:03,046 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-05-03 16:36:03,047 INFO L481 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) [2021-05-03 16:36:03,047 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-05-03 16:36:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:36:03,048 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:03,048 INFO L551 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] [2021-05-03 16:36:03,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:03,262 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:03,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:03,263 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-05-03 16:36:03,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:03,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591805945] [2021-05-03 16:36:03,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:03,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591805945] [2021-05-03 16:36:03,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750869195] [2021-05-03 16:36:03,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:03,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:36:03,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:03,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:36:03,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:03,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:03,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:36:03,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962864153] [2021-05-03 16:36:03,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:36:03,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:03,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:36:03,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:36:03,402 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) [2021-05-03 16:36:03,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:03,947 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-05-03 16:36:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:36:03,947 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 [2021-05-03 16:36:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:03,951 INFO L225 Difference]: With dead ends: 2412 [2021-05-03 16:36:03,951 INFO L226 Difference]: Without dead ends: 2412 [2021-05-03 16:36:03,952 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 357.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:36:03,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-05-03 16:36:03,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-05-03 16:36:03,975 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) [2021-05-03 16:36:03,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-05-03 16:36:03,977 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-05-03 16:36:03,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:03,978 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-05-03 16:36:03,978 INFO L481 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) [2021-05-03 16:36:03,978 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-05-03 16:36:03,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:36:03,980 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:03,980 INFO L551 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] [2021-05-03 16:36:04,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-03 16:36:04,201 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:04,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:04,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-05-03 16:36:04,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:04,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973108382] [2021-05-03 16:36:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:04,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973108382] [2021-05-03 16:36:04,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802010572] [2021-05-03 16:36:04,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:04,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:36:04,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:04,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:04,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:36:04,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439777944] [2021-05-03 16:36:04,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:36:04,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:04,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:36:04,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:36:04,353 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) [2021-05-03 16:36:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:04,803 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-05-03 16:36:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:36:04,803 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 [2021-05-03 16:36:04,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:04,806 INFO L225 Difference]: With dead ends: 2335 [2021-05-03 16:36:04,806 INFO L226 Difference]: Without dead ends: 2335 [2021-05-03 16:36:04,806 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 308.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:36:04,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-05-03 16:36:04,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-05-03 16:36:04,826 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) [2021-05-03 16:36:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-05-03 16:36:04,828 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-05-03 16:36:04,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:04,828 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-05-03 16:36:04,828 INFO L481 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) [2021-05-03 16:36:04,829 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-05-03 16:36:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:36:04,830 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:04,830 INFO L551 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] [2021-05-03 16:36:05,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:05,045 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:05,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:05,045 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-05-03 16:36:05,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:05,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368011337] [2021-05-03 16:36:05,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:05,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368011337] [2021-05-03 16:36:05,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471120561] [2021-05-03 16:36:05,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:05,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:36:05,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:05,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:36:05,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:05,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:05,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:36:05,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311339762] [2021-05-03 16:36:05,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:36:05,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:05,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:36:05,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:36:05,177 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) [2021-05-03 16:36:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:05,601 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-05-03 16:36:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:36:05,602 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 [2021-05-03 16:36:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:05,605 INFO L225 Difference]: With dead ends: 2285 [2021-05-03 16:36:05,605 INFO L226 Difference]: Without dead ends: 2285 [2021-05-03 16:36:05,606 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 277.4ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 16:36:05,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-05-03 16:36:05,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-05-03 16:36:05,622 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) [2021-05-03 16:36:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-05-03 16:36:05,624 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-05-03 16:36:05,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:05,624 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-05-03 16:36:05,624 INFO L481 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) [2021-05-03 16:36:05,624 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-05-03 16:36:05,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:36:05,626 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:05,626 INFO L551 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] [2021-05-03 16:36:05,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-03 16:36:05,841 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:05,841 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-05-03 16:36:05,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:05,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433406351] [2021-05-03 16:36:05,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:05,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433406351] [2021-05-03 16:36:05,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894940624] [2021-05-03 16:36:05,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:05,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:36:05,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:05,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:36:05,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:05,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:05,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:36:05,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737216737] [2021-05-03 16:36:05,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:36:05,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:05,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:36:05,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:36:05,995 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) [2021-05-03 16:36:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:06,361 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-05-03 16:36:06,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 16:36:06,362 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 [2021-05-03 16:36:06,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:06,365 INFO L225 Difference]: With dead ends: 2176 [2021-05-03 16:36:06,366 INFO L226 Difference]: Without dead ends: 2172 [2021-05-03 16:36:06,366 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:36:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-05-03 16:36:06,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-05-03 16:36:06,383 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) [2021-05-03 16:36:06,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-05-03 16:36:06,385 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-05-03 16:36:06,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:06,386 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-05-03 16:36:06,386 INFO L481 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) [2021-05-03 16:36:06,386 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-05-03 16:36:06,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:36:06,388 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:06,388 INFO L551 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] [2021-05-03 16:36:06,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:06,591 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:06,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:06,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-05-03 16:36:06,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:06,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810690446] [2021-05-03 16:36:06,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:06,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810690446] [2021-05-03 16:36:06,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661941725] [2021-05-03 16:36:06,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:06,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:36:06,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:06,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:36:06,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:06,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:06,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:36:06,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298342869] [2021-05-03 16:36:06,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:36:06,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:06,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:36:06,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:36:06,737 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) [2021-05-03 16:36:07,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:07,128 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-05-03 16:36:07,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 16:36:07,128 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 [2021-05-03 16:36:07,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:07,131 INFO L225 Difference]: With dead ends: 2199 [2021-05-03 16:36:07,131 INFO L226 Difference]: Without dead ends: 2199 [2021-05-03 16:36:07,131 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 263.1ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:36:07,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-05-03 16:36:07,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-05-03 16:36:07,150 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) [2021-05-03 16:36:07,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-05-03 16:36:07,152 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-05-03 16:36:07,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:07,152 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-05-03 16:36:07,152 INFO L481 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) [2021-05-03 16:36:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-05-03 16:36:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:36:07,154 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:07,154 INFO L551 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] [2021-05-03 16:36:07,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-03 16:36:07,357 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:07,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:07,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-05-03 16:36:07,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:07,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585079572] [2021-05-03 16:36:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:07,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585079572] [2021-05-03 16:36:07,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740666661] [2021-05-03 16:36:07,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:07,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:36:07,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:07,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:36:07,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:07,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:07,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:36:07,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541749111] [2021-05-03 16:36:07,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:36:07,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:07,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:36:07,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:36:07,513 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) [2021-05-03 16:36:07,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:07,973 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-05-03 16:36:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:36:07,973 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 [2021-05-03 16:36:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:07,976 INFO L225 Difference]: With dead ends: 2156 [2021-05-03 16:36:07,976 INFO L226 Difference]: Without dead ends: 2152 [2021-05-03 16:36:07,976 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:36:07,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-05-03 16:36:07,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-05-03 16:36:07,997 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) [2021-05-03 16:36:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-05-03 16:36:07,999 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-05-03 16:36:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:07,999 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-05-03 16:36:07,999 INFO L481 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) [2021-05-03 16:36:07,999 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-05-03 16:36:08,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:36:08,001 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:08,001 INFO L551 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] [2021-05-03 16:36:08,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-03 16:36:08,222 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:08,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:08,222 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-05-03 16:36:08,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:08,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339383464] [2021-05-03 16:36:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:08,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339383464] [2021-05-03 16:36:08,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664764603] [2021-05-03 16:36:08,259 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) [2021-05-03 16:36:08,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:36:08,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:08,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:36:08,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:08,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:08,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:36:08,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34871753] [2021-05-03 16:36:08,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:36:08,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:08,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:36:08,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:36:08,372 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) [2021-05-03 16:36:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:08,742 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-05-03 16:36:08,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:36:08,743 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 [2021-05-03 16:36:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:08,745 INFO L225 Difference]: With dead ends: 2097 [2021-05-03 16:36:08,745 INFO L226 Difference]: Without dead ends: 2097 [2021-05-03 16:36:08,745 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 221.4ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:36:08,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-05-03 16:36:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-05-03 16:36:08,761 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) [2021-05-03 16:36:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-05-03 16:36:08,762 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-05-03 16:36:08,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:08,763 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-05-03 16:36:08,763 INFO L481 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) [2021-05-03 16:36:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-05-03 16:36:08,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:36:08,764 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:08,764 INFO L551 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] [2021-05-03 16:36:08,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:08,965 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:08,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:08,965 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-05-03 16:36:08,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:08,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687942262] [2021-05-03 16:36:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:09,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687942262] [2021-05-03 16:36:09,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039585555] [2021-05-03 16:36:09,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:09,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:36:09,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:09,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:09,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:36:09,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063476119] [2021-05-03 16:36:09,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:36:09,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:09,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:36:09,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:36:09,090 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) [2021-05-03 16:36:09,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:09,359 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-05-03 16:36:09,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:36:09,360 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 [2021-05-03 16:36:09,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:09,362 INFO L225 Difference]: With dead ends: 1963 [2021-05-03 16:36:09,362 INFO L226 Difference]: Without dead ends: 1959 [2021-05-03 16:36:09,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 167.6ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:36:09,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-05-03 16:36:09,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-05-03 16:36:09,387 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) [2021-05-03 16:36:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-05-03 16:36:09,389 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-05-03 16:36:09,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:09,389 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-05-03 16:36:09,389 INFO L481 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) [2021-05-03 16:36:09,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-05-03 16:36:09,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:36:09,391 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:09,391 INFO L551 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] [2021-05-03 16:36:09,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-05-03 16:36:09,610 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:09,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:09,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-05-03 16:36:09,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:09,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657734403] [2021-05-03 16:36:09,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:09,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657734403] [2021-05-03 16:36:09,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963365743] [2021-05-03 16:36:09,649 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) [2021-05-03 16:36:09,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:36:09,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:09,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:36:09,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:09,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:09,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:36:09,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834829578] [2021-05-03 16:36:09,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:36:09,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:09,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:36:09,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:36:09,749 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) [2021-05-03 16:36:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:10,023 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-05-03 16:36:10,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:36:10,023 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 [2021-05-03 16:36:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:10,026 INFO L225 Difference]: With dead ends: 1728 [2021-05-03 16:36:10,026 INFO L226 Difference]: Without dead ends: 1716 [2021-05-03 16:36:10,026 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:36:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-05-03 16:36:10,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-05-03 16:36:10,040 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) [2021-05-03 16:36:10,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-05-03 16:36:10,043 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-05-03 16:36:10,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:10,043 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-05-03 16:36:10,043 INFO L481 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) [2021-05-03 16:36:10,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-05-03 16:36:10,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:36:10,045 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:10,046 INFO L551 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] [2021-05-03 16:36:10,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:10,261 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:10,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-05-03 16:36:10,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:10,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784710413] [2021-05-03 16:36:10,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:10,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784710413] [2021-05-03 16:36:10,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679257607] [2021-05-03 16:36:10,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:10,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:36:10,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:10,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:36:10,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:10,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:10,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:36:10,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882985587] [2021-05-03 16:36:10,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:36:10,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:10,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:36:10,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:36:10,400 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) [2021-05-03 16:36:10,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:10,756 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-05-03 16:36:10,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:36:10,756 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 [2021-05-03 16:36:10,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:10,759 INFO L225 Difference]: With dead ends: 1821 [2021-05-03 16:36:10,759 INFO L226 Difference]: Without dead ends: 1821 [2021-05-03 16:36:10,759 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:36:10,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-05-03 16:36:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-05-03 16:36:10,774 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) [2021-05-03 16:36:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-05-03 16:36:10,776 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-05-03 16:36:10,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:10,776 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-05-03 16:36:10,776 INFO L481 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) [2021-05-03 16:36:10,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-05-03 16:36:10,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:36:10,778 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:10,778 INFO L551 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] [2021-05-03 16:36:10,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-05-03 16:36:10,978 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:10,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:10,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-05-03 16:36:10,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:10,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659453081] [2021-05-03 16:36:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:11,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659453081] [2021-05-03 16:36:11,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078099769] [2021-05-03 16:36:11,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:11,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:36:11,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:11,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:36:11,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:11,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:11,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:36:11,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422864683] [2021-05-03 16:36:11,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:36:11,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:11,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:36:11,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:36:11,116 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) [2021-05-03 16:36:11,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:11,364 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-05-03 16:36:11,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:36:11,364 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 [2021-05-03 16:36:11,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:11,367 INFO L225 Difference]: With dead ends: 1790 [2021-05-03 16:36:11,367 INFO L226 Difference]: Without dead ends: 1786 [2021-05-03 16:36:11,367 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:36:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-05-03 16:36:11,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-05-03 16:36:11,383 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) [2021-05-03 16:36:11,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-05-03 16:36:11,386 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-05-03 16:36:11,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:11,386 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-05-03 16:36:11,386 INFO L481 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) [2021-05-03 16:36:11,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-05-03 16:36:11,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:36:11,388 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:11,388 INFO L551 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] [2021-05-03 16:36:11,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-05-03 16:36:11,605 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:11,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:11,605 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-05-03 16:36:11,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:11,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398877629] [2021-05-03 16:36:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:11,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398877629] [2021-05-03 16:36:11,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710848510] [2021-05-03 16:36:11,639 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:11,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:36:11,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:11,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:36:11,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:11,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:11,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:36:11,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627066127] [2021-05-03 16:36:11,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:36:11,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:11,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:36:11,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:36:11,717 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) [2021-05-03 16:36:11,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:11,871 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-05-03 16:36:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:36:11,872 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 [2021-05-03 16:36:11,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:11,875 INFO L225 Difference]: With dead ends: 1649 [2021-05-03 16:36:11,875 INFO L226 Difference]: Without dead ends: 1637 [2021-05-03 16:36:11,875 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:36:11,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-05-03 16:36:11,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-05-03 16:36:11,888 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) [2021-05-03 16:36:11,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-05-03 16:36:11,890 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-05-03 16:36:11,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:11,890 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-05-03 16:36:11,891 INFO L481 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) [2021-05-03 16:36:11,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-05-03 16:36:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:36:11,892 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:11,892 INFO L551 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] [2021-05-03 16:36:12,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:12,093 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:12,093 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-05-03 16:36:12,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:12,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440079029] [2021-05-03 16:36:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:12,368 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-05-03 16:36:12,487 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-05-03 16:36:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:12,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440079029] [2021-05-03 16:36:12,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469655837] [2021-05-03 16:36:12,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:12,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:36:12,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:12,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:36:12,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:13,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:13,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:36:13,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:13,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:13,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:36:13,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:13,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:13,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-05-03 16:36:13,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:13,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:13,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:36:13,309 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:13,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:13,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:36:13,317 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:13,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:13,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:36:13,326 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:13,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:13,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:36:13,336 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:13,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:13,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:36:13,348 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:13,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:13,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:36:13,357 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:13,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:13,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:36:13,365 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:13,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:13,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:36:13,373 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:13,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:13,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:36:13,381 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:13,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:13,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:36:13,390 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:13,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:13,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:36:13,398 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:13,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:13,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:13,403 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 31 treesize of output 19 [2021-05-03 16:36:13,404 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:13,529 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-05-03 16:36:13,530 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-05-03 16:36:13,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:36:13,532 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-05-03 16:36:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:13,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:13,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:36:13,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037227447] [2021-05-03 16:36:13,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:36:13,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:13,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:36:13,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:36:13,600 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) [2021-05-03 16:36:14,219 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-05-03 16:36:14,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:14,510 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-05-03 16:36:14,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:36:14,510 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 [2021-05-03 16:36:14,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:14,512 INFO L225 Difference]: With dead ends: 1517 [2021-05-03 16:36:14,512 INFO L226 Difference]: Without dead ends: 1502 [2021-05-03 16:36:14,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1364.1ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:36:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-05-03 16:36:14,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-05-03 16:36:14,527 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) [2021-05-03 16:36:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-05-03 16:36:14,529 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-05-03 16:36:14,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:14,529 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-05-03 16:36:14,529 INFO L481 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) [2021-05-03 16:36:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-05-03 16:36:14,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:36:14,531 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:14,531 INFO L551 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] [2021-05-03 16:36:14,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-03 16:36:14,732 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:14,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:14,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-05-03 16:36:14,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:14,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758374370] [2021-05-03 16:36:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:15,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758374370] [2021-05-03 16:36:15,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755665270] [2021-05-03 16:36:15,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:15,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:36:15,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:15,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:36:15,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:15,906 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-05-03 16:36:15,973 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3, v_prenex_5], 2=[A, v_prenex_7]} [2021-05-03 16:36:15,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:15,979 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 [2021-05-03 16:36:15,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:16,149 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-05-03 16:36:16,150 INFO L628 ElimStorePlain]: treesize reduction 54, result has 73.1 percent of original size [2021-05-03 16:36:16,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:16,157 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 [2021-05-03 16:36:16,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:16,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:16,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:16,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:16,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:16,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:36:16,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:16,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:16,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:16,228 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 21 treesize of output 13 [2021-05-03 16:36:16,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:16,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:16,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:16,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:16,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:36:16,277 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:16,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:16,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:36:16,319 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:211, output treesize:51 [2021-05-03 16:36:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:16,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:16,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:36:16,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551363614] [2021-05-03 16:36:16,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:36:16,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:16,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:36:16,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:36:16,404 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 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) [2021-05-03 16:36:16,999 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-05-03 16:36:17,242 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-05-03 16:36:17,398 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-05-03 16:36:17,574 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-05-03 16:36:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:18,153 INFO L93 Difference]: Finished difference Result 1547 states and 4937 transitions. [2021-05-03 16:36:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 16:36:18,153 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 [2021-05-03 16:36:18,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:18,156 INFO L225 Difference]: With dead ends: 1547 [2021-05-03 16:36:18,156 INFO L226 Difference]: Without dead ends: 1502 [2021-05-03 16:36:18,156 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2213.1ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 16:36:18,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-05-03 16:36:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1171. [2021-05-03 16:36:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.347008547008547) internal successors, (3916), 1170 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:36:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3916 transitions. [2021-05-03 16:36:18,170 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3916 transitions. Word has length 26 [2021-05-03 16:36:18,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:18,170 INFO L480 AbstractCegarLoop]: Abstraction has 1171 states and 3916 transitions. [2021-05-03 16:36:18,170 INFO L481 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) [2021-05-03 16:36:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3916 transitions. [2021-05-03 16:36:18,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:36:18,172 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:18,173 INFO L551 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] [2021-05-03 16:36:18,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:18,373 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:18,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:18,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-05-03 16:36:18,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:18,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559807316] [2021-05-03 16:36:18,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:18,851 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-05-03 16:36:18,987 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-05-03 16:36:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:19,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559807316] [2021-05-03 16:36:19,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617972807] [2021-05-03 16:36:19,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:19,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:36:19,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:19,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:36:19,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:19,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:36:19,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:19,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,846 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:36:19,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:19,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:36:19,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:19,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:36:19,875 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:19,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:36:19,887 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:19,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:36:19,899 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:19,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,910 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-05-03 16:36:19,911 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:19,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:36:19,924 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:19,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,935 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 37 treesize of output 19 [2021-05-03 16:36:19,936 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:19,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:36:19,949 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:19,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:36:19,960 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:19,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,974 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 41 treesize of output 16 [2021-05-03 16:36:19,975 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:19,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:36:19,987 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:19,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:19,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:19,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:36:19,998 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:20,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:20,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:20,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:20,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:20,003 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 41 treesize of output 13 [2021-05-03 16:36:20,004 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:20,032 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-05-03 16:36:20,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:36:20,033 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-05-03 16:36:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:20,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:20,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 16:36:20,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463752140] [2021-05-03 16:36:20,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:36:20,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:20,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:36:20,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:36:20,069 INFO L87 Difference]: Start difference. First operand 1171 states and 3916 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:36:21,431 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2021-05-03 16:36:21,665 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-05-03 16:36:21,821 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2021-05-03 16:36:21,943 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2021-05-03 16:36:22,279 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 52 [2021-05-03 16:36:22,462 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2021-05-03 16:36:22,715 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-05-03 16:36:22,878 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 55 [2021-05-03 16:36:23,162 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-05-03 16:36:23,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:23,286 INFO L93 Difference]: Finished difference Result 1671 states and 5380 transitions. [2021-05-03 16:36:23,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:36:23,286 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 [2021-05-03 16:36:23,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:23,289 INFO L225 Difference]: With dead ends: 1671 [2021-05-03 16:36:23,289 INFO L226 Difference]: Without dead ends: 1656 [2021-05-03 16:36:23,289 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 3514.0ms TimeCoverageRelationStatistics Valid=375, Invalid=1881, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 16:36:23,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-05-03 16:36:23,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1201. [2021-05-03 16:36:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3316666666666666) internal successors, (3998), 1200 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:36:23,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 3998 transitions. [2021-05-03 16:36:23,304 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 3998 transitions. Word has length 26 [2021-05-03 16:36:23,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:23,304 INFO L480 AbstractCegarLoop]: Abstraction has 1201 states and 3998 transitions. [2021-05-03 16:36:23,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:36:23,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 3998 transitions. [2021-05-03 16:36:23,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:36:23,306 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:23,306 INFO L551 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] [2021-05-03 16:36:23,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-03 16:36:23,507 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:23,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:23,507 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-05-03 16:36:23,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:23,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751700593] [2021-05-03 16:36:23,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:23,757 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-05-03 16:36:23,990 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-05-03 16:36:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:24,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751700593] [2021-05-03 16:36:24,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690701997] [2021-05-03 16:36:24,148 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 [2021-05-03 16:36:24,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:36:24,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:24,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:36:24,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:24,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,492 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:36:24,492 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 40 treesize of output 22 [2021-05-03 16:36:24,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:24,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:24,509 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 43 treesize of output 31 [2021-05-03 16:36:24,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:24,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:24,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-05-03 16:36:24,537 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:24,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,555 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:36:24,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-05-03 16:36:24,558 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:24,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,575 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:36:24,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-05-03 16:36:24,577 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:24,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,591 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:36:24,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-05-03 16:36:24,593 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:24,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,608 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:36:24,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-05-03 16:36:24,609 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:24,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,624 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:36:24,624 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 50 treesize of output 30 [2021-05-03 16:36:24,625 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:24,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,640 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:36:24,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-05-03 16:36:24,641 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:24,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,656 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:36:24,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-05-03 16:36:24,658 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:24,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,673 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:36:24,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-05-03 16:36:24,675 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:24,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:24,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-05-03 16:36:24,697 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:24,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:24,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-05-03 16:36:24,715 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:24,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:24,732 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 45 treesize of output 31 [2021-05-03 16:36:24,735 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:24,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,749 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:36:24,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-05-03 16:36:24,751 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:24,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:24,758 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:36:24,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-05-03 16:36:24,760 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:24,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:24,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:36:24,843 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-05-03 16:36:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:25,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:25,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:36:25,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083914443] [2021-05-03 16:36:25,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:36:25,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:25,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:36:25,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:36:25,073 INFO L87 Difference]: Start difference. First operand 1201 states and 3998 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) [2021-05-03 16:36:25,663 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-05-03 16:36:25,916 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-05-03 16:36:26,052 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-05-03 16:36:26,230 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2021-05-03 16:36:26,367 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2021-05-03 16:36:26,780 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2021-05-03 16:36:26,994 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2021-05-03 16:36:27,304 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2021-05-03 16:36:27,466 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-05-03 16:36:28,057 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-05-03 16:36:28,339 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 42 [2021-05-03 16:36:28,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:28,445 INFO L93 Difference]: Finished difference Result 1873 states and 5950 transitions. [2021-05-03 16:36:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 16:36:28,445 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 [2021-05-03 16:36:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:28,448 INFO L225 Difference]: With dead ends: 1873 [2021-05-03 16:36:28,448 INFO L226 Difference]: Without dead ends: 1858 [2021-05-03 16:36:28,448 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3558.2ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:36:28,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-05-03 16:36:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1210. [2021-05-03 16:36:28,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 3.339950372208437) internal successors, (4038), 1209 states have internal predecessors, (4038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:36:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 4038 transitions. [2021-05-03 16:36:28,466 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 4038 transitions. Word has length 26 [2021-05-03 16:36:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:28,466 INFO L480 AbstractCegarLoop]: Abstraction has 1210 states and 4038 transitions. [2021-05-03 16:36:28,466 INFO L481 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) [2021-05-03 16:36:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 4038 transitions. [2021-05-03 16:36:28,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:36:28,467 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:28,468 INFO L551 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] [2021-05-03 16:36:28,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:28,668 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:28,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:28,669 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-05-03 16:36:28,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:28,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844530521] [2021-05-03 16:36:28,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:28,907 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-05-03 16:36:29,024 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-05-03 16:36:29,180 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-05-03 16:36:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:29,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844530521] [2021-05-03 16:36:29,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801784716] [2021-05-03 16:36:29,393 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 [2021-05-03 16:36:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:29,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:36:29,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:30,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:36:30,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:30,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:36:30,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:30,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,082 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 37 treesize of output 19 [2021-05-03 16:36:30,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:30,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,094 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 28 treesize of output 13 [2021-05-03 16:36:30,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:30,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,106 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 13 [2021-05-03 16:36:30,107 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:30,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:36:30,119 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:30,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-05-03 16:36:30,132 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:30,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:36:30,144 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:30,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:36:30,156 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:30,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:36:30,167 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:30,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:36:30,187 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:30,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:36:30,197 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:30,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:36:30,209 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:30,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:36:30,219 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:30,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:30,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:30,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:36:30,230 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:30,264 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-05-03 16:36:30,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:36:30,266 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-05-03 16:36:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:30,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:30,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 16:36:30,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35467628] [2021-05-03 16:36:30,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:36:30,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:30,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:36:30,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:36:30,308 INFO L87 Difference]: Start difference. First operand 1210 states and 4038 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:36:30,760 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 46 [2021-05-03 16:36:30,888 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2021-05-03 16:36:31,743 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-05-03 16:36:31,877 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2021-05-03 16:36:32,017 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49 [2021-05-03 16:36:32,178 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2021-05-03 16:36:32,328 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 56 [2021-05-03 16:36:32,739 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 53 [2021-05-03 16:36:32,934 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 58 [2021-05-03 16:36:33,311 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-05-03 16:36:33,514 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2021-05-03 16:36:33,680 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-05-03 16:36:33,833 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-05-03 16:36:34,161 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-05-03 16:36:34,391 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-05-03 16:36:34,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:34,556 INFO L93 Difference]: Finished difference Result 1907 states and 6071 transitions. [2021-05-03 16:36:34,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 16:36:34,556 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 [2021-05-03 16:36:34,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:34,559 INFO L225 Difference]: With dead ends: 1907 [2021-05-03 16:36:34,559 INFO L226 Difference]: Without dead ends: 1892 [2021-05-03 16:36:34,560 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 4307.2ms TimeCoverageRelationStatistics Valid=479, Invalid=2277, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 16:36:34,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-05-03 16:36:34,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1221. [2021-05-03 16:36:34,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 3.3459016393442624) internal successors, (4082), 1220 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:36:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 4082 transitions. [2021-05-03 16:36:34,583 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 4082 transitions. Word has length 26 [2021-05-03 16:36:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:34,583 INFO L480 AbstractCegarLoop]: Abstraction has 1221 states and 4082 transitions. [2021-05-03 16:36:34,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:36:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 4082 transitions. [2021-05-03 16:36:34,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:36:34,585 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:34,585 INFO L551 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] [2021-05-03 16:36:34,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-05-03 16:36:34,786 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:34,786 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-05-03 16:36:34,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:34,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514185908] [2021-05-03 16:36:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:34,990 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-05-03 16:36:35,115 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-05-03 16:36:35,277 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-05-03 16:36:35,424 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-05-03 16:36:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:35,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514185908] [2021-05-03 16:36:35,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975965789] [2021-05-03 16:36:35,662 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 [2021-05-03 16:36:35,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:36:35,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:35,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:36:35,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:36,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,454 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 16:36:36,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:36:36,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:36,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,487 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-05-03 16:36:36,487 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 37 treesize of output 29 [2021-05-03 16:36:36,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:36,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,525 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 16:36:36,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-05-03 16:36:36,532 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:36,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,569 INFO L354 Elim1Store]: treesize reduction 9, result has 66.7 percent of original size [2021-05-03 16:36:36,570 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 33 treesize of output 36 [2021-05-03 16:36:36,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:36,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,595 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:36:36,595 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 28 treesize of output 1 [2021-05-03 16:36:36,596 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:36,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,614 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:36:36,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:36:36,614 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:36,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,636 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-05-03 16:36:36,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 22 [2021-05-03 16:36:36,638 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:36,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,656 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:36:36,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:36:36,656 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:36,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,682 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-05-03 16:36:36,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:36:36,686 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:36,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,714 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-03 16:36:36,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:36:36,718 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:36,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,736 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:36:36,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-05-03 16:36:36,737 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:36,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,763 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-05-03 16:36:36,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-05-03 16:36:36,764 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:36,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:36,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:36:36,813 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:36,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,836 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:36:36,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:36:36,837 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:36,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,858 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:36:36,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-05-03 16:36:36,859 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:36,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:36,872 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:36:36,872 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 39 treesize of output 1 [2021-05-03 16:36:36,873 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:37,019 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-05-03 16:36:37,019 INFO L628 ElimStorePlain]: treesize reduction 123, result has 52.0 percent of original size [2021-05-03 16:36:37,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:36:37,024 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:148 [2021-05-03 16:36:37,157 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-05-03 16:36:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:37,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:37,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-05-03 16:36:37,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358428596] [2021-05-03 16:36:37,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 16:36:37,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:37,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 16:36:37,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:36:37,223 INFO L87 Difference]: Start difference. First operand 1221 states and 4082 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) [2021-05-03 16:36:38,267 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2021-05-03 16:36:39,103 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-05-03 16:36:39,278 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-05-03 16:36:39,671 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2021-05-03 16:36:40,433 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2021-05-03 16:36:40,942 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2021-05-03 16:36:41,094 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-05-03 16:36:41,279 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-05-03 16:36:41,698 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-05-03 16:36:42,080 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-05-03 16:36:42,259 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 41 [2021-05-03 16:36:42,584 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-05-03 16:36:42,837 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2021-05-03 16:36:43,020 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 42 [2021-05-03 16:36:43,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:43,187 INFO L93 Difference]: Finished difference Result 2629 states and 8153 transitions. [2021-05-03 16:36:43,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 16:36:43,188 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 [2021-05-03 16:36:43,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:43,191 INFO L225 Difference]: With dead ends: 2629 [2021-05-03 16:36:43,191 INFO L226 Difference]: Without dead ends: 2584 [2021-05-03 16:36:43,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 6276.6ms TimeCoverageRelationStatistics Valid=599, Invalid=3691, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 16:36:43,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-05-03 16:36:43,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1396. [2021-05-03 16:36:43,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 3.3161290322580643) internal successors, (4626), 1395 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:36:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 4626 transitions. [2021-05-03 16:36:43,211 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 4626 transitions. Word has length 26 [2021-05-03 16:36:43,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:43,212 INFO L480 AbstractCegarLoop]: Abstraction has 1396 states and 4626 transitions. [2021-05-03 16:36:43,212 INFO L481 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) [2021-05-03 16:36:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 4626 transitions. [2021-05-03 16:36:43,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:36:43,213 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:43,214 INFO L551 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] [2021-05-03 16:36:43,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-05-03 16:36:43,414 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:43,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:43,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-05-03 16:36:43,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:43,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344773487] [2021-05-03 16:36:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:43,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344773487] [2021-05-03 16:36:43,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489225090] [2021-05-03 16:36:43,913 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 [2021-05-03 16:36:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:43,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:36:43,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:44,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:44,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:36:44,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:44,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:44,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:36:44,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:44,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:44,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,455 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 28 treesize of output 16 [2021-05-03 16:36:44,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:44,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:44,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:36:44,465 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:44,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:44,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:36:44,474 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:44,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:44,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:36:44,482 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:44,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:44,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:36:44,490 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:44,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:44,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:36:44,498 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:44,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:44,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,503 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:36:44,504 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:44,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:44,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:36:44,511 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:44,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:44,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,516 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:36:44,517 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:44,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:44,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,522 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 36 treesize of output 19 [2021-05-03 16:36:44,523 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:44,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:44,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:36:44,529 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:44,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:44,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:36:44,536 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:44,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:44,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:44,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:36:44,540 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:44,620 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-05-03 16:36:44,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:36:44,622 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-05-03 16:36:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:44,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:44,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:36:44,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463720272] [2021-05-03 16:36:44,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:36:44,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:44,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:36:44,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:36:44,679 INFO L87 Difference]: Start difference. First operand 1396 states and 4626 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) [2021-05-03 16:36:45,292 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-05-03 16:36:45,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:45,836 INFO L93 Difference]: Finished difference Result 1801 states and 5846 transitions. [2021-05-03 16:36:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:36:45,837 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 [2021-05-03 16:36:45,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:45,840 INFO L225 Difference]: With dead ends: 1801 [2021-05-03 16:36:45,840 INFO L226 Difference]: Without dead ends: 1786 [2021-05-03 16:36:45,840 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1485.2ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:36:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-05-03 16:36:45,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1407. [2021-05-03 16:36:45,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 3.313655761024182) internal successors, (4659), 1406 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:36:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 4659 transitions. [2021-05-03 16:36:45,859 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 4659 transitions. Word has length 26 [2021-05-03 16:36:45,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:45,859 INFO L480 AbstractCegarLoop]: Abstraction has 1407 states and 4659 transitions. [2021-05-03 16:36:45,859 INFO L481 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) [2021-05-03 16:36:45,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 4659 transitions. [2021-05-03 16:36:45,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:36:45,861 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:45,861 INFO L551 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] [2021-05-03 16:36:46,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:46,062 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:46,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:46,062 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-05-03 16:36:46,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:46,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777111357] [2021-05-03 16:36:46,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:46,289 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 16:36:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:46,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777111357] [2021-05-03 16:36:46,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124627316] [2021-05-03 16:36:46,629 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 [2021-05-03 16:36:46,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:36:46,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:46,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 16:36:46,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:47,077 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:36:47,185 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:36:47,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:36:47,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:47,332 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-05-03 16:36:47,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:47,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:47,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:36:47,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:47,503 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-03 16:36:47,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:47,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:47,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:36:47,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:47,678 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-05-03 16:36:47,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:47,701 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:36:47,702 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:36:47,703 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:47,854 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-05-03 16:36:47,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:47,885 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:36:47,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-05-03 16:36:47,890 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:48,030 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-05-03 16:36:48,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:48,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:48,049 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 33 treesize of output 35 [2021-05-03 16:36:48,052 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:48,193 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-05-03 16:36:48,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:48,214 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:36:48,214 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 [2021-05-03 16:36:48,216 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:48,353 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-05-03 16:36:48,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:48,378 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:36:48,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:36:48,383 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:48,517 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-03 16:36:48,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:48,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:36:48,535 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:365, output treesize:376 [2021-05-03 16:36:48,876 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-05-03 16:36:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:49,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:49,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-05-03 16:36:49,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421271651] [2021-05-03 16:36:49,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:36:49,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:49,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:36:49,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:36:49,018 INFO L87 Difference]: Start difference. First operand 1407 states and 4659 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) [2021-05-03 16:36:49,658 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-05-03 16:36:50,003 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-05-03 16:36:50,139 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-05-03 16:36:50,358 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-05-03 16:36:50,500 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-05-03 16:36:50,757 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 16:36:51,244 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-05-03 16:36:51,490 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-05-03 16:36:51,903 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-05-03 16:36:52,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:52,024 INFO L93 Difference]: Finished difference Result 1848 states and 5971 transitions. [2021-05-03 16:36:52,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 16:36:52,025 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 [2021-05-03 16:36:52,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:52,027 INFO L225 Difference]: With dead ends: 1848 [2021-05-03 16:36:52,027 INFO L226 Difference]: Without dead ends: 1833 [2021-05-03 16:36:52,028 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 3641.5ms TimeCoverageRelationStatistics Valid=220, Invalid=1112, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:36:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2021-05-03 16:36:52,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1415. [2021-05-03 16:36:52,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1414 states have (on average 3.3125884016973126) internal successors, (4684), 1414 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:36:52,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 4684 transitions. [2021-05-03 16:36:52,046 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 4684 transitions. Word has length 26 [2021-05-03 16:36:52,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:52,046 INFO L480 AbstractCegarLoop]: Abstraction has 1415 states and 4684 transitions. [2021-05-03 16:36:52,046 INFO L481 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) [2021-05-03 16:36:52,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 4684 transitions. [2021-05-03 16:36:52,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:36:52,049 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:52,049 INFO L551 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] [2021-05-03 16:36:52,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable450 [2021-05-03 16:36:52,249 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:52,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:52,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-05-03 16:36:52,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:52,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146984865] [2021-05-03 16:36:52,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:52,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146984865] [2021-05-03 16:36:52,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683988200] [2021-05-03 16:36:52,709 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 [2021-05-03 16:36:52,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:36:52,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:52,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:36:52,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:53,220 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-05-03 16:36:53,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:53,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:53,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:53,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:36:53,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:53,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:53,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:53,529 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 16 treesize of output 7 [2021-05-03 16:36:53,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:53,735 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-05-03 16:36:53,736 INFO L628 ElimStorePlain]: treesize reduction 98, result has 62.0 percent of original size [2021-05-03 16:36:53,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:53,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:53,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:36:53,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:53,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:53,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:53,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-05-03 16:36:53,825 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:53,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:53,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:53,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:36:53,833 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:53,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:53,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:53,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:53,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:36:53,901 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:53,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:36:53,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:36:53,960 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:309, output treesize:51 [2021-05-03 16:36:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:54,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:54,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:36:54,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688803090] [2021-05-03 16:36:54,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:36:54,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:54,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:36:54,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:36:54,025 INFO L87 Difference]: Start difference. First operand 1415 states and 4684 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) [2021-05-03 16:36:54,839 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 49 [2021-05-03 16:36:55,106 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2021-05-03 16:36:55,341 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-05-03 16:36:55,691 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2021-05-03 16:36:56,057 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-05-03 16:36:56,284 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-05-03 16:36:56,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:56,379 INFO L93 Difference]: Finished difference Result 1769 states and 5693 transitions. [2021-05-03 16:36:56,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:36:56,380 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 [2021-05-03 16:36:56,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:56,383 INFO L225 Difference]: With dead ends: 1769 [2021-05-03 16:36:56,383 INFO L226 Difference]: Without dead ends: 1754 [2021-05-03 16:36:56,383 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 2782.4ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:36:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2021-05-03 16:36:56,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1433. [2021-05-03 16:36:56,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 3.3170391061452515) internal successors, (4750), 1432 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:36:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 4750 transitions. [2021-05-03 16:36:56,405 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 4750 transitions. Word has length 26 [2021-05-03 16:36:56,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:56,405 INFO L480 AbstractCegarLoop]: Abstraction has 1433 states and 4750 transitions. [2021-05-03 16:36:56,405 INFO L481 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) [2021-05-03 16:36:56,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 4750 transitions. [2021-05-03 16:36:56,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:36:56,408 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:56,408 INFO L551 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] [2021-05-03 16:36:56,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-05-03 16:36:56,609 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:56,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:56,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-05-03 16:36:56,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:56,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18868775] [2021-05-03 16:36:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:56,803 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-05-03 16:36:56,928 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-05-03 16:36:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:57,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18868775] [2021-05-03 16:36:57,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753841507] [2021-05-03 16:36:57,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:57,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:36:57,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:57,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:36:57,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:57,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:57,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:36:57,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:57,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:57,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:36:57,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:57,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:57,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:36:57,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:57,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:57,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-05-03 16:36:57,665 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:57,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:57,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:36:57,671 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:57,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:57,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:36:57,678 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:57,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:57,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:36:57,688 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:57,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:57,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:36:57,696 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:57,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:57,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:36:57,705 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:57,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:57,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:36:57,711 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:57,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:57,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:36:57,717 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:57,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:57,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:36:57,724 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:57,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:57,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:36:57,731 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:57,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:57,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,737 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:36:57,738 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:57,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:57,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:36:57,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:36:57,742 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:57,821 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-05-03 16:36:57,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:36:57,822 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-05-03 16:36:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:57,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:36:57,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 16:36:57,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4892608] [2021-05-03 16:36:57,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:36:57,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:36:57,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:36:57,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:36:57,886 INFO L87 Difference]: Start difference. First operand 1433 states and 4750 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) [2021-05-03 16:36:58,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:36:58,703 INFO L93 Difference]: Finished difference Result 1743 states and 5703 transitions. [2021-05-03 16:36:58,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:36:58,703 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 [2021-05-03 16:36:58,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:36:58,706 INFO L225 Difference]: With dead ends: 1743 [2021-05-03 16:36:58,706 INFO L226 Difference]: Without dead ends: 1728 [2021-05-03 16:36:58,706 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1248.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:36:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2021-05-03 16:36:58,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1442. [2021-05-03 16:36:58,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3213046495489245) internal successors, (4786), 1441 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:36:58,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4786 transitions. [2021-05-03 16:36:58,723 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4786 transitions. Word has length 26 [2021-05-03 16:36:58,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:36:58,723 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 4786 transitions. [2021-05-03 16:36:58,723 INFO L481 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) [2021-05-03 16:36:58,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4786 transitions. [2021-05-03 16:36:58,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:36:58,725 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:36:58,725 INFO L551 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] [2021-05-03 16:36:58,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-05-03 16:36:58,926 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:36:58,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:36:58,926 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-05-03 16:36:58,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:36:58,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294466620] [2021-05-03 16:36:58,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:36:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:36:59,244 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-05-03 16:36:59,365 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-03 16:36:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:36:59,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294466620] [2021-05-03 16:36:59,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005549443] [2021-05-03 16:36:59,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:36:59,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:36:59,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:36:59,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:36:59,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:36:59,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:59,958 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:36:59,958 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 28 treesize of output 16 [2021-05-03 16:36:59,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:59,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:59,970 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:36:59,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:36:59,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:59,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:59,981 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:36:59,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-05-03 16:36:59,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:36:59,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:36:59,997 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:36:59,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:36:59,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:00,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:00,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:00,017 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 28 treesize of output 24 [2021-05-03 16:37:00,023 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:00,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:00,038 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:37:00,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:37:00,040 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:00,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:00,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:00,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:37:00,059 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:00,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:00,071 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:00,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:00,072 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:00,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:00,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:00,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:37:00,088 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:00,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:00,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:00,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:37:00,113 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:00,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:00,125 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:00,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:37:00,126 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:00,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:00,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:00,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:00,141 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:00,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:00,153 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:37:00,154 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 [2021-05-03 16:37:00,155 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:00,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:00,164 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:00,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:00,165 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:00,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:00,173 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:00,174 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 [2021-05-03 16:37:00,174 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:00,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:00,181 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:00,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:37:00,181 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:00,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:00,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:37:00,288 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-05-03 16:37:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:00,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:37:00,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:37:00,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468282317] [2021-05-03 16:37:00,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:37:00,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:37:00,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:37:00,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:37:00,496 INFO L87 Difference]: Start difference. First operand 1442 states and 4786 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) [2021-05-03 16:37:00,977 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 38 [2021-05-03 16:37:01,223 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-05-03 16:37:01,364 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-05-03 16:37:01,796 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2021-05-03 16:37:01,965 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-05-03 16:37:02,221 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2021-05-03 16:37:02,424 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-05-03 16:37:02,617 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-05-03 16:37:03,298 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-05-03 16:37:03,440 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-05-03 16:37:03,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:37:03,613 INFO L93 Difference]: Finished difference Result 2256 states and 7236 transitions. [2021-05-03 16:37:03,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 16:37:03,614 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 [2021-05-03 16:37:03,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:37:03,617 INFO L225 Difference]: With dead ends: 2256 [2021-05-03 16:37:03,617 INFO L226 Difference]: Without dead ends: 2226 [2021-05-03 16:37:03,617 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 3242.0ms TimeCoverageRelationStatistics Valid=322, Invalid=1570, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:37:03,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-05-03 16:37:03,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1442. [2021-05-03 16:37:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3213046495489245) internal successors, (4786), 1441 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:37:03,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4786 transitions. [2021-05-03 16:37:03,637 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4786 transitions. Word has length 26 [2021-05-03 16:37:03,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:37:03,637 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 4786 transitions. [2021-05-03 16:37:03,637 INFO L481 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) [2021-05-03 16:37:03,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4786 transitions. [2021-05-03 16:37:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:37:03,640 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:37:03,640 INFO L551 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] [2021-05-03 16:37:03,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-05-03 16:37:03,847 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:37:03,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:37:03,847 INFO L82 PathProgramCache]: Analyzing trace with hash -249530138, now seen corresponding path program 12 times [2021-05-03 16:37:03,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:37:03,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130000699] [2021-05-03 16:37:03,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:37:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:37:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:04,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130000699] [2021-05-03 16:37:04,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908001224] [2021-05-03 16:37:04,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:37:04,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:37:04,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:37:04,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:37:04,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:37:04,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:04,661 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:04,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:37:04,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:04,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:04,676 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:04,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:04,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:04,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:04,690 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:04,690 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 33 treesize of output 19 [2021-05-03 16:37:04,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:04,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:04,707 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:37:04,707 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 21 treesize of output 17 [2021-05-03 16:37:04,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:04,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:04,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:04,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:37:04,728 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:04,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:04,746 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:37:04,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:37:04,749 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:04,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:04,762 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:04,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:37:04,763 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:04,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:04,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:04,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:37:04,783 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:04,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:04,796 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:04,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:37:04,797 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:04,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:04,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:04,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:37:04,819 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:04,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:04,832 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:04,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-05-03 16:37:04,833 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:04,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:04,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:04,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:37:04,848 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:04,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:04,860 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:37:04,861 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 28 treesize of output 20 [2021-05-03 16:37:04,862 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:04,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:04,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:04,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:37:04,877 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:04,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:04,886 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:04,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:37:04,887 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:04,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:04,893 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:04,893 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 31 treesize of output 19 [2021-05-03 16:37:04,894 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:04,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:04,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:37:04,975 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-05-03 16:37:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:05,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:37:05,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:37:05,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758754823] [2021-05-03 16:37:05,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:37:05,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:37:05,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:37:05,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:37:05,186 INFO L87 Difference]: Start difference. First operand 1442 states and 4786 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) [2021-05-03 16:37:05,646 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-05-03 16:37:05,910 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-05-03 16:37:06,057 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-05-03 16:37:06,437 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-05-03 16:37:06,589 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-05-03 16:37:06,968 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-05-03 16:37:07,199 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-05-03 16:37:07,366 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-05-03 16:37:08,036 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-05-03 16:37:08,301 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2021-05-03 16:37:08,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:37:08,366 INFO L93 Difference]: Finished difference Result 2069 states and 6722 transitions. [2021-05-03 16:37:08,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:37:08,367 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 [2021-05-03 16:37:08,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:37:08,369 INFO L225 Difference]: With dead ends: 2069 [2021-05-03 16:37:08,370 INFO L226 Difference]: Without dead ends: 2054 [2021-05-03 16:37:08,370 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 3320.9ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 16:37:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-05-03 16:37:08,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1442. [2021-05-03 16:37:08,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3213046495489245) internal successors, (4786), 1441 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:37:08,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4786 transitions. [2021-05-03 16:37:08,389 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4786 transitions. Word has length 26 [2021-05-03 16:37:08,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:37:08,389 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 4786 transitions. [2021-05-03 16:37:08,389 INFO L481 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) [2021-05-03 16:37:08,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4786 transitions. [2021-05-03 16:37:08,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:37:08,391 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:37:08,391 INFO L551 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] [2021-05-03 16:37:08,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:37:08,592 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:37:08,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:37:08,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-05-03 16:37:08,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:37:08,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12869416] [2021-05-03 16:37:08,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:37:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:37:08,910 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-05-03 16:37:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:09,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12869416] [2021-05-03 16:37:09,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297265503] [2021-05-03 16:37:09,217 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 [2021-05-03 16:37:09,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:37:09,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:37:09,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:37:09,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:37:09,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:37:09,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:09,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-05-03 16:37:09,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:09,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:37:09,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:09,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,897 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 37 treesize of output 19 [2021-05-03 16:37:09,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:09,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:37:09,908 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:09,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:37:09,918 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:09,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,927 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 34 treesize of output 16 [2021-05-03 16:37:09,928 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:09,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:37:09,938 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:09,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-05-03 16:37:09,948 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:09,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:37:09,958 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:09,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:37:09,967 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:09,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:37:09,979 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:09,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:37:09,989 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:09,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:09,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:09,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-05-03 16:37:09,998 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:10,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:10,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:10,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:10,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:10,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:37:10,006 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:10,036 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-05-03 16:37:10,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:37:10,037 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-05-03 16:37:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:10,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:37:10,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-05-03 16:37:10,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661318753] [2021-05-03 16:37:10,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:37:10,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:37:10,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:37:10,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:37:10,075 INFO L87 Difference]: Start difference. First operand 1442 states and 4786 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:37:10,573 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-05-03 16:37:10,945 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-05-03 16:37:11,127 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-05-03 16:37:11,355 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-05-03 16:37:11,803 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-05-03 16:37:12,020 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-05-03 16:37:12,162 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-05-03 16:37:12,607 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2021-05-03 16:37:13,328 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 51 [2021-05-03 16:37:13,468 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-05-03 16:37:13,765 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-05-03 16:37:14,086 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 52 [2021-05-03 16:37:14,295 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2021-05-03 16:37:15,005 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-05-03 16:37:15,172 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-05-03 16:37:15,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:37:15,508 INFO L93 Difference]: Finished difference Result 2538 states and 7861 transitions. [2021-05-03 16:37:15,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 16:37:15,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:37:15,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:37:15,511 INFO L225 Difference]: With dead ends: 2538 [2021-05-03 16:37:15,511 INFO L226 Difference]: Without dead ends: 2493 [2021-05-03 16:37:15,512 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 5142.4ms TimeCoverageRelationStatistics Valid=698, Invalid=3592, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 16:37:15,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-05-03 16:37:15,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 1453. [2021-05-03 16:37:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.331267217630854) internal successors, (4837), 1452 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) [2021-05-03 16:37:15,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 4837 transitions. [2021-05-03 16:37:15,533 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 4837 transitions. Word has length 26 [2021-05-03 16:37:15,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:37:15,533 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 4837 transitions. [2021-05-03 16:37:15,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:37:15,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 4837 transitions. [2021-05-03 16:37:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:37:15,535 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:37:15,535 INFO L551 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] [2021-05-03 16:37:15,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2021-05-03 16:37:15,737 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:37:15,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:37:15,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-05-03 16:37:15,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:37:15,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542842793] [2021-05-03 16:37:15,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:37:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:37:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:16,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542842793] [2021-05-03 16:37:16,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153262275] [2021-05-03 16:37:16,286 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 [2021-05-03 16:37:16,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:37:16,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:37:16,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:37:16,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:37:16,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:16,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:16,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:16,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:16,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:16,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:37:16,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:16,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:16,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:16,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:16,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:16,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:16,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-05-03 16:37:16,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:16,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:16,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:16,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:16,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:16,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:16,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:37:16,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:16,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:16,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:16,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:16,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:16,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:16,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-05-03 16:37:16,998 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:17,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:17,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:37:17,008 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:17,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:17,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,016 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 35 treesize of output 19 [2021-05-03 16:37:17,017 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:17,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:17,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:37:17,026 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:17,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:17,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:37:17,036 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:17,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:17,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:37:17,046 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:17,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:17,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,054 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:37:17,055 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:17,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:17,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:37:17,064 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:17,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:17,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:37:17,072 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:17,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:17,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:37:17,081 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:17,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:17,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:37:17,088 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:17,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:17,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:17,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-05-03 16:37:17,093 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:17,123 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-05-03 16:37:17,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:37:17,124 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-05-03 16:37:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:17,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:37:17,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-05-03 16:37:17,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736074943] [2021-05-03 16:37:17,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:37:17,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:37:17,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:37:17,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:37:17,151 INFO L87 Difference]: Start difference. First operand 1453 states and 4837 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:37:17,653 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-05-03 16:37:18,061 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-05-03 16:37:18,282 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-05-03 16:37:18,635 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-05-03 16:37:18,880 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-05-03 16:37:19,237 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-05-03 16:37:19,728 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2021-05-03 16:37:20,628 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-05-03 16:37:20,789 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-05-03 16:37:21,047 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-05-03 16:37:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:37:21,272 INFO L93 Difference]: Finished difference Result 2460 states and 7663 transitions. [2021-05-03 16:37:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:37:21,272 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:37:21,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:37:21,276 INFO L225 Difference]: With dead ends: 2460 [2021-05-03 16:37:21,276 INFO L226 Difference]: Without dead ends: 2415 [2021-05-03 16:37:21,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 3988.6ms TimeCoverageRelationStatistics Valid=580, Invalid=2612, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 16:37:21,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-05-03 16:37:21,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1453. [2021-05-03 16:37:21,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.331955922865014) internal successors, (4838), 1452 states have internal predecessors, (4838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:37:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 4838 transitions. [2021-05-03 16:37:21,302 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 4838 transitions. Word has length 26 [2021-05-03 16:37:21,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:37:21,302 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 4838 transitions. [2021-05-03 16:37:21,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:37:21,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 4838 transitions. [2021-05-03 16:37:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:37:21,305 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:37:21,305 INFO L551 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] [2021-05-03 16:37:21,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-05-03 16:37:21,506 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:37:21,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:37:21,506 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-05-03 16:37:21,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:37:21,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764496677] [2021-05-03 16:37:21,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:37:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:37:21,878 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-05-03 16:37:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:22,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764496677] [2021-05-03 16:37:22,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505040631] [2021-05-03 16:37:22,164 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 [2021-05-03 16:37:22,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:37:22,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:37:22,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:37:22,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:37:22,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:22,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:22,848 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 16:37:22,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:37:22,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:22,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:22,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:22,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:22,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:37:22,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:22,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:22,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:22,953 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-05-03 16:37:22,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:37:22,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:22,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:22,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,006 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-05-03 16:37:23,006 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 35 treesize of output 28 [2021-05-03 16:37:23,008 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:23,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,035 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:37:23,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:37:23,036 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:23,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,062 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:37:23,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-05-03 16:37:23,063 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:23,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,104 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-05-03 16:37:23,104 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 34 treesize of output 28 [2021-05-03 16:37:23,107 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:23,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,139 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:37:23,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:37:23,141 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:23,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,171 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:37:23,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:37:23,172 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:23,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,202 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:37:23,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:37:23,203 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:23,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,232 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:37:23,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-05-03 16:37:23,233 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:23,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,263 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-05-03 16:37:23,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:37:23,265 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:23,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,285 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:37:23,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:37:23,286 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:23,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,306 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:37:23,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:37:23,307 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:23,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,327 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:37:23,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-05-03 16:37:23,328 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:23,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:23,340 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:37:23,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:37:23,342 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:23,537 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-03 16:37:23,538 INFO L628 ElimStorePlain]: treesize reduction 39, result has 73.5 percent of original size [2021-05-03 16:37:23,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:37:23,539 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:90 [2021-05-03 16:37:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:23,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:37:23,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-05-03 16:37:23,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933270214] [2021-05-03 16:37:23,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:37:23,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:37:23,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:37:23,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:37:23,651 INFO L87 Difference]: Start difference. First operand 1453 states and 4838 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:37:24,083 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-05-03 16:37:24,267 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-05-03 16:37:24,405 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-05-03 16:37:24,964 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2021-05-03 16:37:25,207 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-05-03 16:37:25,767 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-05-03 16:37:26,042 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-05-03 16:37:26,178 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-05-03 16:37:26,513 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2021-05-03 16:37:27,002 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 53 [2021-05-03 16:37:27,334 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 58 [2021-05-03 16:37:27,942 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2021-05-03 16:37:28,226 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2021-05-03 16:37:28,426 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2021-05-03 16:37:28,788 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-05-03 16:37:29,046 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 40 [2021-05-03 16:37:29,514 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-05-03 16:37:29,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:37:29,820 INFO L93 Difference]: Finished difference Result 3397 states and 10519 transitions. [2021-05-03 16:37:29,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 16:37:29,821 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 [2021-05-03 16:37:29,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:37:29,825 INFO L225 Difference]: With dead ends: 3397 [2021-05-03 16:37:29,825 INFO L226 Difference]: Without dead ends: 3337 [2021-05-03 16:37:29,826 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 5953.3ms TimeCoverageRelationStatistics Valid=834, Invalid=3456, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 16:37:29,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2021-05-03 16:37:29,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 1474. [2021-05-03 16:37:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.351663272233537) internal successors, (4937), 1473 states have internal predecessors, (4937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:37:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4937 transitions. [2021-05-03 16:37:29,860 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4937 transitions. Word has length 26 [2021-05-03 16:37:29,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:37:29,860 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 4937 transitions. [2021-05-03 16:37:29,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:37:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4937 transitions. [2021-05-03 16:37:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:37:29,862 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:37:29,862 INFO L551 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] [2021-05-03 16:37:30,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable768 [2021-05-03 16:37:30,063 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:37:30,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:37:30,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-05-03 16:37:30,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:37:30,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596207603] [2021-05-03 16:37:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:37:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:37:30,280 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-05-03 16:37:30,414 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-05-03 16:37:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:30,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596207603] [2021-05-03 16:37:30,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122994845] [2021-05-03 16:37:30,726 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 [2021-05-03 16:37:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:37:30,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:37:30,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:37:31,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:31,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,194 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 26 treesize of output 13 [2021-05-03 16:37:31,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:31,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:31,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,201 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 28 treesize of output 16 [2021-05-03 16:37:31,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:31,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:31,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:37:31,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:31,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:31,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:31,216 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:31,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:31,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:37:31,223 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:31,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:31,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:37:31,231 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:31,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:31,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:31,250 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:31,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:31,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:37:31,258 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:31,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:31,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:31,265 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:31,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:31,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:37:31,272 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:31,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:31,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:37:31,279 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:31,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:31,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:31,299 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:31,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:31,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:37:31,306 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:31,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:31,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:31,312 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:31,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:31,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:31,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-05-03 16:37:31,321 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:31,407 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-05-03 16:37:31,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:37:31,408 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-05-03 16:37:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:31,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:37:31,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:37:31,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642497044] [2021-05-03 16:37:31,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:37:31,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:37:31,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:37:31,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:37:31,468 INFO L87 Difference]: Start difference. First operand 1474 states and 4937 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) [2021-05-03 16:37:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:37:32,413 INFO L93 Difference]: Finished difference Result 1857 states and 6096 transitions. [2021-05-03 16:37:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:37:32,414 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 [2021-05-03 16:37:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:37:32,416 INFO L225 Difference]: With dead ends: 1857 [2021-05-03 16:37:32,416 INFO L226 Difference]: Without dead ends: 1842 [2021-05-03 16:37:32,417 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1425.7ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:37:32,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-05-03 16:37:32,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1474. [2021-05-03 16:37:32,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.351663272233537) internal successors, (4937), 1473 states have internal predecessors, (4937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:37:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4937 transitions. [2021-05-03 16:37:32,435 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4937 transitions. Word has length 26 [2021-05-03 16:37:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:37:32,435 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 4937 transitions. [2021-05-03 16:37:32,435 INFO L481 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) [2021-05-03 16:37:32,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4937 transitions. [2021-05-03 16:37:32,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:37:32,437 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:37:32,437 INFO L551 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] [2021-05-03 16:37:32,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:37:32,637 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:37:32,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:37:32,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 14 times [2021-05-03 16:37:32,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:37:32,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004594396] [2021-05-03 16:37:32,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:37:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:37:32,834 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-05-03 16:37:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:33,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004594396] [2021-05-03 16:37:33,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173926897] [2021-05-03 16:37:33,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:37:33,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:37:33,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:37:33,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 16:37:33,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:37:33,891 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-05-03 16:37:33,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 39 [2021-05-03 16:37:33,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:33,927 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-05-03 16:37:33,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-05-03 16:37:33,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:34,154 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-03 16:37:34,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:34,187 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-05-03 16:37:34,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-05-03 16:37:34,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:34,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:34,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 34 [2021-05-03 16:37:34,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:34,397 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 16:37:34,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:34,428 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-05-03 16:37:34,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-05-03 16:37:34,430 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:34,459 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-05-03 16:37:34,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-05-03 16:37:34,464 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:34,637 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-03 16:37:34,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:34,670 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-05-03 16:37:34,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2021-05-03 16:37:34,677 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:34,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:34,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-05-03 16:37:34,702 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:35,034 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-05-03 16:37:35,034 INFO L628 ElimStorePlain]: treesize reduction 17, result has 94.5 percent of original size [2021-05-03 16:37:35,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:37:35,083 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:820 [2021-05-03 16:37:35,616 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-05-03 16:37:35,949 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-05-03 16:37:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:36,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:37:36,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 16:37:36,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144264105] [2021-05-03 16:37:36,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:37:36,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:37:36,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:37:36,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:37:36,088 INFO L87 Difference]: Start difference. First operand 1474 states and 4937 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) [2021-05-03 16:37:36,286 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 22 [2021-05-03 16:37:36,448 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 28 [2021-05-03 16:37:36,926 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 50 [2021-05-03 16:37:37,557 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 41 [2021-05-03 16:37:37,836 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-05-03 16:37:38,087 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 16:37:38,581 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 50 [2021-05-03 16:37:39,028 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 62 [2021-05-03 16:37:39,505 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 69 [2021-05-03 16:37:39,946 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 49 [2021-05-03 16:37:40,281 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2021-05-03 16:37:40,918 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-05-03 16:37:41,400 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-05-03 16:37:42,028 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 60 [2021-05-03 16:37:42,905 WARN L205 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2021-05-03 16:37:43,306 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 44 [2021-05-03 16:37:43,943 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 70 [2021-05-03 16:37:44,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:37:44,044 INFO L93 Difference]: Finished difference Result 2117 states and 6795 transitions. [2021-05-03 16:37:44,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:37:44,045 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 [2021-05-03 16:37:44,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:37:44,048 INFO L225 Difference]: With dead ends: 2117 [2021-05-03 16:37:44,048 INFO L226 Difference]: Without dead ends: 2102 [2021-05-03 16:37:44,048 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 8471.7ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 16:37:44,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-05-03 16:37:44,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1478. [2021-05-03 16:37:44,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 3.3568043331076507) internal successors, (4958), 1477 states have internal predecessors, (4958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:37:44,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 4958 transitions. [2021-05-03 16:37:44,075 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 4958 transitions. Word has length 26 [2021-05-03 16:37:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:37:44,075 INFO L480 AbstractCegarLoop]: Abstraction has 1478 states and 4958 transitions. [2021-05-03 16:37:44,075 INFO L481 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) [2021-05-03 16:37:44,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 4958 transitions. [2021-05-03 16:37:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:37:44,077 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:37:44,077 INFO L551 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] [2021-05-03 16:37:44,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable897,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:37:44,298 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:37:44,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:37:44,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1741432748, now seen corresponding path program 15 times [2021-05-03 16:37:44,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:37:44,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620917766] [2021-05-03 16:37:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:37:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:37:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:44,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620917766] [2021-05-03 16:37:44,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684689061] [2021-05-03 16:37:44,796 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 [2021-05-03 16:37:44,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:37:44,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:37:44,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 16:37:44,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:37:45,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:45,201 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:45,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:37:45,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:45,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:45,215 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:37:45,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:37:45,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:45,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:45,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:45,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:37:45,235 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:45,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:45,245 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:45,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-05-03 16:37:45,246 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:45,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:45,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:45,259 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 26 treesize of output 24 [2021-05-03 16:37:45,261 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:45,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:45,271 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:45,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:37:45,272 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:45,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:45,282 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:45,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:45,283 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:45,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:45,297 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:37:45,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:37:45,298 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:45,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:45,308 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:45,308 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 26 treesize of output 16 [2021-05-03 16:37:45,309 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:45,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:45,323 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:37:45,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:37:45,325 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:45,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:45,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:45,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:45,340 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:45,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:45,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:45,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:45,361 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:45,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:45,372 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:45,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:45,373 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:45,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:45,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:45,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:45,388 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:45,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:45,398 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:45,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:45,399 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:45,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:45,407 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:37:45,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:45,408 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:45,517 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:37:45,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:45,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:37:45,521 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-05-03 16:37:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:45,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:37:45,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-03 16:37:45,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397119874] [2021-05-03 16:37:45,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:37:45,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:37:45,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:37:45,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:37:45,758 INFO L87 Difference]: Start difference. First operand 1478 states and 4958 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) [2021-05-03 16:37:46,591 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-05-03 16:37:46,798 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-05-03 16:37:46,959 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-05-03 16:37:47,154 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-05-03 16:37:47,418 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-05-03 16:37:47,639 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:37:48,072 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-05-03 16:37:48,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:37:48,167 INFO L93 Difference]: Finished difference Result 2018 states and 6612 transitions. [2021-05-03 16:37:48,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 16:37:48,167 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 [2021-05-03 16:37:48,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:37:48,171 INFO L225 Difference]: With dead ends: 2018 [2021-05-03 16:37:48,171 INFO L226 Difference]: Without dead ends: 2003 [2021-05-03 16:37:48,171 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2668.6ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:37:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-05-03 16:37:48,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1475. [2021-05-03 16:37:48,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1474 states have (on average 3.3534599728629577) internal successors, (4943), 1474 states have internal predecessors, (4943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:37:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 4943 transitions. [2021-05-03 16:37:48,214 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 4943 transitions. Word has length 26 [2021-05-03 16:37:48,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:37:48,214 INFO L480 AbstractCegarLoop]: Abstraction has 1475 states and 4943 transitions. [2021-05-03 16:37:48,214 INFO L481 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) [2021-05-03 16:37:48,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 4943 transitions. [2021-05-03 16:37:48,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:37:48,217 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:37:48,217 INFO L551 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] [2021-05-03 16:37:48,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable977,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:37:48,438 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:37:48,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:37:48,438 INFO L82 PathProgramCache]: Analyzing trace with hash 9265186, now seen corresponding path program 16 times [2021-05-03 16:37:48,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:37:48,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361006668] [2021-05-03 16:37:48,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:37:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:37:48,811 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-05-03 16:37:49,022 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-05-03 16:37:49,192 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-05-03 16:37:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:49,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361006668] [2021-05-03 16:37:49,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749572533] [2021-05-03 16:37:49,491 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 [2021-05-03 16:37:49,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:37:49,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:37:49,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 16:37:49,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:37:50,035 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:37:50,336 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-05-03 16:37:50,434 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_46, v_prenex_45]} [2021-05-03 16:37:50,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:50,440 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 [2021-05-03 16:37:50,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:50,609 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-05-03 16:37:50,610 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-05-03 16:37:50,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:50,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:50,615 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:37:50,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:50,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:50,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:50,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:50,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:50,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:37:50,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:50,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:50,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:37:50,735 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 21 treesize of output 13 [2021-05-03 16:37:50,737 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:50,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:50,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:37:50,796 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-05-03 16:37:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:50,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:37:50,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:37:50,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707057840] [2021-05-03 16:37:50,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:37:50,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:37:50,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:37:50,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:37:50,901 INFO L87 Difference]: Start difference. First operand 1475 states and 4943 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) [2021-05-03 16:37:51,316 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-05-03 16:37:51,848 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-05-03 16:37:52,264 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-05-03 16:37:52,609 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:37:53,222 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-05-03 16:37:53,753 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-05-03 16:37:53,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:37:53,999 INFO L93 Difference]: Finished difference Result 2004 states and 6582 transitions. [2021-05-03 16:37:54,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 16:37:54,000 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 [2021-05-03 16:37:54,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:37:54,004 INFO L225 Difference]: With dead ends: 2004 [2021-05-03 16:37:54,004 INFO L226 Difference]: Without dead ends: 1989 [2021-05-03 16:37:54,004 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 3977.9ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:37:54,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2021-05-03 16:37:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 1478. [2021-05-03 16:37:54,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 3.3547731888964116) internal successors, (4955), 1477 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:37:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 4955 transitions. [2021-05-03 16:37:54,030 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 4955 transitions. Word has length 26 [2021-05-03 16:37:54,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:37:54,030 INFO L480 AbstractCegarLoop]: Abstraction has 1478 states and 4955 transitions. [2021-05-03 16:37:54,030 INFO L481 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) [2021-05-03 16:37:54,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 4955 transitions. [2021-05-03 16:37:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:37:54,033 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:37:54,033 INFO L551 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] [2021-05-03 16:37:54,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1018,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:37:54,253 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:37:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:37:54,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1608267594, now seen corresponding path program 17 times [2021-05-03 16:37:54,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:37:54,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993042914] [2021-05-03 16:37:54,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:37:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:37:54,794 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-05-03 16:37:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:54,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993042914] [2021-05-03 16:37:54,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908722258] [2021-05-03 16:37:54,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:37:54,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:37:54,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:37:54,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 16:37:54,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:37:55,616 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:37:55,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:55,750 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:37:55,750 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 28 treesize of output 20 [2021-05-03 16:37:55,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:56,053 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-05-03 16:37:56,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:56,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:56,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:56,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:56,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:56,278 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-05-03 16:37:56,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:56,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:56,297 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:37:56,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:37:56,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:56,467 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-03 16:37:56,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:56,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:56,486 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:37:56,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:37:56,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:56,654 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-05-03 16:37:56,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:56,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:56,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:56,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:37:56,682 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:56,855 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-03 16:37:56,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:56,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:56,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:56,877 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 24 [2021-05-03 16:37:56,886 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:57,057 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-05-03 16:37:57,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:57,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:57,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:57,074 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 33 treesize of output 27 [2021-05-03 16:37:57,078 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:57,221 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-05-03 16:37:57,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:57,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:37:57,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:57,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:37:57,239 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:37:57,381 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-03 16:37:57,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:37:57,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:37:57,389 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:309, output treesize:174 [2021-05-03 16:37:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:37:57,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:37:57,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:37:57,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486353534] [2021-05-03 16:37:57,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:37:57,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:37:57,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:37:57,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:37:57,637 INFO L87 Difference]: Start difference. First operand 1478 states and 4955 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) [2021-05-03 16:37:57,879 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 27 [2021-05-03 16:37:58,141 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 38 [2021-05-03 16:37:58,287 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 40 [2021-05-03 16:37:58,709 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-05-03 16:37:58,981 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2021-05-03 16:37:59,254 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 47 [2021-05-03 16:37:59,515 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-05-03 16:37:59,718 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-03 16:38:00,164 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-05-03 16:38:00,870 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2021-05-03 16:38:01,232 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-05-03 16:38:01,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:01,376 INFO L93 Difference]: Finished difference Result 2074 states and 6746 transitions. [2021-05-03 16:38:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:38:01,377 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 [2021-05-03 16:38:01,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:01,380 INFO L225 Difference]: With dead ends: 2074 [2021-05-03 16:38:01,380 INFO L226 Difference]: Without dead ends: 2044 [2021-05-03 16:38:01,380 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 4372.2ms TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:38:01,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-05-03 16:38:01,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1472. [2021-05-03 16:38:01,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.352141400407886) internal successors, (4931), 1471 states have internal predecessors, (4931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 4931 transitions. [2021-05-03 16:38:01,400 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 4931 transitions. Word has length 26 [2021-05-03 16:38:01,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:01,400 INFO L480 AbstractCegarLoop]: Abstraction has 1472 states and 4931 transitions. [2021-05-03 16:38:01,400 INFO L481 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) [2021-05-03 16:38:01,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 4931 transitions. [2021-05-03 16:38:01,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:38:01,402 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:01,402 INFO L551 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] [2021-05-03 16:38:01,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1027 [2021-05-03 16:38:01,603 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:01,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:01,603 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 18 times [2021-05-03 16:38:01,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:01,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094849406] [2021-05-03 16:38:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:02,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094849406] [2021-05-03 16:38:02,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439057045] [2021-05-03 16:38:02,110 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 [2021-05-03 16:38:02,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:38:02,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:02,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:38:02,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:02,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:02,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:38:02,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:02,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:02,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:02,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:02,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:02,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:02,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:02,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:02,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:02,702 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:02,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:02,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:02,712 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:02,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:02,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:38:02,722 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:02,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:02,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:02,731 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:02,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:02,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-05-03 16:38:02,741 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:02,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:02,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:02,750 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:02,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:02,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:38:02,759 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:02,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:02,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:38:02,770 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:02,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:02,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:38:02,781 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:02,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:02,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:02,791 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:02,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:02,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:38:02,801 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:02,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:02,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:02,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:38:02,807 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:02,902 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-05-03 16:38:02,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:38:02,904 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-05-03 16:38:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:02,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:02,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:38:02,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41660908] [2021-05-03 16:38:02,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:38:02,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:02,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:38:02,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:38:02,973 INFO L87 Difference]: Start difference. First operand 1472 states and 4931 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) [2021-05-03 16:38:03,544 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2021-05-03 16:38:04,221 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-05-03 16:38:04,393 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-05-03 16:38:04,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:04,700 INFO L93 Difference]: Finished difference Result 1963 states and 6392 transitions. [2021-05-03 16:38:04,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:38:04,701 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 [2021-05-03 16:38:04,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:04,704 INFO L225 Difference]: With dead ends: 1963 [2021-05-03 16:38:04,704 INFO L226 Difference]: Without dead ends: 1938 [2021-05-03 16:38:04,704 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2055.7ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:38:04,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-05-03 16:38:04,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1507. [2021-05-03 16:38:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 3.347941567065073) internal successors, (5042), 1506 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:04,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 5042 transitions. [2021-05-03 16:38:04,729 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 5042 transitions. Word has length 26 [2021-05-03 16:38:04,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:04,729 INFO L480 AbstractCegarLoop]: Abstraction has 1507 states and 5042 transitions. [2021-05-03 16:38:04,729 INFO L481 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) [2021-05-03 16:38:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 5042 transitions. [2021-05-03 16:38:04,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:38:04,732 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:04,732 INFO L551 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] [2021-05-03 16:38:04,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:04,953 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:04,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:04,953 INFO L82 PathProgramCache]: Analyzing trace with hash -31506310, now seen corresponding path program 19 times [2021-05-03 16:38:04,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:04,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515988555] [2021-05-03 16:38:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:05,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515988555] [2021-05-03 16:38:05,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833811410] [2021-05-03 16:38:05,383 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 [2021-05-03 16:38:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:05,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:38:05,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:05,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:05,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:05,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:38:05,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:05,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:05,802 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:05,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:05,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:05,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:05,813 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:05,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:38:05,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:05,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:05,828 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:05,828 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 28 treesize of output 20 [2021-05-03 16:38:05,830 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:05,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:05,844 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:05,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:05,848 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:05,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:05,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:05,862 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 24 [2021-05-03 16:38:05,867 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:05,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:05,881 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:05,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:05,883 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:05,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:05,895 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:05,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:05,896 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:05,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:05,907 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:05,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:38:05,908 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:05,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:05,931 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:05,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:38:05,932 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:05,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:05,943 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:05,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:38:05,944 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:05,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:05,954 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:05,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:05,955 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:05,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:05,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:05,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:38:05,971 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:05,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:05,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:05,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-05-03 16:38:05,988 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:05,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:05,999 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:05,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-05-03 16:38:06,000 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:06,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:06,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:06,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-05-03 16:38:06,011 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:06,114 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:38:06,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:06,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:38:06,119 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:174 [2021-05-03 16:38:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:06,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:06,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:38:06,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835669487] [2021-05-03 16:38:06,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:38:06,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:06,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:38:06,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:38:06,348 INFO L87 Difference]: Start difference. First operand 1507 states and 5042 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) [2021-05-03 16:38:06,545 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 28 [2021-05-03 16:38:07,593 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-05-03 16:38:08,052 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-05-03 16:38:08,178 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-05-03 16:38:08,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:08,262 INFO L93 Difference]: Finished difference Result 2180 states and 7083 transitions. [2021-05-03 16:38:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:38:08,262 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 [2021-05-03 16:38:08,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:08,266 INFO L225 Difference]: With dead ends: 2180 [2021-05-03 16:38:08,266 INFO L226 Difference]: Without dead ends: 2155 [2021-05-03 16:38:08,266 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2050.7ms TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:38:08,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-05-03 16:38:08,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1510. [2021-05-03 16:38:08,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.34857521537442) internal successors, (5053), 1509 states have internal predecessors, (5053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:08,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5053 transitions. [2021-05-03 16:38:08,285 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5053 transitions. Word has length 26 [2021-05-03 16:38:08,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:08,285 INFO L480 AbstractCegarLoop]: Abstraction has 1510 states and 5053 transitions. [2021-05-03 16:38:08,285 INFO L481 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) [2021-05-03 16:38:08,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5053 transitions. [2021-05-03 16:38:08,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:38:08,287 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:08,287 INFO L551 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] [2021-05-03 16:38:08,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-05-03 16:38:08,488 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:08,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 20 times [2021-05-03 16:38:08,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:08,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143126359] [2021-05-03 16:38:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:08,725 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-05-03 16:38:08,846 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-05-03 16:38:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:09,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143126359] [2021-05-03 16:38:09,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12984521] [2021-05-03 16:38:09,114 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 [2021-05-03 16:38:09,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:38:09,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:09,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 16:38:09,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:09,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:09,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:09,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:09,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:09,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:09,596 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:09,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:38:09,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:09,759 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 16:38:09,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:09,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:09,777 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:09,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:38:09,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:09,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:09,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:09,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:09,795 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:09,938 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 16:38:09,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:09,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:09,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:09,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:09,958 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:09,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:09,970 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:09,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:38:09,972 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:10,102 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:38:10,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:10,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:10,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:10,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:10,119 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:10,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:10,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:10,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-05-03 16:38:10,135 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:10,263 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 16:38:10,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:10,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:38:10,269 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:309, output treesize:174 [2021-05-03 16:38:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:10,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:10,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-03 16:38:10,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134715585] [2021-05-03 16:38:10,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:38:10,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:10,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:38:10,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:38:10,523 INFO L87 Difference]: Start difference. First operand 1510 states and 5053 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) [2021-05-03 16:38:11,472 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-05-03 16:38:11,811 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-05-03 16:38:11,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:11,892 INFO L93 Difference]: Finished difference Result 1689 states and 5564 transitions. [2021-05-03 16:38:11,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:38:11,893 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 [2021-05-03 16:38:11,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:11,895 INFO L225 Difference]: With dead ends: 1689 [2021-05-03 16:38:11,895 INFO L226 Difference]: Without dead ends: 1664 [2021-05-03 16:38:11,895 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1900.9ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:38:11,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-05-03 16:38:11,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1523. [2021-05-03 16:38:11,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 3.354796320630749) internal successors, (5106), 1522 states have internal predecessors, (5106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:11,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 5106 transitions. [2021-05-03 16:38:11,913 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 5106 transitions. Word has length 26 [2021-05-03 16:38:11,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:11,913 INFO L480 AbstractCegarLoop]: Abstraction has 1523 states and 5106 transitions. [2021-05-03 16:38:11,913 INFO L481 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) [2021-05-03 16:38:11,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 5106 transitions. [2021-05-03 16:38:11,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:38:11,916 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:11,916 INFO L551 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] [2021-05-03 16:38:12,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1109,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:12,117 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:12,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:12,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 21 times [2021-05-03 16:38:12,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:12,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074221019] [2021-05-03 16:38:12,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:12,340 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 16:38:12,487 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-05-03 16:38:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:12,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074221019] [2021-05-03 16:38:12,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868750115] [2021-05-03 16:38:12,708 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 [2021-05-03 16:38:12,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:38:12,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:12,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:38:12,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:13,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:13,065 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:13,066 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 28 treesize of output 16 [2021-05-03 16:38:13,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:13,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:13,077 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:13,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:38:13,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:13,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:13,088 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:13,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:13,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:13,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:13,108 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:13,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:13,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:13,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:13,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:13,135 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 33 treesize of output 27 [2021-05-03 16:38:13,137 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:13,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:13,151 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:13,151 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 21 treesize of output 17 [2021-05-03 16:38:13,153 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:13,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:13,164 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:13,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:13,165 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:13,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:13,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:13,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:38:13,180 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:13,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:13,191 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:13,191 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 26 treesize of output 16 [2021-05-03 16:38:13,192 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:13,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:13,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:13,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:38:13,210 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:13,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:13,221 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:13,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-05-03 16:38:13,222 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:13,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:13,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:13,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:13,240 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:13,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:13,254 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:13,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:38:13,256 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:13,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:13,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:13,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:38:13,274 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:13,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:13,284 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:13,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:13,285 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:13,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:13,293 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:13,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:13,294 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:13,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:13,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:38:13,388 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-05-03 16:38:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:13,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:13,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:38:13,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729951112] [2021-05-03 16:38:13,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:38:13,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:13,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:38:13,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:38:13,644 INFO L87 Difference]: Start difference. First operand 1523 states and 5106 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) [2021-05-03 16:38:14,387 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-05-03 16:38:14,573 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-05-03 16:38:15,059 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-05-03 16:38:15,277 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-05-03 16:38:15,564 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-03 16:38:15,877 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-05-03 16:38:15,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:15,977 INFO L93 Difference]: Finished difference Result 2055 states and 6753 transitions. [2021-05-03 16:38:15,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 16:38:15,977 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 [2021-05-03 16:38:15,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:15,980 INFO L225 Difference]: With dead ends: 2055 [2021-05-03 16:38:15,980 INFO L226 Difference]: Without dead ends: 2036 [2021-05-03 16:38:15,980 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2713.2ms TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 16:38:15,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-05-03 16:38:15,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1535. [2021-05-03 16:38:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3578878748370276) internal successors, (5151), 1534 states have internal predecessors, (5151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:16,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5151 transitions. [2021-05-03 16:38:16,000 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5151 transitions. Word has length 26 [2021-05-03 16:38:16,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:16,001 INFO L480 AbstractCegarLoop]: Abstraction has 1535 states and 5151 transitions. [2021-05-03 16:38:16,001 INFO L481 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) [2021-05-03 16:38:16,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5151 transitions. [2021-05-03 16:38:16,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:38:16,003 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:16,003 INFO L551 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] [2021-05-03 16:38:16,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1140,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:16,204 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:16,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 22 times [2021-05-03 16:38:16,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:16,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488095696] [2021-05-03 16:38:16,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:16,626 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-05-03 16:38:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:16,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488095696] [2021-05-03 16:38:16,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271070268] [2021-05-03 16:38:16,735 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 [2021-05-03 16:38:16,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:38:16,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:16,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 16:38:16,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:17,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:17,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:17,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:38:17,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:17,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:17,257 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:17,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:17,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:17,430 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-03 16:38:17,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:17,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:17,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:17,449 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 16 treesize of output 18 [2021-05-03 16:38:17,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:17,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:17,468 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:17,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:38:17,471 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:17,628 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-03 16:38:17,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:17,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:17,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:17,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:38:17,648 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:17,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:17,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:17,661 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 33 treesize of output 27 [2021-05-03 16:38:17,662 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:17,808 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-03 16:38:17,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:17,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:17,824 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:17,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:17,826 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:17,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:17,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:17,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:17,843 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:17,986 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-03 16:38:17,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:17,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:38:17,993 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:325, output treesize:174 [2021-05-03 16:38:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:18,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:18,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:38:18,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087909351] [2021-05-03 16:38:18,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:38:18,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:18,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:38:18,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:38:18,240 INFO L87 Difference]: Start difference. First operand 1535 states and 5151 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) [2021-05-03 16:38:18,432 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 28 [2021-05-03 16:38:18,865 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-05-03 16:38:19,067 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-05-03 16:38:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:19,658 INFO L93 Difference]: Finished difference Result 2036 states and 6692 transitions. [2021-05-03 16:38:19,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 16:38:19,658 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 [2021-05-03 16:38:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:19,661 INFO L225 Difference]: With dead ends: 2036 [2021-05-03 16:38:19,661 INFO L226 Difference]: Without dead ends: 2011 [2021-05-03 16:38:19,661 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1868.9ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:38:19,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-05-03 16:38:19,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1541. [2021-05-03 16:38:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 3.3564935064935066) internal successors, (5169), 1540 states have internal predecessors, (5169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:19,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 5169 transitions. [2021-05-03 16:38:19,680 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 5169 transitions. Word has length 26 [2021-05-03 16:38:19,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:19,680 INFO L480 AbstractCegarLoop]: Abstraction has 1541 states and 5169 transitions. [2021-05-03 16:38:19,680 INFO L481 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) [2021-05-03 16:38:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 5169 transitions. [2021-05-03 16:38:19,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:38:19,682 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:19,682 INFO L551 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] [2021-05-03 16:38:19,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1157,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:19,882 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:19,883 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-05-03 16:38:19,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:19,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113188605] [2021-05-03 16:38:19,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:20,095 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-05-03 16:38:20,233 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-05-03 16:38:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:20,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113188605] [2021-05-03 16:38:20,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139787261] [2021-05-03 16:38:20,567 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:20,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:38:20,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:20,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:38:20,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:21,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:21,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:38:21,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:21,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:38:21,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:21,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:38:21,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:21,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:38:21,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:21,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:38:21,260 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:21,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,270 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 41 treesize of output 13 [2021-05-03 16:38:21,271 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:21,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:38:21,281 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:21,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-05-03 16:38:21,293 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:21,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,302 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 32 treesize of output 16 [2021-05-03 16:38:21,303 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:21,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:38:21,313 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:21,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:38:21,323 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:21,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-05-03 16:38:21,335 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:21,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:38:21,344 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:21,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:38:21,354 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:21,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:21,358 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 39 treesize of output 16 [2021-05-03 16:38:21,359 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,394 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-05-03 16:38:21,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:38:21,396 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-05-03 16:38:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:21,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:21,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 16:38:21,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223556096] [2021-05-03 16:38:21,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:38:21,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:21,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:38:21,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:38:21,435 INFO L87 Difference]: Start difference. First operand 1541 states and 5169 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:22,844 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-05-03 16:38:22,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:22,931 INFO L93 Difference]: Finished difference Result 1988 states and 6491 transitions. [2021-05-03 16:38:22,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:38:22,932 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 [2021-05-03 16:38:22,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:22,935 INFO L225 Difference]: With dead ends: 1988 [2021-05-03 16:38:22,935 INFO L226 Difference]: Without dead ends: 1962 [2021-05-03 16:38:22,936 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2029.2ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:38:22,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-05-03 16:38:22,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1545. [2021-05-03 16:38:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3542746113989637) internal successors, (5179), 1544 states have internal predecessors, (5179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:22,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5179 transitions. [2021-05-03 16:38:22,956 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5179 transitions. Word has length 26 [2021-05-03 16:38:22,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:22,956 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 5179 transitions. [2021-05-03 16:38:22,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:22,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5179 transitions. [2021-05-03 16:38:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:38:22,958 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:22,958 INFO L551 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] [2021-05-03 16:38:23,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1189 [2021-05-03 16:38:23,159 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:23,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:23,159 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-05-03 16:38:23,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:23,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412793697] [2021-05-03 16:38:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:23,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412793697] [2021-05-03 16:38:23,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398844202] [2021-05-03 16:38:23,729 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:23,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:38:23,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:24,166 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-05-03 16:38:24,252 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_75, v_prenex_77], 6=[A, v_prenex_73]} [2021-05-03 16:38:24,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:24,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:24,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:24,266 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 27 treesize of output 13 [2021-05-03 16:38:24,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:24,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:24,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:24,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:38:24,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:24,495 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-05-03 16:38:24,495 INFO L628 ElimStorePlain]: treesize reduction 168, result has 46.7 percent of original size [2021-05-03 16:38:24,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:24,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:24,503 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 16:38:24,505 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:24,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:24,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:24,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:24,576 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 29 treesize of output 13 [2021-05-03 16:38:24,577 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:24,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:24,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:24,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:24,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:24,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:24,628 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:24,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:24,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:38:24,668 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:381, output treesize:55 [2021-05-03 16:38:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:24,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:24,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 16:38:24,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491321790] [2021-05-03 16:38:24,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:38:24,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:24,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:38:24,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:38:24,741 INFO L87 Difference]: Start difference. First operand 1545 states and 5179 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:26,127 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-05-03 16:38:26,264 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2021-05-03 16:38:27,186 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-05-03 16:38:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:27,402 INFO L93 Difference]: Finished difference Result 2157 states and 7044 transitions. [2021-05-03 16:38:27,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 16:38:27,403 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 [2021-05-03 16:38:27,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:27,406 INFO L225 Difference]: With dead ends: 2157 [2021-05-03 16:38:27,406 INFO L226 Difference]: Without dead ends: 2142 [2021-05-03 16:38:27,406 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 2884.5ms TimeCoverageRelationStatistics Valid=362, Invalid=1530, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:38:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-05-03 16:38:27,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 1545. [2021-05-03 16:38:27,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3542746113989637) internal successors, (5179), 1544 states have internal predecessors, (5179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5179 transitions. [2021-05-03 16:38:27,426 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5179 transitions. Word has length 26 [2021-05-03 16:38:27,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:27,426 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 5179 transitions. [2021-05-03 16:38:27,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:27,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5179 transitions. [2021-05-03 16:38:27,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:38:27,428 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:27,428 INFO L551 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] [2021-05-03 16:38:27,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1279 [2021-05-03 16:38:27,628 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:27,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:27,629 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 23 times [2021-05-03 16:38:27,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:27,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055815589] [2021-05-03 16:38:27,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:27,863 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-05-03 16:38:27,986 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 16:38:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:28,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055815589] [2021-05-03 16:38:28,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329624598] [2021-05-03 16:38:28,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:28,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:38:28,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:28,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:38:28,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:28,813 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-03 16:38:29,087 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-05-03 16:38:29,410 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2021-05-03 16:38:29,458 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_87, v_prenex_88], 2=[A, v_prenex_86]} [2021-05-03 16:38:29,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:29,464 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 [2021-05-03 16:38:29,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:29,640 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-05-03 16:38:29,641 INFO L628 ElimStorePlain]: treesize reduction 54, result has 73.1 percent of original size [2021-05-03 16:38:29,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:29,646 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 [2021-05-03 16:38:29,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:29,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:29,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:29,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:29,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:29,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:38:29,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:29,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:29,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:29,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:38:29,732 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:29,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:29,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:29,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:29,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:38:29,802 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:29,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:29,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:38:29,857 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:211, output treesize:51 [2021-05-03 16:38:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:29,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:29,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:38:29,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41012179] [2021-05-03 16:38:29,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:38:29,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:29,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:38:29,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:38:29,936 INFO L87 Difference]: Start difference. First operand 1545 states and 5179 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) [2021-05-03 16:38:30,679 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-05-03 16:38:30,869 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-05-03 16:38:31,198 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-05-03 16:38:31,958 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 81 [2021-05-03 16:38:32,634 WARN L205 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2021-05-03 16:38:33,314 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 76 [2021-05-03 16:38:33,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:33,551 INFO L93 Difference]: Finished difference Result 2023 states and 6590 transitions. [2021-05-03 16:38:33,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 16:38:33,551 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 [2021-05-03 16:38:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:33,555 INFO L225 Difference]: With dead ends: 2023 [2021-05-03 16:38:33,555 INFO L226 Difference]: Without dead ends: 2008 [2021-05-03 16:38:33,555 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 4322.6ms TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:38:33,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-05-03 16:38:33,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1556. [2021-05-03 16:38:33,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1555 states have (on average 3.354983922829582) internal successors, (5217), 1555 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:33,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 5217 transitions. [2021-05-03 16:38:33,581 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 5217 transitions. Word has length 26 [2021-05-03 16:38:33,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:33,581 INFO L480 AbstractCegarLoop]: Abstraction has 1556 states and 5217 transitions. [2021-05-03 16:38:33,581 INFO L481 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) [2021-05-03 16:38:33,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 5217 transitions. [2021-05-03 16:38:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:38:33,583 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:33,583 INFO L551 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] [2021-05-03 16:38:33,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1293,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:33,804 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:33,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:33,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-05-03 16:38:33,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:33,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561356738] [2021-05-03 16:38:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:34,131 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-05-03 16:38:34,255 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-05-03 16:38:34,409 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 31 [2021-05-03 16:38:34,551 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-05-03 16:38:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:34,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561356738] [2021-05-03 16:38:34,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051903534] [2021-05-03 16:38:34,753 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:34,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:38:34,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:34,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:38:34,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:35,247 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:38:35,798 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 87 [2021-05-03 16:38:36,258 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_125], 6=[v_prenex_124, v_prenex_126]} [2021-05-03 16:38:36,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:36,315 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:38:36,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:38:36,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:36,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:36,355 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:38:36,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:38:36,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:36,709 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-05-03 16:38:36,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:36,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:36,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:36,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:38:36,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:36,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:36,785 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:38:36,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:38:36,788 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:37,069 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-03 16:38:37,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:37,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:37,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:37,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:37,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:37,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:37,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:38:37,111 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:37,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:37,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:37,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:37,141 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:38:37,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:38:37,142 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:37,390 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 16:38:37,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:37,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:37,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:37,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:37,434 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:38:37,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:38:37,436 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:37,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:37,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:37,468 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:38:37,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:38:37,472 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:37,696 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 16:38:37,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:37,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:38:37,726 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 13 variables, input treesize:433, output treesize:357 [2021-05-03 16:38:38,021 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-03 16:38:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:38,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:38,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:38:38,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947207108] [2021-05-03 16:38:38,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:38:38,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:38,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:38:38,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:38:38,073 INFO L87 Difference]: Start difference. First operand 1556 states and 5217 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:38,655 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2021-05-03 16:38:38,794 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 32 [2021-05-03 16:38:39,246 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 44 [2021-05-03 16:38:39,557 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-05-03 16:38:39,870 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 39 [2021-05-03 16:38:40,031 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-05-03 16:38:40,224 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-05-03 16:38:40,604 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2021-05-03 16:38:40,865 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-05-03 16:38:41,016 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-05-03 16:38:41,535 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-05-03 16:38:41,698 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2021-05-03 16:38:41,886 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-05-03 16:38:42,645 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 70 [2021-05-03 16:38:43,194 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2021-05-03 16:38:43,409 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2021-05-03 16:38:43,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:43,982 INFO L93 Difference]: Finished difference Result 2283 states and 7340 transitions. [2021-05-03 16:38:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:38:43,983 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:38:43,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:43,986 INFO L225 Difference]: With dead ends: 2283 [2021-05-03 16:38:43,986 INFO L226 Difference]: Without dead ends: 2261 [2021-05-03 16:38:43,986 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 6834.4ms TimeCoverageRelationStatistics Valid=474, Invalid=2282, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 16:38:43,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-05-03 16:38:44,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1570. [2021-05-03 16:38:44,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.3626513702995537) internal successors, (5276), 1569 states have internal predecessors, (5276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:44,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5276 transitions. [2021-05-03 16:38:44,008 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5276 transitions. Word has length 26 [2021-05-03 16:38:44,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:44,008 INFO L480 AbstractCegarLoop]: Abstraction has 1570 states and 5276 transitions. [2021-05-03 16:38:44,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:44,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5276 transitions. [2021-05-03 16:38:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:38:44,010 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:44,010 INFO L551 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] [2021-05-03 16:38:44,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1304,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:44,211 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:44,211 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-05-03 16:38:44,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:44,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903456177] [2021-05-03 16:38:44,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:44,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903456177] [2021-05-03 16:38:44,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380622575] [2021-05-03 16:38:44,931 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:38:44,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:38:44,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:44,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:38:44,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:45,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:45,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:45,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,000 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-05-03 16:38:46,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-05-03 16:38:46,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:46,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,046 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-05-03 16:38:46,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 29 [2021-05-03 16:38:46,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:46,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:46,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 47 [2021-05-03 16:38:46,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:46,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,131 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:38:46,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:38:46,132 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:46,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,177 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-05-03 16:38:46,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 22 [2021-05-03 16:38:46,180 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:46,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:46,221 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 25 treesize of output 41 [2021-05-03 16:38:46,231 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:46,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,280 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 16:38:46,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 33 [2021-05-03 16:38:46,286 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:46,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,326 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-05-03 16:38:46,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 28 [2021-05-03 16:38:46,328 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:46,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,367 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-05-03 16:38:46,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:38:46,369 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:46,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,413 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 16:38:46,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-05-03 16:38:46,419 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:46,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,463 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-05-03 16:38:46,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 28 [2021-05-03 16:38:46,465 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:46,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,492 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:38:46,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:38:46,493 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:46,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,519 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:38:46,519 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-05-03 16:38:46,521 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:46,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,555 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:38:46,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:38:46,557 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:46,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,595 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:38:46,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-05-03 16:38:46,597 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:46,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:46,634 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-05-03 16:38:46,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-05-03 16:38:46,637 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:46,976 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-05-03 16:38:46,977 INFO L628 ElimStorePlain]: treesize reduction 263, result has 37.7 percent of original size [2021-05-03 16:38:46,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:38:46,980 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:180 [2021-05-03 16:38:47,155 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 16:38:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:47,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:47,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-03 16:38:47,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115879368] [2021-05-03 16:38:47,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:38:47,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:47,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:38:47,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:38:47,201 INFO L87 Difference]: Start difference. First operand 1570 states and 5276 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:48,444 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-05-03 16:38:48,592 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-03 16:38:48,746 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-05-03 16:38:48,915 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-03 16:38:49,334 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-05-03 16:38:49,513 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-05-03 16:38:50,014 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-05-03 16:38:50,184 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-05-03 16:38:50,783 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-05-03 16:38:51,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:51,501 INFO L93 Difference]: Finished difference Result 2436 states and 7650 transitions. [2021-05-03 16:38:51,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:38:51,502 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:38:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:51,506 INFO L225 Difference]: With dead ends: 2436 [2021-05-03 16:38:51,506 INFO L226 Difference]: Without dead ends: 2406 [2021-05-03 16:38:51,506 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 4442.3ms TimeCoverageRelationStatistics Valid=513, Invalid=2909, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 16:38:51,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2021-05-03 16:38:51,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 1617. [2021-05-03 16:38:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 3.359529702970297) internal successors, (5429), 1616 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:51,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 5429 transitions. [2021-05-03 16:38:51,529 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 5429 transitions. Word has length 26 [2021-05-03 16:38:51,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:51,529 INFO L480 AbstractCegarLoop]: Abstraction has 1617 states and 5429 transitions. [2021-05-03 16:38:51,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:51,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 5429 transitions. [2021-05-03 16:38:51,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:38:51,532 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:51,532 INFO L551 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] [2021-05-03 16:38:51,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1380,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:51,749 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:51,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:51,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1936410854, now seen corresponding path program 24 times [2021-05-03 16:38:51,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:51,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048198827] [2021-05-03 16:38:51,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:51,980 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-05-03 16:38:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:52,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048198827] [2021-05-03 16:38:52,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812149259] [2021-05-03 16:38:52,288 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:52,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:38:52,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:52,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 16:38:52,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:52,857 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-03 16:38:53,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:53,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:53,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 41 [2021-05-03 16:38:53,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:53,505 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-05-03 16:38:53,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:53,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:53,540 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-05-03 16:38:53,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-05-03 16:38:53,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:53,739 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-05-03 16:38:53,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:53,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:53,771 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-05-03 16:38:53,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:38:53,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:53,973 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-05-03 16:38:53,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:53,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,005 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-05-03 16:38:54,005 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-05-03 16:38:54,007 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,238 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-05-03 16:38:54,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:54,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,266 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-05-03 16:38:54,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:38:54,270 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,468 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-05-03 16:38:54,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:54,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:54,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-05-03 16:38:54,501 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,690 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-05-03 16:38:54,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:54,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:54,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 41 [2021-05-03 16:38:54,718 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,910 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-05-03 16:38:54,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:54,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,943 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-05-03 16:38:54,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:38:54,945 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:55,135 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-05-03 16:38:55,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:55,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:38:55,150 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:445, output treesize:504 [2021-05-03 16:38:55,593 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-05-03 16:38:55,782 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 16:38:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:55,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:55,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:38:55,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902880620] [2021-05-03 16:38:55,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:38:55,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:55,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:38:55,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:38:55,934 INFO L87 Difference]: Start difference. First operand 1617 states and 5429 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) [2021-05-03 16:38:56,217 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 25 [2021-05-03 16:38:56,691 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2021-05-03 16:38:57,144 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 54 [2021-05-03 16:38:57,516 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 52 [2021-05-03 16:38:57,686 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-05-03 16:38:57,950 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-05-03 16:38:58,449 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 55 [2021-05-03 16:38:58,605 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-03 16:38:58,820 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-05-03 16:38:59,197 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-05-03 16:38:59,873 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-05-03 16:39:00,413 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 84 [2021-05-03 16:39:01,083 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-05-03 16:39:01,450 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:39:01,870 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2021-05-03 16:39:02,451 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-05-03 16:39:03,162 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-05-03 16:39:03,521 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-05-03 16:39:04,432 WARN L205 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 70 [2021-05-03 16:39:04,889 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 45 [2021-05-03 16:39:04,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:04,960 INFO L93 Difference]: Finished difference Result 2483 states and 7942 transitions. [2021-05-03 16:39:04,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:39:04,961 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 [2021-05-03 16:39:04,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:04,965 INFO L225 Difference]: With dead ends: 2483 [2021-05-03 16:39:04,965 INFO L226 Difference]: Without dead ends: 2449 [2021-05-03 16:39:04,965 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 9822.0ms TimeCoverageRelationStatistics Valid=396, Invalid=1956, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:39:04,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-05-03 16:39:04,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1632. [2021-05-03 16:39:04,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.3678724708767627) internal successors, (5493), 1631 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:04,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5493 transitions. [2021-05-03 16:39:04,986 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5493 transitions. Word has length 26 [2021-05-03 16:39:04,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:04,986 INFO L480 AbstractCegarLoop]: Abstraction has 1632 states and 5493 transitions. [2021-05-03 16:39:04,987 INFO L481 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) [2021-05-03 16:39:04,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5493 transitions. [2021-05-03 16:39:04,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:04,988 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:04,988 INFO L551 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] [2021-05-03 16:39:05,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1507,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:39:05,189 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:05,189 INFO L82 PathProgramCache]: Analyzing trace with hash 885830154, now seen corresponding path program 25 times [2021-05-03 16:39:05,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:05,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632506774] [2021-05-03 16:39:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:05,424 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-03 16:39:05,540 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-05-03 16:39:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:05,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632506774] [2021-05-03 16:39:05,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854798504] [2021-05-03 16:39:05,743 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 [2021-05-03 16:39:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:05,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:39:05,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:06,374 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:39:06,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:06,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:06,449 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 24 [2021-05-03 16:39:06,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,613 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-03 16:39:06,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:06,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:06,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:06,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:39:06,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,797 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-03 16:39:06,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:06,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:06,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:06,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:39:06,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,988 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-05-03 16:39:06,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:06,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:07,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:07,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:39:07,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:07,159 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-05-03 16:39:07,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:07,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:07,177 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:39:07,177 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 [2021-05-03 16:39:07,179 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:07,327 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-05-03 16:39:07,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:07,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:07,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:07,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:39:07,349 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:07,498 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 16:39:07,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:07,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:07,515 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:39:07,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:39:07,517 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:07,656 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-05-03 16:39:07,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:07,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:07,671 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:39:07,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:39:07,674 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:07,806 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-03 16:39:07,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:07,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:39:07,814 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-05-03 16:39:07,939 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:39:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:08,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:08,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:39:08,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280536176] [2021-05-03 16:39:08,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:39:08,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:08,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:39:08,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:39:08,087 INFO L87 Difference]: Start difference. First operand 1632 states and 5493 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) [2021-05-03 16:39:08,293 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 26 [2021-05-03 16:39:08,520 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-05-03 16:39:08,891 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-05-03 16:39:09,072 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-05-03 16:39:09,658 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-05-03 16:39:10,243 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-05-03 16:39:10,673 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-05-03 16:39:10,908 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-05-03 16:39:11,454 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-05-03 16:39:11,736 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-05-03 16:39:12,106 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-05-03 16:39:12,488 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-05-03 16:39:12,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:12,704 INFO L93 Difference]: Finished difference Result 2652 states and 8518 transitions. [2021-05-03 16:39:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:39:12,705 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 [2021-05-03 16:39:12,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:12,709 INFO L225 Difference]: With dead ends: 2652 [2021-05-03 16:39:12,709 INFO L226 Difference]: Without dead ends: 2618 [2021-05-03 16:39:12,710 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 4656.2ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 16:39:12,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2021-05-03 16:39:12,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 1646. [2021-05-03 16:39:12,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1645 states have (on average 3.374468085106383) internal successors, (5551), 1645 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:12,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 5551 transitions. [2021-05-03 16:39:12,736 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 5551 transitions. Word has length 26 [2021-05-03 16:39:12,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:12,736 INFO L480 AbstractCegarLoop]: Abstraction has 1646 states and 5551 transitions. [2021-05-03 16:39:12,736 INFO L481 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) [2021-05-03 16:39:12,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 5551 transitions. [2021-05-03 16:39:12,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:12,738 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:12,738 INFO L551 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] [2021-05-03 16:39:12,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1538 [2021-05-03 16:39:12,939 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:12,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:12,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-05-03 16:39:12,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:12,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98456124] [2021-05-03 16:39:12,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:13,409 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-03 16:39:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:13,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98456124] [2021-05-03 16:39:13,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954648770] [2021-05-03 16:39:13,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:39:13,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:39:13,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:39:13,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:39:13,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:14,123 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-03 16:39:14,417 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-05-03 16:39:14,723 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2021-05-03 16:39:14,869 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_182, v_prenex_178], 6=[A, v_prenex_180]} [2021-05-03 16:39:14,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:14,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:14,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:14,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:39:14,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:14,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:14,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:14,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:39:14,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:15,089 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2021-05-03 16:39:15,089 INFO L628 ElimStorePlain]: treesize reduction 152, result has 43.3 percent of original size [2021-05-03 16:39:15,090 INFO L518 ElimStorePlain]: Eliminatee v_prenex_178 vanished before elimination [2021-05-03 16:39:15,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:15,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:15,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:39:15,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:15,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:15,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:15,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:15,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:15,158 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 29 treesize of output 13 [2021-05-03 16:39:15,159 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:15,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:15,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:39:15,208 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:329, output treesize:31 [2021-05-03 16:39:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:15,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:15,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-05-03 16:39:15,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978636776] [2021-05-03 16:39:15,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:39:15,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:15,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:39:15,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:39:15,250 INFO L87 Difference]: Start difference. First operand 1646 states and 5551 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:15,571 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-05-03 16:39:16,127 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-05-03 16:39:16,270 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-05-03 16:39:17,071 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 33 [2021-05-03 16:39:17,279 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 16:39:17,459 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-05-03 16:39:17,726 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:39:17,975 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-05-03 16:39:18,122 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-05-03 16:39:18,588 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-05-03 16:39:18,854 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-03 16:39:19,069 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-05-03 16:39:19,532 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 76 [2021-05-03 16:39:20,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:20,379 INFO L93 Difference]: Finished difference Result 2533 states and 8068 transitions. [2021-05-03 16:39:20,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 16:39:20,380 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:39:20,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:20,384 INFO L225 Difference]: With dead ends: 2533 [2021-05-03 16:39:20,384 INFO L226 Difference]: Without dead ends: 2503 [2021-05-03 16:39:20,384 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 5582.7ms TimeCoverageRelationStatistics Valid=499, Invalid=2153, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:39:20,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2021-05-03 16:39:20,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1730. [2021-05-03 16:39:20,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 3.3846153846153846) internal successors, (5852), 1729 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:20,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5852 transitions. [2021-05-03 16:39:20,408 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5852 transitions. Word has length 26 [2021-05-03 16:39:20,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:20,408 INFO L480 AbstractCegarLoop]: Abstraction has 1730 states and 5852 transitions. [2021-05-03 16:39:20,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:20,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5852 transitions. [2021-05-03 16:39:20,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:20,410 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:20,410 INFO L551 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] [2021-05-03 16:39:20,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1553 [2021-05-03 16:39:20,613 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:20,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:20,613 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-05-03 16:39:20,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:20,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243103457] [2021-05-03 16:39:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:20,842 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-05-03 16:39:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:21,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243103457] [2021-05-03 16:39:21,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551303128] [2021-05-03 16:39:21,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:39:21,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:39:21,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:39:21,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:39:21,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:22,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:22,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:39:22,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:22,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:22,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:39:22,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:22,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,210 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-05-03 16:39:22,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:39:22,213 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:22,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,240 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:22,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:39:22,241 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:22,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,279 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-05-03 16:39:22,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-05-03 16:39:22,282 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:22,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,323 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-05-03 16:39:22,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:39:22,325 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:22,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,364 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-05-03 16:39:22,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-05-03 16:39:22,366 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:22,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,394 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:22,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:39:22,395 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:22,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,421 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:22,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:39:22,423 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:22,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,451 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:22,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:39:22,452 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:22,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,477 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:22,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:39:22,478 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:22,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,516 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-05-03 16:39:22,516 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 28 treesize of output 23 [2021-05-03 16:39:22,519 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:22,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,547 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:22,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-05-03 16:39:22,548 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:22,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,575 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:22,575 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 41 treesize of output 1 [2021-05-03 16:39:22,577 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:22,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,601 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:22,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:39:22,603 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:22,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:22,629 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-05-03 16:39:22,629 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 30 treesize of output 25 [2021-05-03 16:39:22,631 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:22,779 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-05-03 16:39:22,779 INFO L628 ElimStorePlain]: treesize reduction 108, result has 46.3 percent of original size [2021-05-03 16:39:22,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:39:22,783 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:83 [2021-05-03 16:39:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:22,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:22,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-05-03 16:39:22,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961085331] [2021-05-03 16:39:22,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:39:22,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:22,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:39:22,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:39:22,953 INFO L87 Difference]: Start difference. First operand 1730 states and 5852 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:23,902 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-05-03 16:39:24,482 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2021-05-03 16:39:24,713 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-05-03 16:39:25,388 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2021-05-03 16:39:25,653 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-03 16:39:25,777 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-05-03 16:39:26,235 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-03 16:39:26,418 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-05-03 16:39:26,728 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-05-03 16:39:26,873 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-05-03 16:39:27,194 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2021-05-03 16:39:27,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:27,531 INFO L93 Difference]: Finished difference Result 2949 states and 9251 transitions. [2021-05-03 16:39:27,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 16:39:27,532 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 [2021-05-03 16:39:27,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:27,537 INFO L225 Difference]: With dead ends: 2949 [2021-05-03 16:39:27,537 INFO L226 Difference]: Without dead ends: 2901 [2021-05-03 16:39:27,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 4828.6ms TimeCoverageRelationStatistics Valid=626, Invalid=2566, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 16:39:27,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2021-05-03 16:39:27,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 1752. [2021-05-03 16:39:27,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.3872073101085096) internal successors, (5931), 1751 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:27,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5931 transitions. [2021-05-03 16:39:27,564 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5931 transitions. Word has length 26 [2021-05-03 16:39:27,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:27,564 INFO L480 AbstractCegarLoop]: Abstraction has 1752 states and 5931 transitions. [2021-05-03 16:39:27,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:27,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5931 transitions. [2021-05-03 16:39:27,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:27,567 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:27,567 INFO L551 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] [2021-05-03 16:39:27,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1572 [2021-05-03 16:39:27,788 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:27,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:27,788 INFO L82 PathProgramCache]: Analyzing trace with hash 2079051698, now seen corresponding path program 26 times [2021-05-03 16:39:27,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:27,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535483252] [2021-05-03 16:39:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:28,022 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-05-03 16:39:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:28,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535483252] [2021-05-03 16:39:28,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198175542] [2021-05-03 16:39:28,280 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:39:28,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:39:28,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:39:28,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:39:28,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:28,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:28,684 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:28,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:39:28,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:28,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:28,698 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:28,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:39:28,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:28,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:28,711 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:28,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:39:28,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:28,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:28,731 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:39:28,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:39:28,733 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:28,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:28,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:28,750 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 33 treesize of output 27 [2021-05-03 16:39:28,752 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:28,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:28,770 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:39:28,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:39:28,773 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:28,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:28,786 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:28,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:39:28,788 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:28,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:28,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:28,806 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 26 treesize of output 24 [2021-05-03 16:39:28,808 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:28,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:28,821 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:28,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:39:28,823 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:28,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:28,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:28,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:39:28,845 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:28,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:28,859 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:28,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-05-03 16:39:28,861 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:28,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:28,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:28,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:39:28,882 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:28,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:28,900 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:39:28,900 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 28 treesize of output 20 [2021-05-03 16:39:28,902 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:28,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:28,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:28,918 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 24 [2021-05-03 16:39:28,924 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:28,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:28,937 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:28,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:39:28,939 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:28,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:28,947 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:28,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:39:28,948 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:29,063 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:39:29,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:29,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:39:29,065 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-05-03 16:39:29,209 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:39:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:29,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:29,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:39:29,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211424253] [2021-05-03 16:39:29,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:39:29,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:29,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:39:29,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:39:29,361 INFO L87 Difference]: Start difference. First operand 1752 states and 5931 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) [2021-05-03 16:39:29,607 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 21 [2021-05-03 16:39:29,973 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-05-03 16:39:30,132 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-05-03 16:39:30,502 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-05-03 16:39:30,812 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-03 16:39:31,097 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 45 [2021-05-03 16:39:31,463 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-05-03 16:39:31,825 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-05-03 16:39:32,018 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-05-03 16:39:32,158 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:39:32,449 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-03 16:39:32,792 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-05-03 16:39:33,253 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-05-03 16:39:33,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:33,335 INFO L93 Difference]: Finished difference Result 2355 states and 7783 transitions. [2021-05-03 16:39:33,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:39:33,336 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 [2021-05-03 16:39:33,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:33,339 INFO L225 Difference]: With dead ends: 2355 [2021-05-03 16:39:33,339 INFO L226 Difference]: Without dead ends: 2336 [2021-05-03 16:39:33,340 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 4145.9ms TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 16:39:33,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-05-03 16:39:33,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1738. [2021-05-03 16:39:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 3.379965457685665) internal successors, (5871), 1737 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 5871 transitions. [2021-05-03 16:39:33,375 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 5871 transitions. Word has length 26 [2021-05-03 16:39:33,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:33,375 INFO L480 AbstractCegarLoop]: Abstraction has 1738 states and 5871 transitions. [2021-05-03 16:39:33,375 INFO L481 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) [2021-05-03 16:39:33,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 5871 transitions. [2021-05-03 16:39:33,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:33,377 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:33,377 INFO L551 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] [2021-05-03 16:39:33,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1675,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:39:33,579 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:33,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:33,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 27 times [2021-05-03 16:39:33,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:33,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351201386] [2021-05-03 16:39:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:33,976 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-05-03 16:39:34,208 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-05-03 16:39:34,387 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-03 16:39:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:34,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351201386] [2021-05-03 16:39:34,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146803635] [2021-05-03 16:39:34,521 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 [2021-05-03 16:39:34,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:39:34,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:39:34,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 16:39:34,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:34,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:34,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:34,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:34,933 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-05-03 16:39:34,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 27 [2021-05-03 16:39:34,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:34,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:34,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:34,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:34,969 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-05-03 16:39:34,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:39:34,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:34,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:34,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:34,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:34,990 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-05-03 16:39:34,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:39:34,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,027 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-05-03 16:39:35,028 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 37 treesize of output 26 [2021-05-03 16:39:35,030 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:35,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,049 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-05-03 16:39:35,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:39:35,051 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,069 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-05-03 16:39:35,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:39:35,071 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:35,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,118 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-05-03 16:39:35,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-05-03 16:39:35,121 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:35,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,141 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-05-03 16:39:35,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:39:35,142 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:35,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:35,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 28 [2021-05-03 16:39:35,184 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:35,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 37 [2021-05-03 16:39:35,217 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:35,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2021-05-03 16:39:35,255 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,276 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-05-03 16:39:35,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:39:35,277 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,299 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-05-03 16:39:35,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:39:35,300 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,320 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-05-03 16:39:35,321 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 40 treesize of output 22 [2021-05-03 16:39:35,322 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:35,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,358 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-05-03 16:39:35,358 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-05-03 16:39:35,360 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:35,390 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-05-03 16:39:35,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 30 [2021-05-03 16:39:35,397 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,616 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:39:35,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:35,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:39:35,620 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:905, output treesize:313 [2021-05-03 16:39:35,868 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:39:36,125 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:39:36,575 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-05-03 16:39:36,776 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-05-03 16:39:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:36,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:36,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-05-03 16:39:36,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690685887] [2021-05-03 16:39:36,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:39:36,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:36,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:39:36,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:39:36,790 INFO L87 Difference]: Start difference. First operand 1738 states and 5871 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:38,151 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-03 16:39:38,538 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-05-03 16:39:38,822 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-05-03 16:39:39,205 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-05-03 16:39:39,759 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-05-03 16:39:40,388 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-05-03 16:39:40,931 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-05-03 16:39:41,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:41,221 INFO L93 Difference]: Finished difference Result 2428 states and 7983 transitions. [2021-05-03 16:39:41,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 16:39:41,224 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:39:41,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:41,227 INFO L225 Difference]: With dead ends: 2428 [2021-05-03 16:39:41,228 INFO L226 Difference]: Without dead ends: 2378 [2021-05-03 16:39:41,228 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 5298.3ms TimeCoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:39:41,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-05-03 16:39:41,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 1738. [2021-05-03 16:39:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 3.379965457685665) internal successors, (5871), 1737 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:41,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 5871 transitions. [2021-05-03 16:39:41,255 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 5871 transitions. Word has length 26 [2021-05-03 16:39:41,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:41,255 INFO L480 AbstractCegarLoop]: Abstraction has 1738 states and 5871 transitions. [2021-05-03 16:39:41,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:41,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 5871 transitions. [2021-05-03 16:39:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:41,258 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:41,258 INFO L551 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] [2021-05-03 16:39:41,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1692,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:39:41,458 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:41,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:41,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1946487342, now seen corresponding path program 48 times [2021-05-03 16:39:41,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:41,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754142349] [2021-05-03 16:39:41,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:41,703 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-05-03 16:39:41,836 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-05-03 16:39:41,962 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2021-05-03 16:39:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:42,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754142349] [2021-05-03 16:39:42,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642279716] [2021-05-03 16:39:42,171 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:39:42,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:39:42,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:39:42,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:39:42,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:43,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:39:43,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:43,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:39:43,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:43,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:39:43,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:43,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:39:43,068 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:43,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-05-03 16:39:43,082 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:43,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-05-03 16:39:43,098 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:43,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-05-03 16:39:43,115 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:43,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-05-03 16:39:43,129 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:43,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:39:43,143 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:43,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:39:43,170 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:43,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-05-03 16:39:43,189 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:43,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-05-03 16:39:43,204 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:43,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-05-03 16:39:43,217 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:43,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:39:43,230 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:43,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-05-03 16:39:43,243 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:43,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:43,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:43,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-05-03 16:39:43,251 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:43,303 INFO L628 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-05-03 16:39:43,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:39:43,305 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-05-03 16:39:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:43,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:43,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 16:39:43,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946858823] [2021-05-03 16:39:43,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:39:43,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:43,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:39:43,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:39:43,365 INFO L87 Difference]: Start difference. First operand 1738 states and 5871 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:44,104 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-05-03 16:39:44,517 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2021-05-03 16:39:44,704 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-05-03 16:39:45,109 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-05-03 16:39:45,252 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 34 [2021-05-03 16:39:45,802 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-05-03 16:39:45,953 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-05-03 16:39:46,530 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-05-03 16:39:46,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:46,681 INFO L93 Difference]: Finished difference Result 2197 states and 7216 transitions. [2021-05-03 16:39:46,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 16:39:46,682 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 [2021-05-03 16:39:46,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:46,686 INFO L225 Difference]: With dead ends: 2197 [2021-05-03 16:39:46,686 INFO L226 Difference]: Without dead ends: 2175 [2021-05-03 16:39:46,686 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 3502.8ms TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 16:39:46,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-05-03 16:39:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1734. [2021-05-03 16:39:46,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.378534333525678) internal successors, (5855), 1733 states have internal predecessors, (5855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:46,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5855 transitions. [2021-05-03 16:39:46,707 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5855 transitions. Word has length 26 [2021-05-03 16:39:46,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:46,707 INFO L480 AbstractCegarLoop]: Abstraction has 1734 states and 5855 transitions. [2021-05-03 16:39:46,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:46,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5855 transitions. [2021-05-03 16:39:46,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:46,709 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:46,709 INFO L551 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] [2021-05-03 16:39:46,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1733,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:39:46,909 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:46,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:46,910 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-05-03 16:39:46,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:46,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288343421] [2021-05-03 16:39:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:47,172 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-03 16:39:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:47,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288343421] [2021-05-03 16:39:47,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123101496] [2021-05-03 16:39:47,633 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:39:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:47,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:39:47,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:48,193 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-05-03 16:39:48,278 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_186, v_prenex_188], 6=[A, v_prenex_184]} [2021-05-03 16:39:48,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:48,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:48,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:48,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-05-03 16:39:48,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:48,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:48,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:48,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:39:48,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:48,493 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-05-03 16:39:48,493 INFO L628 ElimStorePlain]: treesize reduction 168, result has 46.7 percent of original size [2021-05-03 16:39:48,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:48,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:48,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 16:39:48,502 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:48,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:48,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:48,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:48,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:48,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:48,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-05-03 16:39:48,579 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:48,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:48,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:48,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:48,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:39:48,646 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:48,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:48,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:39:48,699 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:381, output treesize:42 [2021-05-03 16:39:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:48,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:48,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 16:39:48,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259352114] [2021-05-03 16:39:48,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:39:48,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:48,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:39:48,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:39:48,782 INFO L87 Difference]: Start difference. First operand 1734 states and 5855 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:49,705 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 39 [2021-05-03 16:39:49,860 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 40 [2021-05-03 16:39:50,419 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-05-03 16:39:50,624 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2021-05-03 16:39:50,884 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2021-05-03 16:39:51,280 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-05-03 16:39:51,507 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-05-03 16:39:51,813 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2021-05-03 16:39:52,046 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2021-05-03 16:39:52,637 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-05-03 16:39:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:52,916 INFO L93 Difference]: Finished difference Result 2395 states and 7862 transitions. [2021-05-03 16:39:52,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:39:52,917 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 [2021-05-03 16:39:52,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:52,921 INFO L225 Difference]: With dead ends: 2395 [2021-05-03 16:39:52,921 INFO L226 Difference]: Without dead ends: 2380 [2021-05-03 16:39:52,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 4271.8ms TimeCoverageRelationStatistics Valid=407, Invalid=1755, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:39:52,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-05-03 16:39:52,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1734. [2021-05-03 16:39:52,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.378534333525678) internal successors, (5855), 1733 states have internal predecessors, (5855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:52,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5855 transitions. [2021-05-03 16:39:52,942 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5855 transitions. Word has length 26 [2021-05-03 16:39:52,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:52,942 INFO L480 AbstractCegarLoop]: Abstraction has 1734 states and 5855 transitions. [2021-05-03 16:39:52,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:52,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5855 transitions. [2021-05-03 16:39:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:52,944 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:52,944 INFO L551 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] [2021-05-03 16:39:53,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1847,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:39:53,145 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:53,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:53,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1611336786, now seen corresponding path program 50 times [2021-05-03 16:39:53,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:53,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144131114] [2021-05-03 16:39:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:53,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144131114] [2021-05-03 16:39:53,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128652827] [2021-05-03 16:39:53,755 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:39:53,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:39:53,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:39:53,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:39:53,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:54,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,147 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-05-03 16:39:54,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-05-03 16:39:54,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,197 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-05-03 16:39:54,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:39:54,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,241 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-05-03 16:39:54,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:39:54,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,288 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-05-03 16:39:54,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-05-03 16:39:54,291 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,319 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-05-03 16:39:54,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:39:54,321 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,367 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-05-03 16:39:54,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:39:54,369 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,418 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-05-03 16:39:54,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:39:54,425 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,455 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-05-03 16:39:54,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:39:54,456 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,488 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-05-03 16:39:54,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:39:54,489 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,534 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-05-03 16:39:54,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 23 [2021-05-03 16:39:54,536 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:54,584 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 25 treesize of output 43 [2021-05-03 16:39:54,594 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,629 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-05-03 16:39:54,629 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 [2021-05-03 16:39:54,631 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,660 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-05-03 16:39:54,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:39:54,662 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,690 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-05-03 16:39:54,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:39:54,691 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,724 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-05-03 16:39:54,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:39:54,726 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,749 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-05-03 16:39:54,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-05-03 16:39:54,750 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,971 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 16:39:54,971 INFO L628 ElimStorePlain]: treesize reduction 76, result has 55.0 percent of original size [2021-05-03 16:39:54,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:39:54,973 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-05-03 16:39:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:55,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:55,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-05-03 16:39:55,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627929335] [2021-05-03 16:39:55,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:39:55,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:55,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:39:55,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:39:55,148 INFO L87 Difference]: Start difference. First operand 1734 states and 5855 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) [2021-05-03 16:39:55,784 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-05-03 16:39:55,932 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-05-03 16:39:56,070 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-05-03 16:39:56,231 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-05-03 16:39:56,657 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 27 [2021-05-03 16:39:57,441 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-05-03 16:39:57,935 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-05-03 16:39:58,213 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 38 [2021-05-03 16:39:58,441 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-03 16:39:58,798 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-05-03 16:39:59,035 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-05-03 16:39:59,214 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-05-03 16:39:59,461 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-05-03 16:39:59,672 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-05-03 16:39:59,826 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-05-03 16:40:00,269 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-03 16:40:00,414 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-05-03 16:40:00,792 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-05-03 16:40:01,103 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 16:40:01,297 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2021-05-03 16:40:01,587 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-05-03 16:40:01,759 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2021-05-03 16:40:02,047 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-05-03 16:40:02,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:02,137 INFO L93 Difference]: Finished difference Result 3202 states and 10123 transitions. [2021-05-03 16:40:02,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 16:40:02,138 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 [2021-05-03 16:40:02,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:02,143 INFO L225 Difference]: With dead ends: 3202 [2021-05-03 16:40:02,143 INFO L226 Difference]: Without dead ends: 3138 [2021-05-03 16:40:02,144 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 6437.2ms TimeCoverageRelationStatistics Valid=727, Invalid=3055, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 16:40:02,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2021-05-03 16:40:02,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 1784. [2021-05-03 16:40:02,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 3.378014582164891) internal successors, (6023), 1783 states have internal predecessors, (6023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 6023 transitions. [2021-05-03 16:40:02,171 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 6023 transitions. Word has length 26 [2021-05-03 16:40:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:02,171 INFO L480 AbstractCegarLoop]: Abstraction has 1784 states and 6023 transitions. [2021-05-03 16:40:02,171 INFO L481 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) [2021-05-03 16:40:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 6023 transitions. [2021-05-03 16:40:02,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:02,173 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:02,174 INFO L551 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] [2021-05-03 16:40:02,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1861 [2021-05-03 16:40:02,374 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:02,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:02,374 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-05-03 16:40:02,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:02,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51017273] [2021-05-03 16:40:02,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:02,916 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-03 16:40:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:40:03,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51017273] [2021-05-03 16:40:03,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751789951] [2021-05-03 16:40:03,110 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:40:03,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:40:03,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:40:03,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:40:03,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:04,115 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:40:04,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:04,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:04,537 INFO L354 Elim1Store]: treesize reduction 22, result has 46.3 percent of original size [2021-05-03 16:40:04,537 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 34 [2021-05-03 16:40:04,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:04,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:04,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:04,617 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-05-03 16:40:04,617 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 41 [2021-05-03 16:40:04,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:05,399 WARN L205 SmtUtils]: Spent 776.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-05-03 16:40:05,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:05,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:05,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:05,495 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-05-03 16:40:05,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 38 [2021-05-03 16:40:05,505 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:05,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:05,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:05,594 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-05-03 16:40:05,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 51 [2021-05-03 16:40:05,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:06,504 WARN L205 SmtUtils]: Spent 900.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-05-03 16:40:06,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:06,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:06,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:06,586 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-05-03 16:40:06,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 45 [2021-05-03 16:40:06,593 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:06,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:06,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:06,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:06,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 59 [2021-05-03 16:40:06,667 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:09,004 WARN L205 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 169 DAG size of output: 158 [2021-05-03 16:40:09,005 INFO L628 ElimStorePlain]: treesize reduction 75, result has 91.6 percent of original size [2021-05-03 16:40:09,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:09,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:09,088 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-05-03 16:40:09,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 45 [2021-05-03 16:40:09,095 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:09,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:09,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:09,158 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-05-03 16:40:09,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 38 [2021-05-03 16:40:09,178 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:09,851 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-05-03 16:40:09,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:09,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:09,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:09,941 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-05-03 16:40:09,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 45 [2021-05-03 16:40:09,949 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:09,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:09,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:10,001 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-05-03 16:40:10,001 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 28 [2021-05-03 16:40:10,004 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:10,695 WARN L205 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-05-03 16:40:10,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:10,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:10,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:10,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:10,761 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 [2021-05-03 16:40:10,779 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:10,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:10,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:10,838 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-05-03 16:40:10,838 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 [2021-05-03 16:40:10,846 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:11,467 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-05-03 16:40:11,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:11,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:11,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:11,558 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-05-03 16:40:11,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 45 [2021-05-03 16:40:11,565 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:11,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:11,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:11,633 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-05-03 16:40:11,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 47 [2021-05-03 16:40:11,642 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:12,924 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 132 DAG size of output: 130 [2021-05-03 16:40:12,925 INFO L628 ElimStorePlain]: treesize reduction 17, result has 97.5 percent of original size [2021-05-03 16:40:12,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:12,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:12,988 INFO L354 Elim1Store]: treesize reduction 22, result has 46.3 percent of original size [2021-05-03 16:40:12,988 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 34 [2021-05-03 16:40:12,991 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:13,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:13,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:13,046 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-05-03 16:40:13,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:40:13,056 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:14,170 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 122 DAG size of output: 119 [2021-05-03 16:40:14,171 INFO L628 ElimStorePlain]: treesize reduction 46, result has 92.9 percent of original size [2021-05-03 16:40:14,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-05-03 16:40:14,197 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:953, output treesize:1025 [2021-05-03 16:40:14,949 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-05-03 16:40:15,240 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 16:40:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:40:15,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:40:15,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-03 16:40:15,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341789021] [2021-05-03 16:40:15,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:40:15,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:40:15,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:40:15,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:40:15,339 INFO L87 Difference]: Start difference. First operand 1784 states and 6023 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:15,730 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2021-05-03 16:40:16,150 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-05-03 16:40:16,405 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-05-03 16:40:16,703 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-05-03 16:40:16,881 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-05-03 16:40:17,041 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 25 [2021-05-03 16:40:17,358 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 38 [2021-05-03 16:40:17,567 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2021-05-03 16:40:17,757 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-05-03 16:40:17,924 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-05-03 16:40:18,128 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-05-03 16:40:18,526 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:40:18,738 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-05-03 16:40:18,900 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-05-03 16:40:19,105 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2021-05-03 16:40:19,447 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-05-03 16:40:19,863 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2021-05-03 16:40:20,152 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-05-03 16:40:20,455 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-05-03 16:40:20,700 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-05-03 16:40:21,224 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2021-05-03 16:40:25,214 WARN L205 SmtUtils]: Spent 3.85 s on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-05-03 16:40:25,409 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2021-05-03 16:40:25,565 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-03 16:40:26,282 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-05-03 16:40:34,380 WARN L205 SmtUtils]: Spent 7.93 s on a formula simplification. DAG size of input: 121 DAG size of output: 69 [2021-05-03 16:40:34,611 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-05-03 16:40:35,322 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 16:40:35,783 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-05-03 16:40:36,059 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 30 [2021-05-03 16:40:36,322 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2021-05-03 16:40:36,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:36,573 INFO L93 Difference]: Finished difference Result 2935 states and 9497 transitions. [2021-05-03 16:40:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:40:36,575 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:40:36,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:36,579 INFO L225 Difference]: With dead ends: 2935 [2021-05-03 16:40:36,579 INFO L226 Difference]: Without dead ends: 2890 [2021-05-03 16:40:36,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 21939.8ms TimeCoverageRelationStatistics Valid=621, Invalid=2919, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 16:40:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2021-05-03 16:40:36,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 1811. [2021-05-03 16:40:36,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.387292817679558) internal successors, (6131), 1810 states have internal predecessors, (6131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:36,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6131 transitions. [2021-05-03 16:40:36,607 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6131 transitions. Word has length 26 [2021-05-03 16:40:36,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:36,607 INFO L480 AbstractCegarLoop]: Abstraction has 1811 states and 6131 transitions. [2021-05-03 16:40:36,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:36,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6131 transitions. [2021-05-03 16:40:36,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:36,609 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:36,609 INFO L551 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] [2021-05-03 16:40:36,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1886 [2021-05-03 16:40:36,810 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:36,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:36,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-05-03 16:40:36,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:36,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464322383] [2021-05-03 16:40:36,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:37,131 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-05-03 16:40:37,287 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-03 16:40:37,476 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-05-03 16:40:37,624 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-05-03 16:40:37,748 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-05-03 16:40:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:40:37,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464322383] [2021-05-03 16:40:37,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195122141] [2021-05-03 16:40:37,922 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:40:37,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:40:37,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:40:37,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:40:37,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:38,719 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-05-03 16:40:38,992 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_212], 6=[v_prenex_210, v_prenex_214]} [2021-05-03 16:40:39,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:39,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:39,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:39,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:39,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:40:39,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:39,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:39,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:39,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:39,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-05-03 16:40:39,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:39,283 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-05-03 16:40:39,283 INFO L628 ElimStorePlain]: treesize reduction 154, result has 43.2 percent of original size [2021-05-03 16:40:39,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:39,291 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 [2021-05-03 16:40:39,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:39,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:39,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:39,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:39,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:39,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:39,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-05-03 16:40:39,400 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:39,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:39,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:39,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:39,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:39,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 16:40:39,485 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:39,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:39,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:40:39,555 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:337, output treesize:55 [2021-05-03 16:40:39,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:40:39,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:40:39,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 16:40:39,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484762194] [2021-05-03 16:40:39,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:40:39,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:40:39,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:40:39,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:40:39,666 INFO L87 Difference]: Start difference. First operand 1811 states and 6131 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:40,138 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2021-05-03 16:40:40,293 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2021-05-03 16:40:40,683 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2021-05-03 16:40:40,864 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 28 [2021-05-03 16:40:41,054 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 26 [2021-05-03 16:40:41,443 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2021-05-03 16:40:41,661 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2021-05-03 16:40:41,865 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-05-03 16:40:42,132 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-05-03 16:40:42,394 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 37 [2021-05-03 16:40:42,572 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-05-03 16:40:42,866 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-05-03 16:40:43,168 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-05-03 16:40:43,452 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-05-03 16:40:43,783 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-05-03 16:40:44,223 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-05-03 16:40:44,570 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2021-05-03 16:40:44,864 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-05-03 16:40:45,527 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-05-03 16:40:45,989 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-05-03 16:40:46,676 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-05-03 16:40:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:46,748 INFO L93 Difference]: Finished difference Result 2331 states and 7684 transitions. [2021-05-03 16:40:46,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:40:46,750 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 [2021-05-03 16:40:46,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:46,754 INFO L225 Difference]: With dead ends: 2331 [2021-05-03 16:40:46,755 INFO L226 Difference]: Without dead ends: 2316 [2021-05-03 16:40:46,755 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 7399.6ms TimeCoverageRelationStatistics Valid=421, Invalid=1835, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 16:40:46,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-05-03 16:40:46,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1809. [2021-05-03 16:40:46,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.3871681415929205) internal successors, (6124), 1808 states have internal predecessors, (6124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:46,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6124 transitions. [2021-05-03 16:40:46,779 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6124 transitions. Word has length 26 [2021-05-03 16:40:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:46,779 INFO L480 AbstractCegarLoop]: Abstraction has 1809 states and 6124 transitions. [2021-05-03 16:40:46,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6124 transitions. [2021-05-03 16:40:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:46,781 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:46,782 INFO L551 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] [2021-05-03 16:40:46,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1971,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:40:46,985 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:46,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:46,985 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-05-03 16:40:46,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:46,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103296928] [2021-05-03 16:40:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:46,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:47,284 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-03 16:40:47,447 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-05-03 16:40:47,850 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-05-03 16:40:48,030 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-05-03 16:40:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:40:48,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103296928] [2021-05-03 16:40:48,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521303583] [2021-05-03 16:40:48,152 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:40:48,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:40:48,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:40:48,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:40:48,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:49,309 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:40:49,748 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-05-03 16:40:50,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:50,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:50,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:50,235 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-05-03 16:40:50,235 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 32 treesize of output 30 [2021-05-03 16:40:50,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:50,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:50,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:50,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:50,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:50,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-05-03 16:40:50,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:51,206 WARN L205 SmtUtils]: Spent 892.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-05-03 16:40:51,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:51,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:51,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:51,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:51,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:51,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 51 [2021-05-03 16:40:51,297 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:51,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:51,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:51,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:51,360 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-05-03 16:40:51,360 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 41 treesize of output 37 [2021-05-03 16:40:51,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:54,010 WARN L205 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 164 DAG size of output: 155 [2021-05-03 16:40:54,011 INFO L628 ElimStorePlain]: treesize reduction 48, result has 94.7 percent of original size [2021-05-03 16:40:54,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:54,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:54,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:54,088 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-05-03 16:40:54,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-05-03 16:40:54,091 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:54,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:54,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:54,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:54,158 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-05-03 16:40:54,159 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 37 treesize of output 37 [2021-05-03 16:40:54,167 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:55,703 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 146 DAG size of output: 143 [2021-05-03 16:40:55,703 INFO L628 ElimStorePlain]: treesize reduction 42, result has 94.8 percent of original size [2021-05-03 16:40:55,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,785 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-05-03 16:40:55,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:40:55,791 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:55,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,852 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-05-03 16:40:55,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:40:55,855 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:56,592 WARN L205 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-05-03 16:40:56,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:56,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:56,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:56,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:56,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:56,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2021-05-03 16:40:56,682 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:56,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:56,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:56,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:56,716 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-05-03 16:40:56,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-05-03 16:40:56,718 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:57,395 WARN L205 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 16:40:57,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:57,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:57,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:57,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:57,471 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-05-03 16:40:57,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-05-03 16:40:57,474 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:57,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:57,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:57,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:57,535 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-05-03 16:40:57,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 37 [2021-05-03 16:40:57,539 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:58,179 WARN L205 SmtUtils]: Spent 639.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-03 16:40:58,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:58,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:58,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:58,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:58,248 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-05-03 16:40:58,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:40:58,252 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:58,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:58,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:58,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:58,308 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-05-03 16:40:58,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:40:58,317 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:59,371 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-05-03 16:40:59,372 INFO L628 ElimStorePlain]: treesize reduction 42, result has 92.7 percent of original size [2021-05-03 16:40:59,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:59,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:59,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:59,440 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-05-03 16:40:59,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-05-03 16:40:59,448 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:59,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:59,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:59,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:59,516 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-05-03 16:40:59,516 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 37 treesize of output 47 [2021-05-03 16:40:59,524 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:59,999 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-03 16:40:59,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:00,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-05-03 16:41:00,022 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:953, output treesize:554 [2021-05-03 16:41:00,343 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2021-05-03 16:41:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:41:00,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:41:00,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-05-03 16:41:00,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680384868] [2021-05-03 16:41:00,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 16:41:00,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:41:00,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 16:41:00,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:41:00,474 INFO L87 Difference]: Start difference. First operand 1809 states and 6124 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) [2021-05-03 16:41:01,330 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-05-03 16:41:01,549 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2021-05-03 16:41:02,015 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-05-03 16:41:02,451 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-05-03 16:41:02,664 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 36 [2021-05-03 16:41:03,448 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-05-03 16:41:03,732 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-05-03 16:41:03,929 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-05-03 16:41:04,203 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-05-03 16:41:04,595 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-05-03 16:41:04,912 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-05-03 16:41:05,197 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-05-03 16:41:16,075 WARN L205 SmtUtils]: Spent 10.58 s on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-05-03 16:41:16,286 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-05-03 16:41:16,525 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-05-03 16:41:29,787 WARN L205 SmtUtils]: Spent 13.03 s on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-05-03 16:41:42,725 WARN L205 SmtUtils]: Spent 12.76 s on a formula simplification. DAG size of input: 181 DAG size of output: 117 [2021-05-03 16:41:43,601 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-05-03 16:41:43,860 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 16:41:44,315 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-05-03 16:41:44,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:41:44,574 INFO L93 Difference]: Finished difference Result 2608 states and 8601 transitions. [2021-05-03 16:41:44,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:41:44,576 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 [2021-05-03 16:41:44,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:41:44,589 INFO L225 Difference]: With dead ends: 2608 [2021-05-03 16:41:44,589 INFO L226 Difference]: Without dead ends: 2578 [2021-05-03 16:41:44,590 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 44812.8ms TimeCoverageRelationStatistics Valid=430, Invalid=2120, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:41:44,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-05-03 16:41:44,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1812. [2021-05-03 16:41:44,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 3.3881833241303148) internal successors, (6136), 1811 states have internal predecessors, (6136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:41:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 6136 transitions. [2021-05-03 16:41:44,613 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 6136 transitions. Word has length 26 [2021-05-03 16:41:44,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:41:44,613 INFO L480 AbstractCegarLoop]: Abstraction has 1812 states and 6136 transitions. [2021-05-03 16:41:44,613 INFO L481 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) [2021-05-03 16:41:44,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 6136 transitions. [2021-05-03 16:41:44,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:41:44,615 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:41:44,615 INFO L551 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] [2021-05-03 16:41:44,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1985 [2021-05-03 16:41:44,816 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:41:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:41:44,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1072819888, now seen corresponding path program 54 times [2021-05-03 16:41:44,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:41:44,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428906691] [2021-05-03 16:41:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:41:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:41:45,214 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-03 16:41:45,478 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2021-05-03 16:41:45,776 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2021-05-03 16:41:46,026 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-05-03 16:41:46,207 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-03 16:41:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:41:46,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428906691] [2021-05-03 16:41:46,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331162519] [2021-05-03 16:41:46,348 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:41:46,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:41:46,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:41:46,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:41:46,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:41:46,935 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:41:47,136 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:41:48,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:41:48,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:48,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:41:48,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:48,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,189 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 33 treesize of output 13 [2021-05-03 16:41:48,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:48,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:41:48,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:48,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:41:48,285 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:48,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:41:48,327 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:48,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:41:48,366 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:48,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,402 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 41 treesize of output 13 [2021-05-03 16:41:48,407 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:48,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:41:48,447 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:48,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:41:48,487 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:48,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:41:48,522 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:48,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:41:48,557 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:48,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:41:48,587 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:48,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,613 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 39 treesize of output 19 [2021-05-03 16:41:48,616 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:48,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:48,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:48,629 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 39 treesize of output 16 [2021-05-03 16:41:48,632 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:48,730 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-05-03 16:41:48,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:41:48,733 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-05-03 16:41:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:41:48,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:41:48,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 16:41:48,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992241152] [2021-05-03 16:41:48,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:41:48,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:41:48,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:41:48,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:41:48,869 INFO L87 Difference]: Start difference. First operand 1812 states and 6136 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) [2021-05-03 16:41:49,338 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-05-03 16:41:49,608 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-05-03 16:41:49,925 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 16:41:50,122 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-05-03 16:41:50,480 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-05-03 16:41:50,852 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-05-03 16:41:51,160 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-05-03 16:41:51,458 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-05-03 16:41:51,718 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-05-03 16:41:52,259 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-05-03 16:41:52,687 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-05-03 16:41:52,988 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 16:41:53,521 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-05-03 16:41:53,866 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-05-03 16:41:54,182 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-03 16:41:54,707 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-05-03 16:41:55,126 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-05-03 16:41:55,672 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-05-03 16:41:56,142 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-05-03 16:41:56,776 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-05-03 16:41:57,565 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-05-03 16:41:58,189 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-05-03 16:41:58,893 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-05-03 16:41:59,799 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-05-03 16:42:00,574 WARN L205 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-05-03 16:42:01,615 WARN L205 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-05-03 16:42:02,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:42:02,417 INFO L93 Difference]: Finished difference Result 2406 states and 7706 transitions. [2021-05-03 16:42:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 16:42:02,420 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 [2021-05-03 16:42:02,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:42:02,423 INFO L225 Difference]: With dead ends: 2406 [2021-05-03 16:42:02,424 INFO L226 Difference]: Without dead ends: 2376 [2021-05-03 16:42:02,424 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 12923.1ms TimeCoverageRelationStatistics Valid=436, Invalid=1820, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 16:42:02,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-05-03 16:42:02,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1827. [2021-05-03 16:42:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.394852135815991) internal successors, (6199), 1826 states have internal predecessors, (6199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:42:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6199 transitions. [2021-05-03 16:42:02,447 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6199 transitions. Word has length 26 [2021-05-03 16:42:02,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:42:02,447 INFO L480 AbstractCegarLoop]: Abstraction has 1827 states and 6199 transitions. [2021-05-03 16:42:02,447 INFO L481 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) [2021-05-03 16:42:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6199 transitions. [2021-05-03 16:42:02,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:42:02,449 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:42:02,449 INFO L551 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] [2021-05-03 16:42:02,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2055,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:42:02,650 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:42:02,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:42:02,650 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 55 times [2021-05-03 16:42:02,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:42:02,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566766352] [2021-05-03 16:42:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:42:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:42:03,133 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-05-03 16:42:03,409 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2021-05-03 16:42:03,739 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-05-03 16:42:03,992 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 16:42:04,161 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-03 16:42:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:42:04,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566766352] [2021-05-03 16:42:04,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677690934] [2021-05-03 16:42:04,279 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:42:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:42:04,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:42:04,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:42:04,885 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:42:05,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,115 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-05-03 16:42:05,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:42:05,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:05,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,229 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-05-03 16:42:05,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 26 [2021-05-03 16:42:05,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:05,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,338 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-05-03 16:42:05,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:42:05,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:05,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,460 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-05-03 16:42:05,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:42:05,467 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,555 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-05-03 16:42:05,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:42:05,558 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:05,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,666 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-05-03 16:42:05,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:42:05,670 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:05,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,794 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-05-03 16:42:05,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:42:05,811 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:05,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,882 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-05-03 16:42:05,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-05-03 16:42:05,885 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:05,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,950 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-05-03 16:42:05,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-05-03 16:42:05,954 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:05,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:05,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,069 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-05-03 16:42:06,069 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 32 treesize of output 23 [2021-05-03 16:42:06,074 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:06,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:06,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:42:06,207 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:06,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,277 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-05-03 16:42:06,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:42:06,280 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:06,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,347 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-05-03 16:42:06,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:42:06,350 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:06,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,413 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-05-03 16:42:06,414 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 34 treesize of output 1 [2021-05-03 16:42:06,417 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:06,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,483 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-05-03 16:42:06,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:42:06,487 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:06,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:06,522 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-05-03 16:42:06,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-05-03 16:42:06,526 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:06,885 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 16:42:06,886 INFO L628 ElimStorePlain]: treesize reduction 76, result has 55.0 percent of original size [2021-05-03 16:42:06,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:42:06,889 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-05-03 16:42:07,122 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-05-03 16:42:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:42:07,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:42:07,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 16:42:07,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841017354] [2021-05-03 16:42:07,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:42:07,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:42:07,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:42:07,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:42:07,282 INFO L87 Difference]: Start difference. First operand 1827 states and 6199 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:42:07,609 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-05-03 16:42:07,758 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 20 [2021-05-03 16:42:08,006 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2021-05-03 16:42:08,362 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2021-05-03 16:42:08,754 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2021-05-03 16:42:09,053 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-05-03 16:42:09,272 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:42:09,810 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-03 16:42:10,162 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2021-05-03 16:42:10,486 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 35 [2021-05-03 16:42:10,811 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-05-03 16:42:11,504 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-05-03 16:42:11,803 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-05-03 16:42:12,167 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-05-03 16:42:12,599 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 38 [2021-05-03 16:42:12,939 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-05-03 16:42:13,537 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-05-03 16:42:14,377 WARN L205 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-05-03 16:42:14,621 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:42:15,060 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-05-03 16:42:15,587 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-05-03 16:42:16,041 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-05-03 16:42:16,257 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-03 16:42:16,720 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-05-03 16:42:17,298 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2021-05-03 16:42:17,987 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-05-03 16:42:18,427 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-05-03 16:42:19,159 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-05-03 16:42:19,727 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-05-03 16:42:20,283 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-05-03 16:42:21,166 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2021-05-03 16:42:21,948 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-05-03 16:42:22,219 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-05-03 16:42:22,884 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-05-03 16:42:23,657 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-05-03 16:42:24,046 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-03 16:42:24,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:42:24,140 INFO L93 Difference]: Finished difference Result 3227 states and 10321 transitions. [2021-05-03 16:42:24,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:42:24,143 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 [2021-05-03 16:42:24,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:42:24,148 INFO L225 Difference]: With dead ends: 3227 [2021-05-03 16:42:24,148 INFO L226 Difference]: Without dead ends: 3193 [2021-05-03 16:42:24,148 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 16330.7ms TimeCoverageRelationStatistics Valid=711, Invalid=2595, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 16:42:24,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2021-05-03 16:42:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 1832. [2021-05-03 16:42:24,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 3.399235390496996) internal successors, (6224), 1831 states have internal predecessors, (6224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:42:24,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6224 transitions. [2021-05-03 16:42:24,178 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6224 transitions. Word has length 26 [2021-05-03 16:42:24,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:42:24,178 INFO L480 AbstractCegarLoop]: Abstraction has 1832 states and 6224 transitions. [2021-05-03 16:42:24,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:42:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6224 transitions. [2021-05-03 16:42:24,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:42:24,181 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:42:24,181 INFO L551 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] [2021-05-03 16:42:24,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2169 [2021-05-03 16:42:24,381 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:42:24,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:42:24,381 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 28 times [2021-05-03 16:42:24,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:42:24,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207123078] [2021-05-03 16:42:24,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:42:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:42:24,946 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-03 16:42:25,273 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-05-03 16:42:25,552 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-05-03 16:42:25,753 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 16:42:25,966 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-05-03 16:42:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:42:25,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207123078] [2021-05-03 16:42:25,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492920723] [2021-05-03 16:42:25,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:42:25,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:42:25,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:42:25,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:42:25,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:42:26,530 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:42:26,779 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 16:42:27,015 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:42:27,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:27,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:42:27,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:27,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:27,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:42:27,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:27,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:27,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:42:27,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:27,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:27,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:42:27,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:27,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:27,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:42:27,503 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:27,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:27,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:42:27,528 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:27,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:27,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,547 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:42:27,551 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:27,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:27,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:42:27,574 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:27,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:27,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:42:27,597 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:27,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:27,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,616 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 33 treesize of output 19 [2021-05-03 16:42:27,620 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:27,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:27,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,641 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 28 treesize of output 16 [2021-05-03 16:42:27,645 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:27,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:27,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:42:27,667 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:27,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:27,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:42:27,691 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:27,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:27,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:42:27,713 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:27,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:27,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:27,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-05-03 16:42:27,729 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:28,058 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 16:42:28,059 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-05-03 16:42:28,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:42:28,063 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-05-03 16:42:28,241 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-05-03 16:42:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:42:28,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:42:28,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:42:28,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976861115] [2021-05-03 16:42:28,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:42:28,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:42:28,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:42:28,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:42:28,281 INFO L87 Difference]: Start difference. First operand 1832 states and 6224 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) [2021-05-03 16:42:28,648 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2021-05-03 16:42:29,326 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-05-03 16:42:29,497 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:42:29,779 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 35 [2021-05-03 16:42:30,456 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-05-03 16:42:31,131 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-05-03 16:42:31,734 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-05-03 16:42:31,954 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:42:32,604 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-05-03 16:42:33,190 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-05-03 16:42:33,671 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-05-03 16:42:34,561 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-05-03 16:42:34,787 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:42:35,373 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-05-03 16:42:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:42:36,044 INFO L93 Difference]: Finished difference Result 2398 states and 7951 transitions. [2021-05-03 16:42:36,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 16:42:36,048 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 [2021-05-03 16:42:36,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:42:36,051 INFO L225 Difference]: With dead ends: 2398 [2021-05-03 16:42:36,051 INFO L226 Difference]: Without dead ends: 2383 [2021-05-03 16:42:36,052 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 8155.5ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 16:42:36,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-05-03 16:42:36,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 1847. [2021-05-03 16:42:36,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 3.397074756229686) internal successors, (6271), 1846 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:42:36,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 6271 transitions. [2021-05-03 16:42:36,079 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 6271 transitions. Word has length 26 [2021-05-03 16:42:36,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:42:36,079 INFO L480 AbstractCegarLoop]: Abstraction has 1847 states and 6271 transitions. [2021-05-03 16:42:36,079 INFO L481 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) [2021-05-03 16:42:36,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 6271 transitions. [2021-05-03 16:42:36,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:42:36,082 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:42:36,082 INFO L551 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] [2021-05-03 16:42:36,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2194,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:42:36,283 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:42:36,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:42:36,283 INFO L82 PathProgramCache]: Analyzing trace with hash 224636922, now seen corresponding path program 29 times [2021-05-03 16:42:36,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:42:36,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300335020] [2021-05-03 16:42:36,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:42:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:42:36,806 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 16:42:37,114 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-05-03 16:42:37,343 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-03 16:42:37,552 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-05-03 16:42:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:42:37,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300335020] [2021-05-03 16:42:37,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578288330] [2021-05-03 16:42:37,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:42:37,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:42:37,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:42:37,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:42:37,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:42:38,239 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:42:38,471 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:42:38,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:38,609 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:42:38,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:42:38,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:38,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:38,644 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:42:38,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:42:38,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:38,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:38,680 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:42:38,681 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 33 treesize of output 19 [2021-05-03 16:42:38,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:38,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:38,734 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:42:38,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:42:38,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:38,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:38,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:38,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:42:38,790 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:38,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:38,841 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:42:38,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:42:38,847 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:38,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:38,879 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:42:38,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:42:38,883 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:38,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:38,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:38,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:42:38,938 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:38,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:38,973 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:42:38,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:42:38,978 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:38,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:39,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:39,026 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 16 treesize of output 18 [2021-05-03 16:42:39,043 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:39,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:39,079 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:42:39,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-05-03 16:42:39,083 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:39,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:39,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:39,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-05-03 16:42:39,140 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:39,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:39,188 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:42:39,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:42:39,193 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:39,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:39,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:39,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:42:39,253 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:39,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:39,285 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:42:39,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:42:39,288 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:39,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:39,308 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:42:39,308 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 31 treesize of output 19 [2021-05-03 16:42:39,311 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:39,632 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:42:39,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:39,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:42:39,636 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-05-03 16:42:40,030 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:42:40,371 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-05-03 16:42:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:42:40,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:42:40,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:42:40,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920912413] [2021-05-03 16:42:40,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:42:40,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:42:40,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:42:40,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:42:40,431 INFO L87 Difference]: Start difference. First operand 1847 states and 6271 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) [2021-05-03 16:42:40,905 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2021-05-03 16:42:41,803 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-05-03 16:42:42,198 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 16:42:42,545 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 30 [2021-05-03 16:42:43,616 WARN L205 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 42 [2021-05-03 16:42:43,807 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:42:44,665 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-05-03 16:42:45,353 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-05-03 16:42:46,347 WARN L205 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-05-03 16:42:47,139 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-05-03 16:42:48,039 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:42:48,739 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-03 16:42:49,829 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-05-03 16:42:50,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:42:50,283 INFO L93 Difference]: Finished difference Result 2710 states and 8888 transitions. [2021-05-03 16:42:50,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:42:50,287 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 [2021-05-03 16:42:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:42:50,291 INFO L225 Difference]: With dead ends: 2710 [2021-05-03 16:42:50,291 INFO L226 Difference]: Without dead ends: 2680 [2021-05-03 16:42:50,300 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 10460.1ms TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:42:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-05-03 16:42:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 1853. [2021-05-03 16:42:50,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 3.39902807775378) internal successors, (6295), 1852 states have internal predecessors, (6295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:42:50,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 6295 transitions. [2021-05-03 16:42:50,328 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 6295 transitions. Word has length 26 [2021-05-03 16:42:50,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:42:50,328 INFO L480 AbstractCegarLoop]: Abstraction has 1853 states and 6295 transitions. [2021-05-03 16:42:50,328 INFO L481 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) [2021-05-03 16:42:50,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 6295 transitions. [2021-05-03 16:42:50,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:42:50,331 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:42:50,331 INFO L551 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] [2021-05-03 16:42:50,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2226 [2021-05-03 16:42:50,542 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:42:50,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:42:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1531090714, now seen corresponding path program 30 times [2021-05-03 16:42:50,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:42:50,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854452609] [2021-05-03 16:42:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:42:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:42:51,113 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-05-03 16:42:51,415 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-05-03 16:42:51,673 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-03 16:42:51,903 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-05-03 16:42:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:42:52,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854452609] [2021-05-03 16:42:52,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61187490] [2021-05-03 16:42:52,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:42:52,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:42:52,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:42:52,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:42:52,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:42:52,600 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:42:52,837 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:42:52,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:52,967 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:42:52,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:42:52,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:52,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:53,004 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:42:53,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:42:53,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:53,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:53,041 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:42:53,042 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 33 treesize of output 19 [2021-05-03 16:42:53,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:53,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:53,098 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:42:53,098 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 [2021-05-03 16:42:53,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:53,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:53,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:53,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:42:53,150 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:53,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:53,191 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:42:53,191 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 [2021-05-03 16:42:53,196 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:53,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:53,222 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:42:53,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:42:53,225 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:53,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:53,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:53,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:42:53,266 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:53,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:53,292 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:42:53,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:42:53,295 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:53,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:53,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:53,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:42:53,343 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:53,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:53,379 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:42:53,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-05-03 16:42:53,383 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:53,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:53,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:53,436 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 33 treesize of output 27 [2021-05-03 16:42:53,446 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:53,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:53,502 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:42:53,502 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 28 treesize of output 20 [2021-05-03 16:42:53,508 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:53,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:53,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:53,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:42:53,577 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:53,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:53,612 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:42:53,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:42:53,616 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:53,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:53,638 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:42:53,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:42:53,642 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:53,992 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:42:53,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:53,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:42:53,997 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-05-03 16:42:54,429 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:42:54,816 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-05-03 16:42:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:42:54,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:42:54,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:42:54,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854061477] [2021-05-03 16:42:54,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:42:54,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:42:54,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:42:54,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:42:54,880 INFO L87 Difference]: Start difference. First operand 1853 states and 6295 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) [2021-05-03 16:42:55,339 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 28 [2021-05-03 16:42:56,101 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-05-03 16:42:56,544 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-05-03 16:42:56,890 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 30 [2021-05-03 16:42:57,272 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:42:58,680 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2021-05-03 16:42:58,885 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:42:59,331 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-05-03 16:42:59,894 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2021-05-03 16:43:00,555 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-05-03 16:43:01,490 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2021-05-03 16:43:02,932 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-05-03 16:43:03,881 WARN L205 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-05-03 16:43:04,850 WARN L205 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-05-03 16:43:05,317 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:43:06,439 WARN L205 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-03 16:43:07,879 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2021-05-03 16:43:08,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:43:08,387 INFO L93 Difference]: Finished difference Result 2506 states and 8354 transitions. [2021-05-03 16:43:08,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:43:08,390 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 [2021-05-03 16:43:08,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:43:08,394 INFO L225 Difference]: With dead ends: 2506 [2021-05-03 16:43:08,395 INFO L226 Difference]: Without dead ends: 2491 [2021-05-03 16:43:08,395 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 13640.0ms TimeCoverageRelationStatistics Valid=268, Invalid=1292, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:43:08,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-05-03 16:43:08,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1849. [2021-05-03 16:43:08,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.3955627705627704) internal successors, (6275), 1848 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:43:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6275 transitions. [2021-05-03 16:43:08,427 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6275 transitions. Word has length 26 [2021-05-03 16:43:08,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:43:08,428 INFO L480 AbstractCegarLoop]: Abstraction has 1849 states and 6275 transitions. [2021-05-03 16:43:08,428 INFO L481 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) [2021-05-03 16:43:08,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6275 transitions. [2021-05-03 16:43:08,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:43:08,431 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:43:08,431 INFO L551 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] [2021-05-03 16:43:08,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2243 [2021-05-03 16:43:08,651 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:43:08,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:43:08,651 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 31 times [2021-05-03 16:43:08,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:43:08,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967460995] [2021-05-03 16:43:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:43:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:43:09,163 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 16:43:09,338 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-05-03 16:43:09,556 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-05-03 16:43:09,759 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-05-03 16:43:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:43:09,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967460995] [2021-05-03 16:43:09,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189977890] [2021-05-03 16:43:09,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:43:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:43:09,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:43:09,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:43:10,473 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:43:10,734 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:43:11,021 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:43:11,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:11,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:43:11,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:11,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:11,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,546 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 [2021-05-03 16:43:11,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:11,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:11,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:43:11,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:11,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:11,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,603 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 [2021-05-03 16:43:11,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:11,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:11,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:43:11,637 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:11,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:11,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:43:11,666 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:11,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:11,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:43:11,695 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:11,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:11,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-05-03 16:43:11,724 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:11,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:11,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:43:11,753 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:11,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:11,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:43:11,786 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:11,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:11,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:43:11,815 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:11,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:11,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:43:11,845 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:11,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:11,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:43:11,868 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:11,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:11,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,894 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 31 treesize of output 19 [2021-05-03 16:43:11,898 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:11,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:11,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:11,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:43:11,915 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:12,291 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 16:43:12,292 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-05-03 16:43:12,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:43:12,297 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-05-03 16:43:12,498 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-05-03 16:43:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:43:12,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:43:12,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 16:43:12,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887120093] [2021-05-03 16:43:12,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:43:12,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:43:12,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:43:12,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:43:12,546 INFO L87 Difference]: Start difference. First operand 1849 states and 6275 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) [2021-05-03 16:43:12,759 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-05-03 16:43:13,576 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:43:14,110 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:43:14,445 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:43:14,844 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:43:14,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:43:14,901 INFO L93 Difference]: Finished difference Result 2303 states and 7667 transitions. [2021-05-03 16:43:14,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:43:14,905 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 [2021-05-03 16:43:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:43:14,909 INFO L225 Difference]: With dead ends: 2303 [2021-05-03 16:43:14,909 INFO L226 Difference]: Without dead ends: 2282 [2021-05-03 16:43:14,909 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3643.5ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:43:14,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2021-05-03 16:43:14,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1864. [2021-05-03 16:43:14,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 3.3988191089640365) internal successors, (6332), 1863 states have internal predecessors, (6332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:43:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 6332 transitions. [2021-05-03 16:43:14,935 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 6332 transitions. Word has length 26 [2021-05-03 16:43:14,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:43:14,935 INFO L480 AbstractCegarLoop]: Abstraction has 1864 states and 6332 transitions. [2021-05-03 16:43:14,935 INFO L481 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) [2021-05-03 16:43:14,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 6332 transitions. [2021-05-03 16:43:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:43:14,937 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:43:14,937 INFO L551 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] [2021-05-03 16:43:15,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2260 [2021-05-03 16:43:15,138 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:43:15,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:43:15,138 INFO L82 PathProgramCache]: Analyzing trace with hash 495653818, now seen corresponding path program 32 times [2021-05-03 16:43:15,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:43:15,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209458132] [2021-05-03 16:43:15,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:43:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:43:15,807 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-05-03 16:43:16,041 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-05-03 16:43:16,426 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 16:43:16,776 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 16:43:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:43:16,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209458132] [2021-05-03 16:43:16,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528889078] [2021-05-03 16:43:16,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:43:16,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:43:16,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:43:16,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 16:43:16,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:43:17,529 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 16:43:17,938 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:43:18,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:18,717 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:43:18,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:43:18,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:18,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:18,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:18,810 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 16 treesize of output 26 [2021-05-03 16:43:18,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:19,594 WARN L205 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 16:43:19,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:19,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:19,713 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:43:19,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:43:19,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:19,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:19,810 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:43:19,810 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 21 treesize of output 21 [2021-05-03 16:43:19,817 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:20,587 WARN L205 SmtUtils]: Spent 770.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-05-03 16:43:20,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:20,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:20,703 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:43:20,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-05-03 16:43:20,708 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:20,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:20,794 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:43:20,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:43:20,800 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:21,535 WARN L205 SmtUtils]: Spent 734.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-05-03 16:43:21,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:21,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:21,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:21,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-05-03 16:43:21,638 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:21,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:21,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:21,710 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 16:43:21,738 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:23,148 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-05-03 16:43:23,149 INFO L628 ElimStorePlain]: treesize reduction 17, result has 93.7 percent of original size [2021-05-03 16:43:23,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:43:23,202 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:357, output treesize:292 [2021-05-03 16:43:24,424 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 16:43:24,840 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-05-03 16:43:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:43:24,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:43:24,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-03 16:43:24,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504059075] [2021-05-03 16:43:24,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:43:24,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:43:24,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:43:24,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:43:24,919 INFO L87 Difference]: Start difference. First operand 1864 states and 6332 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) [2021-05-03 16:43:25,418 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:43:25,878 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2021-05-03 16:43:26,333 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-05-03 16:43:27,847 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2021-05-03 16:43:28,469 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-05-03 16:43:29,604 WARN L205 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-05-03 16:43:30,394 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 16:43:31,293 WARN L205 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-05-03 16:43:32,588 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2021-05-03 16:43:32,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:43:32,807 INFO L93 Difference]: Finished difference Result 2295 states and 7632 transitions. [2021-05-03 16:43:32,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:43:32,812 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 [2021-05-03 16:43:32,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:43:32,815 INFO L225 Difference]: With dead ends: 2295 [2021-05-03 16:43:32,816 INFO L226 Difference]: Without dead ends: 2266 [2021-05-03 16:43:32,816 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 10376.4ms TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:43:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-05-03 16:43:32,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 1849. [2021-05-03 16:43:32,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.3955627705627704) internal successors, (6275), 1848 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:43:32,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6275 transitions. [2021-05-03 16:43:32,839 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6275 transitions. Word has length 26 [2021-05-03 16:43:32,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:43:32,839 INFO L480 AbstractCegarLoop]: Abstraction has 1849 states and 6275 transitions. [2021-05-03 16:43:32,839 INFO L481 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) [2021-05-03 16:43:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6275 transitions. [2021-05-03 16:43:32,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:43:32,841 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:43:32,842 INFO L551 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] [2021-05-03 16:43:33,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2294,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:43:33,043 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:43:33,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:43:33,043 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 33 times [2021-05-03 16:43:33,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:43:33,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203373421] [2021-05-03 16:43:33,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:43:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:43:33,659 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-05-03 16:43:33,889 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-05-03 16:43:34,058 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-05-03 16:43:34,265 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-05-03 16:43:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:43:34,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203373421] [2021-05-03 16:43:34,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252271234] [2021-05-03 16:43:34,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:43:34,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:43:34,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:43:34,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 16:43:34,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:43:35,100 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 16:43:35,467 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:43:36,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:36,312 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:43:36,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:43:36,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:36,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:36,425 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:43:36,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:43:36,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:37,192 WARN L205 SmtUtils]: Spent 749.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-03 16:43:37,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:37,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:37,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:37,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:43:37,317 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:37,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:37,421 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:43:37,422 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:43:37,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:38,165 WARN L205 SmtUtils]: Spent 734.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-03 16:43:38,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:38,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:38,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:38,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:43:38,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:38,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:38,390 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:43:38,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:43:38,398 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:39,699 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-05-03 16:43:39,700 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-05-03 16:43:39,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:39,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:39,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-05-03 16:43:39,811 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:39,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:39,908 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:43:39,909 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-05-03 16:43:39,914 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:41,181 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-05-03 16:43:41,182 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-05-03 16:43:41,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:43:41,230 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-05-03 16:43:42,251 WARN L205 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-05-03 16:43:42,642 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-05-03 16:43:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:43:42,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:43:42,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-03 16:43:42,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643872438] [2021-05-03 16:43:42,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:43:42,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:43:42,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:43:42,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:43:42,736 INFO L87 Difference]: Start difference. First operand 1849 states and 6275 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) [2021-05-03 16:43:43,340 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-05-03 16:43:43,776 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-03 16:43:44,321 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:43:44,799 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-05-03 16:43:45,408 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:43:46,264 WARN L205 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-03 16:43:47,222 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-05-03 16:43:47,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:43:47,439 INFO L93 Difference]: Finished difference Result 2056 states and 6874 transitions. [2021-05-03 16:43:47,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:43:47,443 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 [2021-05-03 16:43:47,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:43:47,446 INFO L225 Difference]: With dead ends: 2056 [2021-05-03 16:43:47,446 INFO L226 Difference]: Without dead ends: 2031 [2021-05-03 16:43:47,446 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 6765.7ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:43:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-05-03 16:43:47,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1831. [2021-05-03 16:43:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 3.3994535519125684) internal successors, (6221), 1830 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:43:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 6221 transitions. [2021-05-03 16:43:47,468 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 6221 transitions. Word has length 26 [2021-05-03 16:43:47,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:43:47,468 INFO L480 AbstractCegarLoop]: Abstraction has 1831 states and 6221 transitions. [2021-05-03 16:43:47,469 INFO L481 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) [2021-05-03 16:43:47,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 6221 transitions. [2021-05-03 16:43:47,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:43:47,471 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:43:47,471 INFO L551 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] [2021-05-03 16:43:47,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2339,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:43:47,671 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:43:47,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:43:47,672 INFO L82 PathProgramCache]: Analyzing trace with hash 939333122, now seen corresponding path program 34 times [2021-05-03 16:43:47,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:43:47,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218569343] [2021-05-03 16:43:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:43:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:43:48,405 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-05-03 16:43:48,692 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:43:48,872 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 16:43:49,034 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-05-03 16:43:49,188 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-05-03 16:43:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:43:49,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218569343] [2021-05-03 16:43:49,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477845214] [2021-05-03 16:43:49,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:43:49,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:43:49,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:43:49,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 16:43:49,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:43:49,919 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:43:50,897 WARN L205 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-05-03 16:43:51,367 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_261], 3=[v_prenex_260, v_prenex_262]} [2021-05-03 16:43:51,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:51,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:51,426 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 33 treesize of output 27 [2021-05-03 16:43:51,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:51,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:51,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:51,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:43:51,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:52,170 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-03 16:43:52,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:52,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:52,232 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:43:52,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:43:52,241 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:52,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:52,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:52,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:43:52,291 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:52,961 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 16:43:52,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:52,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:52,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:53,026 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-05-03 16:43:53,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:43:53,034 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:53,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:53,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:53,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:53,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:43:53,096 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:53,721 WARN L205 SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-03 16:43:53,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:53,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:53,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:53,790 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-05-03 16:43:53,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-05-03 16:43:53,797 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:53,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:53,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:53,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:53,843 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 30 treesize of output 26 [2021-05-03 16:43:53,864 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:54,329 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 16:43:54,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:54,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:43:54,346 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:357, output treesize:194 [2021-05-03 16:43:54,903 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:43:55,350 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-05-03 16:43:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:43:55,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:43:55,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 16:43:55,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821868225] [2021-05-03 16:43:55,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:43:55,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:43:55,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:43:55,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:43:55,453 INFO L87 Difference]: Start difference. First operand 1831 states and 6221 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) [2021-05-03 16:43:56,675 WARN L205 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-05-03 16:43:57,781 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-05-03 16:43:58,357 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2021-05-03 16:43:58,828 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 16:43:59,483 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 16:44:00,032 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 16:44:00,984 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:44:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:44:01,255 INFO L93 Difference]: Finished difference Result 2461 states and 8160 transitions. [2021-05-03 16:44:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:44:01,260 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 [2021-05-03 16:44:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:44:01,264 INFO L225 Difference]: With dead ends: 2461 [2021-05-03 16:44:01,264 INFO L226 Difference]: Without dead ends: 2436 [2021-05-03 16:44:01,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 7934.4ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:44:01,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-05-03 16:44:01,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1819. [2021-05-03 16:44:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 3.3987898789878987) internal successors, (6179), 1818 states have internal predecessors, (6179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:44:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 6179 transitions. [2021-05-03 16:44:01,288 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 6179 transitions. Word has length 26 [2021-05-03 16:44:01,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:44:01,289 INFO L480 AbstractCegarLoop]: Abstraction has 1819 states and 6179 transitions. [2021-05-03 16:44:01,289 INFO L481 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) [2021-05-03 16:44:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 6179 transitions. [2021-05-03 16:44:01,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:44:01,291 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:44:01,291 INFO L551 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] [2021-05-03 16:44:01,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2395,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:01,512 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:44:01,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:44:01,513 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 35 times [2021-05-03 16:44:01,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:44:01,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858138101] [2021-05-03 16:44:01,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:44:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:44:02,025 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-05-03 16:44:02,315 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-05-03 16:44:02,658 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-05-03 16:44:02,982 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-05-03 16:44:03,185 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-05-03 16:44:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:44:03,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858138101] [2021-05-03 16:44:03,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266932008] [2021-05-03 16:44:03,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:03,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:44:03,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:44:03,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:44:03,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:44:03,824 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:44:04,137 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 16:44:04,387 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 16:44:04,712 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:44:05,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:05,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:44:05,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:05,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:05,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:44:05,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:05,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:05,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:44:05,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:05,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:05,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:44:05,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:05,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:05,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:44:05,351 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:05,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:05,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:44:05,380 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:05,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:05,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:44:05,418 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:05,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:05,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:44:05,457 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:05,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:05,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-05-03 16:44:05,487 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:05,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:05,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,512 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 28 treesize of output 16 [2021-05-03 16:44:05,518 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:05,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:05,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:44:05,547 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:05,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:05,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:44:05,576 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:05,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:05,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,599 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:44:05,604 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:05,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:05,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,622 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 28 treesize of output 16 [2021-05-03 16:44:05,628 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:05,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:05,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:05,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:44:05,648 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:06,095 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 16:44:06,096 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-05-03 16:44:06,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:44:06,101 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-05-03 16:44:06,334 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-05-03 16:44:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:44:06,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:44:06,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:44:06,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57820667] [2021-05-03 16:44:06,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:44:06,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:44:06,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:44:06,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:44:06,392 INFO L87 Difference]: Start difference. First operand 1819 states and 6179 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) [2021-05-03 16:44:06,704 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-05-03 16:44:07,278 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:44:08,089 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-05-03 16:44:08,597 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-05-03 16:44:09,552 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-05-03 16:44:10,425 WARN L205 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-05-03 16:44:10,953 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 16:44:11,259 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:44:11,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:44:11,398 INFO L93 Difference]: Finished difference Result 2320 states and 7724 transitions. [2021-05-03 16:44:11,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:44:11,403 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 [2021-05-03 16:44:11,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:44:11,407 INFO L225 Difference]: With dead ends: 2320 [2021-05-03 16:44:11,407 INFO L226 Difference]: Without dead ends: 2305 [2021-05-03 16:44:11,407 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 6587.6ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:44:11,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-05-03 16:44:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1855. [2021-05-03 16:44:11,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1854 states have (on average 3.3910463861920173) internal successors, (6287), 1854 states have internal predecessors, (6287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:44:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 6287 transitions. [2021-05-03 16:44:11,438 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 6287 transitions. Word has length 26 [2021-05-03 16:44:11,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:44:11,438 INFO L480 AbstractCegarLoop]: Abstraction has 1855 states and 6287 transitions. [2021-05-03 16:44:11,438 INFO L481 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) [2021-05-03 16:44:11,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 6287 transitions. [2021-05-03 16:44:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:44:11,441 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:44:11,441 INFO L551 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] [2021-05-03 16:44:11,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2427,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:11,642 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:44:11,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:44:11,642 INFO L82 PathProgramCache]: Analyzing trace with hash 137480694, now seen corresponding path program 36 times [2021-05-03 16:44:11,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:44:11,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550371337] [2021-05-03 16:44:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:44:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:44:12,248 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-03 16:44:12,581 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-03 16:44:12,791 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 16:44:12,976 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-05-03 16:44:13,145 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2021-05-03 16:44:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:44:13,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550371337] [2021-05-03 16:44:13,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310861561] [2021-05-03 16:44:13,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:13,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:44:13,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:44:13,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 16:44:13,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:44:13,648 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 16:44:13,840 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 16:44:14,134 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:44:14,753 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:44:14,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:44:14,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:14,898 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:14,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:44:14,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:14,954 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:44:14,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:44:14,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:15,005 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:44:15,005 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:44:15,011 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:15,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:15,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:44:15,108 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:15,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:15,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-05-03 16:44:15,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:15,260 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:44:15,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:44:15,265 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:15,315 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:44:15,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-05-03 16:44:15,320 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:15,369 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:44:15,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-05-03 16:44:15,374 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:15,499 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:15,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:44:15,519 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:15,624 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:44:15,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:44:15,631 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:15,676 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:44:15,677 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 [2021-05-03 16:44:15,681 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:15,802 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:15,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:44:15,822 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:15,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:15,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:44:15,924 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:15,967 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:44:15,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:44:15,972 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:15,997 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:44:15,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:44:16,003 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:16,684 WARN L205 SmtUtils]: Spent 680.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:44:16,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:16,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:44:16,723 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:769, output treesize:376 [2021-05-03 16:44:18,004 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-03 16:44:19,192 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-05-03 16:44:19,720 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-05-03 16:44:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:44:19,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:44:19,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-05-03 16:44:19,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628974167] [2021-05-03 16:44:19,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:44:19,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:44:19,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:44:19,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:44:19,765 INFO L87 Difference]: Start difference. First operand 1855 states and 6287 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) [2021-05-03 16:44:20,105 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-05-03 16:44:20,590 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-05-03 16:44:20,937 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-05-03 16:44:22,567 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-05-03 16:44:23,320 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-03 16:44:23,856 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-05-03 16:44:24,880 WARN L205 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-05-03 16:44:25,162 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:44:26,022 WARN L205 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-05-03 16:44:27,829 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-05-03 16:44:29,278 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-05-03 16:44:29,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:44:29,634 INFO L93 Difference]: Finished difference Result 2577 states and 8546 transitions. [2021-05-03 16:44:29,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:44:29,638 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 [2021-05-03 16:44:29,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:44:29,642 INFO L225 Difference]: With dead ends: 2577 [2021-05-03 16:44:29,643 INFO L226 Difference]: Without dead ends: 2562 [2021-05-03 16:44:29,643 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 13247.9ms TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:44:29,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-05-03 16:44:29,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1865. [2021-05-03 16:44:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 3.3953862660944205) internal successors, (6329), 1864 states have internal predecessors, (6329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:44:29,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 6329 transitions. [2021-05-03 16:44:29,669 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 6329 transitions. Word has length 26 [2021-05-03 16:44:29,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:44:29,669 INFO L480 AbstractCegarLoop]: Abstraction has 1865 states and 6329 transitions. [2021-05-03 16:44:29,669 INFO L481 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) [2021-05-03 16:44:29,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 6329 transitions. [2021-05-03 16:44:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:44:29,671 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:44:29,672 INFO L551 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] [2021-05-03 16:44:29,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2461 [2021-05-03 16:44:29,872 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:44:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:44:29,872 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 37 times [2021-05-03 16:44:29,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:44:29,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820159483] [2021-05-03 16:44:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:44:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:44:30,365 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 16:44:30,604 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-05-03 16:44:30,823 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-05-03 16:44:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:44:30,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820159483] [2021-05-03 16:44:30,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823944733] [2021-05-03 16:44:30,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:44:31,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:44:31,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:44:31,626 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:44:31,834 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:44:32,226 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:44:32,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:32,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:32,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:32,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:44:32,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:32,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:32,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:32,529 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 28 treesize of output 16 [2021-05-03 16:44:32,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:33,207 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-05-03 16:44:33,209 INFO L628 ElimStorePlain]: treesize reduction 100, result has 55.6 percent of original size [2021-05-03 16:44:33,209 INFO L518 ElimStorePlain]: Eliminatee v_prenex_263 vanished before elimination [2021-05-03 16:44:33,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:33,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:33,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:44:33,232 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:33,538 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:44:33,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:33,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:33,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:33,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:33,564 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 28 treesize of output 16 [2021-05-03 16:44:33,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:33,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:33,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:33,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:44:33,591 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:33,819 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 16:44:33,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:33,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:44:33,828 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:264, output treesize:51 [2021-05-03 16:44:34,068 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-05-03 16:44:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:44:34,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:44:34,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:44:34,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726100345] [2021-05-03 16:44:34,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:44:34,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:44:34,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:44:34,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:44:34,168 INFO L87 Difference]: Start difference. First operand 1865 states and 6329 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) [2021-05-03 16:44:34,496 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-05-03 16:44:34,852 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-05-03 16:44:35,529 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-05-03 16:44:35,824 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 16:44:36,155 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:44:36,696 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-05-03 16:44:37,083 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-05-03 16:44:38,386 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-05-03 16:44:38,845 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:44:39,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:44:39,039 INFO L93 Difference]: Finished difference Result 2506 states and 8276 transitions. [2021-05-03 16:44:39,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:44:39,043 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 [2021-05-03 16:44:39,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:44:39,048 INFO L225 Difference]: With dead ends: 2506 [2021-05-03 16:44:39,048 INFO L226 Difference]: Without dead ends: 2476 [2021-05-03 16:44:39,048 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 5571.3ms TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:44:39,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-05-03 16:44:39,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1867. [2021-05-03 16:44:39,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.397106109324759) internal successors, (6339), 1866 states have internal predecessors, (6339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:44:39,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6339 transitions. [2021-05-03 16:44:39,077 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6339 transitions. Word has length 26 [2021-05-03 16:44:39,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:44:39,077 INFO L480 AbstractCegarLoop]: Abstraction has 1867 states and 6339 transitions. [2021-05-03 16:44:39,077 INFO L481 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) [2021-05-03 16:44:39,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6339 transitions. [2021-05-03 16:44:39,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:44:39,081 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:44:39,081 INFO L551 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] [2021-05-03 16:44:39,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2513,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:39,285 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:44:39,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:44:39,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 38 times [2021-05-03 16:44:39,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:44:39,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640814777] [2021-05-03 16:44:39,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:44:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:44:39,583 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-05-03 16:44:39,751 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-05-03 16:44:39,998 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-05-03 16:44:40,494 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-03 16:44:40,949 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-05-03 16:44:41,112 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2021-05-03 16:44:41,259 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2021-05-03 16:44:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:44:41,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640814777] [2021-05-03 16:44:41,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098173631] [2021-05-03 16:44:41,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:41,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:44:41,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:44:41,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 16:44:41,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:44:42,239 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-05-03 16:44:42,669 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 16:44:43,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:43,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:43,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:44:43,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:43,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:43,833 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:44:43,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:44:43,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:45,254 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-05-03 16:44:45,255 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-05-03 16:44:45,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:45,391 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:45,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-05-03 16:44:45,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:45,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:45,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:45,475 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 35 [2021-05-03 16:44:45,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:47,034 WARN L205 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-05-03 16:44:47,035 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-05-03 16:44:47,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:47,154 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:44:47,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:44:47,163 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:47,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:47,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:47,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:44:47,272 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:48,049 WARN L205 SmtUtils]: Spent 775.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-03 16:44:48,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:48,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:48,195 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:48,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:44:48,203 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:48,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:48,321 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:48,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:44:48,343 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:49,062 WARN L205 SmtUtils]: Spent 718.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-03 16:44:49,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:49,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:44:49,125 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:253 [2021-05-03 16:44:50,195 WARN L205 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-05-03 16:44:50,647 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-05-03 16:44:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:44:50,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:44:50,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 16:44:50,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085472778] [2021-05-03 16:44:50,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:44:50,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:44:50,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:44:50,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:44:50,748 INFO L87 Difference]: Start difference. First operand 1867 states and 6339 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:44:52,205 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-05-03 16:44:53,818 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-05-03 16:44:54,326 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-05-03 16:44:54,782 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:44:55,431 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-03 16:44:56,356 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:44:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:44:56,515 INFO L93 Difference]: Finished difference Result 2436 states and 8120 transitions. [2021-05-03 16:44:56,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:44:56,519 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:44:56,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:44:56,523 INFO L225 Difference]: With dead ends: 2436 [2021-05-03 16:44:56,523 INFO L226 Difference]: Without dead ends: 2421 [2021-05-03 16:44:56,524 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 8942.3ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:44:56,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2021-05-03 16:44:56,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 1885. [2021-05-03 16:44:56,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.393312101910828) internal successors, (6393), 1884 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:44:56,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6393 transitions. [2021-05-03 16:44:56,550 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6393 transitions. Word has length 26 [2021-05-03 16:44:56,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:44:56,550 INFO L480 AbstractCegarLoop]: Abstraction has 1885 states and 6393 transitions. [2021-05-03 16:44:56,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:44:56,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6393 transitions. [2021-05-03 16:44:56,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:44:56,552 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:44:56,552 INFO L551 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] [2021-05-03 16:44:56,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2524 [2021-05-03 16:44:56,753 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:44:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:44:56,753 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 39 times [2021-05-03 16:44:56,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:44:56,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18008494] [2021-05-03 16:44:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:44:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:44:57,366 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-05-03 16:44:57,596 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:44:57,945 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-05-03 16:44:58,263 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-03 16:44:58,441 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-05-03 16:44:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:44:58,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18008494] [2021-05-03 16:44:58,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501971637] [2021-05-03 16:44:58,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:58,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:44:58,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:44:58,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:44:58,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:44:58,910 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 16:44:59,243 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:45:00,326 WARN L205 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 16:45:01,884 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-05-03 16:45:02,233 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_285], 2=[A, v_prenex_284]} [2021-05-03 16:45:02,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:02,249 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 [2021-05-03 16:45:02,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:02,965 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-05-03 16:45:02,966 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-05-03 16:45:02,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:02,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:02,985 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 28 treesize of output 16 [2021-05-03 16:45:02,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:03,311 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:45:03,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:03,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:03,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:03,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:03,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:45:03,346 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:03,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:03,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:03,362 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 21 treesize of output 13 [2021-05-03 16:45:03,370 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:03,626 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 16:45:03,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:03,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:45:03,635 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-05-03 16:45:03,822 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-05-03 16:45:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:45:03,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:45:03,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 16:45:03,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882616282] [2021-05-03 16:45:03,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:45:03,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:45:03,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:45:03,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:45:03,920 INFO L87 Difference]: Start difference. First operand 1885 states and 6393 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) [2021-05-03 16:45:04,211 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-05-03 16:45:04,357 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 16:45:04,607 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 16:45:05,441 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-05-03 16:45:06,176 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:45:06,414 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:45:06,854 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-05-03 16:45:07,531 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:45:08,814 WARN L205 SmtUtils]: Spent 812.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-03 16:45:10,410 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2021-05-03 16:45:11,178 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-05-03 16:45:11,812 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 16:45:11,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:45:11,928 INFO L93 Difference]: Finished difference Result 2516 states and 8289 transitions. [2021-05-03 16:45:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:45:11,934 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 [2021-05-03 16:45:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:45:11,939 INFO L225 Difference]: With dead ends: 2516 [2021-05-03 16:45:11,939 INFO L226 Difference]: Without dead ends: 2471 [2021-05-03 16:45:11,939 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 10608.1ms TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:45:11,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-05-03 16:45:11,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1925. [2021-05-03 16:45:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1925 states, 1924 states have (on average 3.396049896049896) internal successors, (6534), 1924 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:45:11,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 6534 transitions. [2021-05-03 16:45:11,979 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 6534 transitions. Word has length 26 [2021-05-03 16:45:11,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:45:11,979 INFO L480 AbstractCegarLoop]: Abstraction has 1925 states and 6534 transitions. [2021-05-03 16:45:11,979 INFO L481 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) [2021-05-03 16:45:11,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 6534 transitions. [2021-05-03 16:45:11,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:45:11,982 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:45:11,982 INFO L551 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] [2021-05-03 16:45:12,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2582,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:45:12,205 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:45:12,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:45:12,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1962618678, now seen corresponding path program 40 times [2021-05-03 16:45:12,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:45:12,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736610054] [2021-05-03 16:45:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:45:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:45:12,448 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-05-03 16:45:12,990 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-05-03 16:45:13,239 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:45:13,619 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-05-03 16:45:13,824 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-05-03 16:45:14,008 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-05-03 16:45:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:45:14,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736610054] [2021-05-03 16:45:14,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087304311] [2021-05-03 16:45:14,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:45:14,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:45:14,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:45:14,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 16:45:14,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:45:14,485 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 16:45:14,965 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:45:16,074 WARN L205 SmtUtils]: Spent 710.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-03 16:45:16,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:16,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:16,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:45:16,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:17,052 WARN L205 SmtUtils]: Spent 680.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-03 16:45:17,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:17,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:17,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:17,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:45:17,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:17,781 WARN L205 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-05-03 16:45:17,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:17,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:17,840 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:45:17,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:45:17,848 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:18,486 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-05-03 16:45:18,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:18,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:18,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:18,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-05-03 16:45:18,528 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:19,115 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-03 16:45:19,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:19,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:19,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:19,174 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 33 treesize of output 27 [2021-05-03 16:45:19,188 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:19,827 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-05-03 16:45:19,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:19,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:19,884 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:45:19,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:45:19,893 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:20,542 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 16:45:20,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:20,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:20,606 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:45:20,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:45:20,616 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:21,247 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-05-03 16:45:21,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:21,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:21,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:21,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:45:21,303 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:21,936 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-03 16:45:21,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:21,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:45:21,960 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-05-03 16:45:22,586 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:45:23,067 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-05-03 16:45:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:45:23,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:45:23,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 16:45:23,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781531864] [2021-05-03 16:45:23,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:45:23,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:45:23,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:45:23,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:45:23,180 INFO L87 Difference]: Start difference. First operand 1925 states and 6534 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) [2021-05-03 16:45:23,491 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-05-03 16:45:23,633 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 16:45:23,905 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:45:25,089 WARN L205 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-05-03 16:45:25,480 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-05-03 16:45:26,195 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:45:26,950 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:45:28,134 WARN L205 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-05-03 16:45:30,085 WARN L205 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-05-03 16:45:31,513 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-05-03 16:45:32,705 WARN L205 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-05-03 16:45:33,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:45:33,392 INFO L93 Difference]: Finished difference Result 2715 states and 8950 transitions. [2021-05-03 16:45:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:45:33,398 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 [2021-05-03 16:45:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:45:33,402 INFO L225 Difference]: With dead ends: 2715 [2021-05-03 16:45:33,402 INFO L226 Difference]: Without dead ends: 2685 [2021-05-03 16:45:33,402 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 12086.2ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:45:33,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-05-03 16:45:33,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1914. [2021-05-03 16:45:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.3946680606377417) internal successors, (6494), 1913 states have internal predecessors, (6494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:45:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6494 transitions. [2021-05-03 16:45:33,434 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6494 transitions. Word has length 26 [2021-05-03 16:45:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:45:33,434 INFO L480 AbstractCegarLoop]: Abstraction has 1914 states and 6494 transitions. [2021-05-03 16:45:33,434 INFO L481 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) [2021-05-03 16:45:33,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6494 transitions. [2021-05-03 16:45:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:45:33,436 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:45:33,436 INFO L551 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] [2021-05-03 16:45:33,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2593,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:45:33,637 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:45:33,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:45:33,638 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 41 times [2021-05-03 16:45:33,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:45:33,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304898891] [2021-05-03 16:45:33,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:45:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:45:33,857 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-05-03 16:45:33,982 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-03 16:45:34,109 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-03 16:45:34,594 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-03 16:45:35,016 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 16:45:35,299 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-05-03 16:45:35,568 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2021-05-03 16:45:35,818 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 12 [2021-05-03 16:45:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:45:35,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304898891] [2021-05-03 16:45:35,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149023006] [2021-05-03 16:45:35,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:45:35,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:45:35,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:45:35,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:45:35,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:45:36,430 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 16:45:36,932 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:45:38,022 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-05-03 16:45:38,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:38,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:38,664 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 28 treesize of output 24 [2021-05-03 16:45:38,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:38,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:38,746 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:45:38,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:45:38,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:39,460 WARN L205 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 16:45:39,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:39,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:39,539 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:45:39,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:45:39,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:39,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:39,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:39,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:45:39,626 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:40,352 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-03 16:45:40,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:40,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:40,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:40,419 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 33 treesize of output 27 [2021-05-03 16:45:40,425 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:40,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:40,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:40,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:45:40,481 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:41,162 WARN L205 SmtUtils]: Spent 680.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 16:45:41,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:41,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:41,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:41,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:45:41,243 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:41,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:41,301 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:45:41,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:45:41,311 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:41,974 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 16:45:41,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:41,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:45:41,997 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:333, output treesize:174 [2021-05-03 16:45:42,579 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:45:43,059 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-05-03 16:45:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:45:43,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:45:43,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 16:45:43,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590140519] [2021-05-03 16:45:43,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:45:43,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:45:43,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:45:43,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:45:43,184 INFO L87 Difference]: Start difference. First operand 1914 states and 6494 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) [2021-05-03 16:45:43,996 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2021-05-03 16:45:44,544 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:45:44,977 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 16:45:45,613 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:45:46,174 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-03 16:45:47,142 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:45:47,965 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-05-03 16:45:48,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:45:48,239 INFO L93 Difference]: Finished difference Result 2483 states and 8261 transitions. [2021-05-03 16:45:48,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:45:48,249 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 [2021-05-03 16:45:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:45:48,253 INFO L225 Difference]: With dead ends: 2483 [2021-05-03 16:45:48,253 INFO L226 Difference]: Without dead ends: 2458 [2021-05-03 16:45:48,253 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 8417.8ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:45:48,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-05-03 16:45:48,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 1918. [2021-05-03 16:45:48,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.394887845592071) internal successors, (6508), 1917 states have internal predecessors, (6508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:45:48,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 6508 transitions. [2021-05-03 16:45:48,281 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 6508 transitions. Word has length 26 [2021-05-03 16:45:48,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:45:48,281 INFO L480 AbstractCegarLoop]: Abstraction has 1918 states and 6508 transitions. [2021-05-03 16:45:48,281 INFO L481 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) [2021-05-03 16:45:48,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 6508 transitions. [2021-05-03 16:45:48,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:45:48,283 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:45:48,283 INFO L551 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] [2021-05-03 16:45:48,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2610 [2021-05-03 16:45:48,484 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:45:48,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:45:48,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 42 times [2021-05-03 16:45:48,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:45:48,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130739712] [2021-05-03 16:45:48,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:45:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:45:48,783 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-03 16:45:49,269 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-05-03 16:45:49,764 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-03 16:45:50,075 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-03 16:45:50,323 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2021-05-03 16:45:50,503 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2021-05-03 16:45:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:45:50,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130739712] [2021-05-03 16:45:50,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472469] [2021-05-03 16:45:50,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:45:50,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:45:50,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:45:50,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:45:50,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:45:51,318 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 16:45:51,661 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:45:51,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:51,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:51,872 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:45:51,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-05-03 16:45:51,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:51,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:51,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:51,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:51,963 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 43 treesize of output 31 [2021-05-03 16:45:51,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:51,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:51,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:52,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-05-03 16:45:52,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:52,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,165 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:45:52,165 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 29 treesize of output 23 [2021-05-03 16:45:52,175 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:52,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,265 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:45:52,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-05-03 16:45:52,278 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:52,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,337 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:45:52,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-05-03 16:45:52,343 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:52,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,410 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:45:52,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-05-03 16:45:52,417 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:52,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,485 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:45:52,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-05-03 16:45:52,493 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:52,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,553 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:45:52,554 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 40 treesize of output 24 [2021-05-03 16:45:52,559 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:52,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,626 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:45:52,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-05-03 16:45:52,633 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:52,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,692 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:45:52,692 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 47 treesize of output 25 [2021-05-03 16:45:52,698 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:52,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:52,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-05-03 16:45:52,811 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:52,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:52,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-05-03 16:45:52,900 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:52,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:52,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:52,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-05-03 16:45:52,995 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:53,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:53,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:53,083 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:45:53,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-05-03 16:45:53,092 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:53,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:53,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:53,132 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:45:53,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-05-03 16:45:53,138 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:53,731 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:45:53,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:53,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:45:53,752 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-05-03 16:45:54,429 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:45:55,033 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-05-03 16:45:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:45:55,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:45:55,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:45:55,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042950648] [2021-05-03 16:45:55,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:45:55,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:45:55,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:45:55,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:45:55,137 INFO L87 Difference]: Start difference. First operand 1918 states and 6508 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) [2021-05-03 16:45:55,563 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-05-03 16:45:56,234 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 16:45:57,066 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-05-03 16:45:57,747 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2021-05-03 16:45:58,819 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-05-03 16:46:00,426 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2021-05-03 16:46:02,451 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-05-03 16:46:03,877 WARN L205 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-05-03 16:46:04,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:46:04,899 INFO L93 Difference]: Finished difference Result 2546 states and 8447 transitions. [2021-05-03 16:46:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:46:04,906 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 [2021-05-03 16:46:04,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:46:04,911 INFO L225 Difference]: With dead ends: 2546 [2021-05-03 16:46:04,911 INFO L226 Difference]: Without dead ends: 2510 [2021-05-03 16:46:04,912 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 10845.1ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:46:04,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2021-05-03 16:46:04,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 1939. [2021-05-03 16:46:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.4004127966976263) internal successors, (6590), 1938 states have internal predecessors, (6590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:46:04,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 6590 transitions. [2021-05-03 16:46:04,992 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 6590 transitions. Word has length 26 [2021-05-03 16:46:04,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:46:04,992 INFO L480 AbstractCegarLoop]: Abstraction has 1939 states and 6590 transitions. [2021-05-03 16:46:04,992 INFO L481 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) [2021-05-03 16:46:04,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 6590 transitions. [2021-05-03 16:46:04,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:46:04,996 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:46:04,996 INFO L551 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] [2021-05-03 16:46:05,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2643 [2021-05-03 16:46:05,212 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:46:05,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:46:05,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 56 times [2021-05-03 16:46:05,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:46:05,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329284389] [2021-05-03 16:46:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:46:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:46:05,502 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-05-03 16:46:06,090 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-05-03 16:46:06,312 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-05-03 16:46:06,568 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-05-03 16:46:06,878 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-05-03 16:46:07,307 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-05-03 16:46:07,783 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-05-03 16:46:08,199 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-05-03 16:46:08,405 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-05-03 16:46:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:46:08,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329284389] [2021-05-03 16:46:08,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208636151] [2021-05-03 16:46:08,411 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 [2021-05-03 16:46:08,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:46:08,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:46:08,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 16:46:08,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:46:09,144 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 16:46:09,539 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:46:09,915 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:46:10,244 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:46:11,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:11,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:46:11,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:11,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:11,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:46:11,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:11,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:11,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,539 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 21 treesize of output 13 [2021-05-03 16:46:11,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:11,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:11,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,583 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 35 treesize of output 16 [2021-05-03 16:46:11,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:11,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:11,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,634 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:46:11,641 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:11,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:11,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:46:11,714 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:11,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:11,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:46:11,772 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:11,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:11,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:46:11,823 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:11,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:11,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:46:11,876 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:11,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:11,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 16 [2021-05-03 16:46:11,931 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:11,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:11,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:11,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:46:11,981 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:11,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:12,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:46:12,027 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:12,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:12,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:46:12,074 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:12,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:12,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:46:12,133 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:12,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:12,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:46:12,193 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:12,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:12,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:46:12,251 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:12,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:12,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 16 [2021-05-03 16:46:12,304 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:12,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:12,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:46:12,362 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:12,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:12,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:46:12,415 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:12,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:12,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:46:12,458 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:12,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:12,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:46:12,508 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:12,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:12,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:46:12,556 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:12,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:12,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:12,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 16 [2021-05-03 16:46:12,581 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:12,833 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-05-03 16:46:12,834 INFO L628 ElimStorePlain]: treesize reduction 64, result has 29.7 percent of original size [2021-05-03 16:46:12,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:46:12,840 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 2 variables, input treesize:956, output treesize:21 [2021-05-03 16:46:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:46:13,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:46:13,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:46:13,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008007378] [2021-05-03 16:46:13,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:46:13,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:46:13,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:46:13,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:46:13,052 INFO L87 Difference]: Start difference. First operand 1939 states and 6590 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:46:13,320 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-05-03 16:46:13,514 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-05-03 16:46:13,719 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 16:46:14,061 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 16:46:14,865 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:46:15,355 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 16:46:15,707 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 16:46:15,939 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:46:16,677 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 16:46:17,183 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:46:17,633 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:46:18,126 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 26 [2021-05-03 16:46:18,527 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-05-03 16:46:18,995 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-03 16:46:19,397 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-05-03 16:46:19,758 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-03 16:46:20,142 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-05-03 16:46:20,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:46:20,201 INFO L93 Difference]: Finished difference Result 2586 states and 8224 transitions. [2021-05-03 16:46:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:46:20,206 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:46:20,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:46:20,211 INFO L225 Difference]: With dead ends: 2586 [2021-05-03 16:46:20,211 INFO L226 Difference]: Without dead ends: 2556 [2021-05-03 16:46:20,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 9727.8ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:46:20,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-05-03 16:46:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1967. [2021-05-03 16:46:20,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.399796541200407) internal successors, (6684), 1966 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:46:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 6684 transitions. [2021-05-03 16:46:20,243 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 6684 transitions. Word has length 26 [2021-05-03 16:46:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:46:20,243 INFO L480 AbstractCegarLoop]: Abstraction has 1967 states and 6684 transitions. [2021-05-03 16:46:20,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:46:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 6684 transitions. [2021-05-03 16:46:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:46:20,246 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:46:20,246 INFO L551 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] [2021-05-03 16:46:20,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2661 [2021-05-03 16:46:20,455 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:46:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:46:20,455 INFO L82 PathProgramCache]: Analyzing trace with hash -401364192, now seen corresponding path program 57 times [2021-05-03 16:46:20,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:46:20,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683605472] [2021-05-03 16:46:20,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:46:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:46:20,915 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-05-03 16:46:21,101 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-05-03 16:46:21,350 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-05-03 16:46:21,620 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-05-03 16:46:22,005 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-05-03 16:46:22,409 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-05-03 16:46:22,788 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-05-03 16:46:22,968 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-05-03 16:46:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:46:22,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683605472] [2021-05-03 16:46:22,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308375316] [2021-05-03 16:46:22,974 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 [2021-05-03 16:46:22,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:46:22,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:46:22,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:46:22,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:46:23,540 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-03 16:46:23,797 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:46:24,307 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:46:25,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:25,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:25,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:25,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:25,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:25,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:25,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-05-03 16:46:25,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:25,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:25,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:25,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:25,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:25,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:25,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:25,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-05-03 16:46:25,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:25,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-05-03 16:46:26,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:26,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:46:26,101 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:26,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,178 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 32 treesize of output 13 [2021-05-03 16:46:26,185 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:26,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,249 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:46:26,255 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:26,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-05-03 16:46:26,359 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:26,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-05-03 16:46:26,419 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:26,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-05-03 16:46:26,483 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:26,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:46:26,542 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:26,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-05-03 16:46:26,618 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:26,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:46:26,682 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:26,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:46:26,757 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:26,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,815 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-05-03 16:46:26,821 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:26,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-05-03 16:46:26,874 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:26,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:26,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:26,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:46:26,902 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:27,128 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-05-03 16:46:27,130 INFO L628 ElimStorePlain]: treesize reduction 32, result has 50.8 percent of original size [2021-05-03 16:46:27,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:46:27,135 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:21 [2021-05-03 16:46:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:46:27,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:46:27,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 16:46:27,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121836305] [2021-05-03 16:46:27,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:46:27,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:46:27,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:46:27,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:46:27,356 INFO L87 Difference]: Start difference. First operand 1967 states and 6684 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:46:27,660 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-05-03 16:46:28,013 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2021-05-03 16:46:28,198 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-05-03 16:46:28,466 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 16:46:28,789 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-05-03 16:46:29,119 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:46:29,436 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 16:46:29,661 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-05-03 16:46:29,980 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:46:30,318 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:46:30,618 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:46:31,239 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-05-03 16:46:31,827 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:46:32,397 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-05-03 16:46:33,041 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-05-03 16:46:33,722 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:46:34,580 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-05-03 16:46:35,112 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:46:35,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:46:35,206 INFO L93 Difference]: Finished difference Result 2698 states and 8750 transitions. [2021-05-03 16:46:35,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:46:35,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:46:35,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:46:35,218 INFO L225 Difference]: With dead ends: 2698 [2021-05-03 16:46:35,218 INFO L226 Difference]: Without dead ends: 2661 [2021-05-03 16:46:35,218 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 9408.0ms TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 16:46:35,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2661 states. [2021-05-03 16:46:35,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2661 to 1989. [2021-05-03 16:46:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 3.397887323943662) internal successors, (6755), 1988 states have internal predecessors, (6755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:46:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 6755 transitions. [2021-05-03 16:46:35,254 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 6755 transitions. Word has length 26 [2021-05-03 16:46:35,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:46:35,254 INFO L480 AbstractCegarLoop]: Abstraction has 1989 states and 6755 transitions. [2021-05-03 16:46:35,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:46:35,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 6755 transitions. [2021-05-03 16:46:35,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:46:35,257 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:46:35,257 INFO L551 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] [2021-05-03 16:46:35,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2730 [2021-05-03 16:46:35,458 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:46:35,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:46:35,458 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 58 times [2021-05-03 16:46:35,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:46:35,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202653786] [2021-05-03 16:46:35,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:46:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:46:35,822 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-05-03 16:46:36,038 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2021-05-03 16:46:36,303 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-05-03 16:46:36,589 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-05-03 16:46:36,979 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-05-03 16:46:37,486 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 16:46:37,738 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-05-03 16:46:37,960 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2021-05-03 16:46:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:46:37,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202653786] [2021-05-03 16:46:37,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627979633] [2021-05-03 16:46:37,966 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 [2021-05-03 16:46:37,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:46:37,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:46:37,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:46:37,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:46:38,556 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-03 16:46:38,824 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:46:39,757 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-05-03 16:46:40,087 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_310, v_prenex_312], 5=[A, v_prenex_314]} [2021-05-03 16:46:40,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:40,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:40,106 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 23 treesize of output 13 [2021-05-03 16:46:40,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:40,859 WARN L205 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-05-03 16:46:40,861 INFO L628 ElimStorePlain]: treesize reduction 142, result has 45.2 percent of original size [2021-05-03 16:46:40,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:40,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:40,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:46:40,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:41,144 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:46:41,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:46:41,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:41,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:41,163 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 29 treesize of output 13 [2021-05-03 16:46:41,169 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:41,420 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:46:41,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:46:41,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:41,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:41,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:41,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-05-03 16:46:41,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:41,659 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 16:46:41,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:46:41,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:46:41,670 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:294, output treesize:31 [2021-05-03 16:46:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:46:41,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:46:41,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-05-03 16:46:41,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452507775] [2021-05-03 16:46:41,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:46:41,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:46:41,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:46:41,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:46:41,850 INFO L87 Difference]: Start difference. First operand 1989 states and 6755 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:46:42,107 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-05-03 16:46:42,280 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-05-03 16:46:42,661 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2021-05-03 16:46:42,851 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-05-03 16:46:43,423 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 29 [2021-05-03 16:46:43,937 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:46:44,203 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:46:44,892 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-03 16:46:45,769 WARN L205 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-05-03 16:46:46,485 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-05-03 16:46:47,058 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-05-03 16:46:47,404 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-05-03 16:46:47,998 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:46:49,095 WARN L205 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-05-03 16:46:50,244 WARN L205 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-05-03 16:46:51,241 WARN L205 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-05-03 16:46:51,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:46:51,758 INFO L93 Difference]: Finished difference Result 2419 states and 8049 transitions. [2021-05-03 16:46:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:46:51,763 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:46:51,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:46:51,767 INFO L225 Difference]: With dead ends: 2419 [2021-05-03 16:46:51,767 INFO L226 Difference]: Without dead ends: 2388 [2021-05-03 16:46:51,768 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 12029.6ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 16:46:51,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2021-05-03 16:46:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 1985. [2021-05-03 16:46:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 3.391633064516129) internal successors, (6729), 1984 states have internal predecessors, (6729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:46:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 6729 transitions. [2021-05-03 16:46:51,796 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 6729 transitions. Word has length 26 [2021-05-03 16:46:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:46:51,796 INFO L480 AbstractCegarLoop]: Abstraction has 1985 states and 6729 transitions. [2021-05-03 16:46:51,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:46:51,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 6729 transitions. [2021-05-03 16:46:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:46:51,799 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:46:51,799 INFO L551 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] [2021-05-03 16:46:52,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2826,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:46:52,001 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:46:52,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:46:52,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 59 times [2021-05-03 16:46:52,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:46:52,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791075048] [2021-05-03 16:46:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:46:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:46:52,341 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-05-03 16:46:52,532 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-05-03 16:46:52,778 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-05-03 16:46:53,048 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-05-03 16:46:53,765 WARN L205 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-05-03 16:46:54,219 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-05-03 16:46:54,461 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-05-03 16:46:54,681 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2021-05-03 16:46:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:46:54,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791075048] [2021-05-03 16:46:54,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752534934] [2021-05-03 16:46:54,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:46:54,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:46:54,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:46:54,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:46:54,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:46:55,130 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 16:46:55,498 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:46:55,897 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:46:56,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:56,174 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 [2021-05-03 16:46:56,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:56,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:56,205 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 [2021-05-03 16:46:56,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:56,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:56,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-05-03 16:46:56,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:56,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:56,267 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 38 treesize of output 16 [2021-05-03 16:46:56,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:56,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:56,298 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 36 treesize of output 16 [2021-05-03 16:46:56,304 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:56,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:56,328 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 39 treesize of output 19 [2021-05-03 16:46:56,335 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:56,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:56,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:46:56,368 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:56,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:56,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-05-03 16:46:56,400 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:56,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:56,426 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 34 treesize of output 16 [2021-05-03 16:46:56,433 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:56,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:56,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-05-03 16:46:56,466 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:56,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:56,491 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 36 treesize of output 16 [2021-05-03 16:46:56,498 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:56,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:56,525 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 34 treesize of output 16 [2021-05-03 16:46:56,533 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:56,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:56,561 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 41 treesize of output 19 [2021-05-03 16:46:56,568 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:56,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:56,593 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 [2021-05-03 16:46:56,604 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:56,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:56,629 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 39 treesize of output 19 [2021-05-03 16:46:56,635 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:56,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:56,651 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 27 treesize of output 13 [2021-05-03 16:46:56,659 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:56,914 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2021-05-03 16:46:56,916 INFO L628 ElimStorePlain]: treesize reduction 34, result has 49.3 percent of original size [2021-05-03 16:46:56,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:46:56,922 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-05-03 16:46:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:46:57,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:46:57,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 16:46:57,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772704767] [2021-05-03 16:46:57,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:46:57,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:46:57,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:46:57,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:46:57,203 INFO L87 Difference]: Start difference. First operand 1985 states and 6729 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:46:57,533 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2021-05-03 16:46:57,800 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-05-03 16:46:58,434 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 16:46:58,977 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 16:46:59,327 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-05-03 16:47:00,276 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-05-03 16:47:01,717 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-05-03 16:47:02,543 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 16:47:02,987 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-05-03 16:47:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:03,131 INFO L93 Difference]: Finished difference Result 2096 states and 7003 transitions. [2021-05-03 16:47:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:47:03,137 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:47:03,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:03,141 INFO L225 Difference]: With dead ends: 2096 [2021-05-03 16:47:03,142 INFO L226 Difference]: Without dead ends: 2081 [2021-05-03 16:47:03,142 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 7893.2ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:47:03,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2021-05-03 16:47:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 1995. [2021-05-03 16:47:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 3.3931795386158474) internal successors, (6766), 1994 states have internal predecessors, (6766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 6766 transitions. [2021-05-03 16:47:03,177 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 6766 transitions. Word has length 26 [2021-05-03 16:47:03,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:03,177 INFO L480 AbstractCegarLoop]: Abstraction has 1995 states and 6766 transitions. [2021-05-03 16:47:03,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:03,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 6766 transitions. [2021-05-03 16:47:03,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:47:03,180 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:03,180 INFO L551 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] [2021-05-03 16:47:03,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2840 [2021-05-03 16:47:03,385 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:03,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:03,385 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 43 times [2021-05-03 16:47:03,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:03,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825698959] [2021-05-03 16:47:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:03,590 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-05-03 16:47:03,737 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-05-03 16:47:04,092 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-05-03 16:47:04,697 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-05-03 16:47:05,215 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-03 16:47:05,702 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-05-03 16:47:06,097 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 16:47:06,287 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2021-05-03 16:47:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:06,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825698959] [2021-05-03 16:47:06,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619557212] [2021-05-03 16:47:06,292 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:06,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:47:06,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:06,723 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 16:47:07,022 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:47:07,432 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:47:07,784 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:47:09,584 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-05-03 16:47:09,900 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_318], 3=[v_prenex_316, v_prenex_320]} [2021-05-03 16:47:09,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:09,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:09,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:09,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:47:09,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:09,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:09,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:09,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:47:09,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:10,974 WARN L205 SmtUtils]: Spent 1000.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-05-03 16:47:10,976 INFO L628 ElimStorePlain]: treesize reduction 119, result has 50.4 percent of original size [2021-05-03 16:47:10,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:10,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:10,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:47:11,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:11,333 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:47:11,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:11,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:11,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:47:11,365 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:11,682 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:47:11,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:11,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:11,697 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 [2021-05-03 16:47:11,709 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:12,002 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:47:12,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:12,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:47:12,012 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:281, output treesize:56 [2021-05-03 16:47:12,293 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-05-03 16:47:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:12,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:12,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:47:12,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078885678] [2021-05-03 16:47:12,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:47:12,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:12,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:47:12,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:47:12,411 INFO L87 Difference]: Start difference. First operand 1995 states and 6766 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) [2021-05-03 16:47:12,801 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2021-05-03 16:47:13,054 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:47:13,614 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:47:14,400 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-05-03 16:47:15,138 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-05-03 16:47:16,232 WARN L205 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-05-03 16:47:16,944 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-05-03 16:47:17,858 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:47:19,330 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-05-03 16:47:20,556 WARN L205 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-05-03 16:47:21,224 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 16:47:21,700 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:47:21,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:21,891 INFO L93 Difference]: Finished difference Result 2554 states and 8430 transitions. [2021-05-03 16:47:21,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:47:21,896 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 [2021-05-03 16:47:21,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:21,901 INFO L225 Difference]: With dead ends: 2554 [2021-05-03 16:47:21,901 INFO L226 Difference]: Without dead ends: 2539 [2021-05-03 16:47:21,901 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 12704.0ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:47:21,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-05-03 16:47:21,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 2003. [2021-05-03 16:47:21,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.3916083916083917) internal successors, (6790), 2002 states have internal predecessors, (6790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:21,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6790 transitions. [2021-05-03 16:47:21,934 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6790 transitions. Word has length 26 [2021-05-03 16:47:21,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:21,934 INFO L480 AbstractCegarLoop]: Abstraction has 2003 states and 6790 transitions. [2021-05-03 16:47:21,934 INFO L481 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) [2021-05-03 16:47:21,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6790 transitions. [2021-05-03 16:47:21,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:47:21,937 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:21,937 INFO L551 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] [2021-05-03 16:47:22,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2854,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:22,138 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:22,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:22,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 60 times [2021-05-03 16:47:22,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:22,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244023470] [2021-05-03 16:47:22,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:22,470 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-05-03 16:47:22,768 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 16:47:23,023 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-05-03 16:47:23,431 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-03 16:47:23,850 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-03 16:47:24,244 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-05-03 16:47:24,482 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-05-03 16:47:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:24,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244023470] [2021-05-03 16:47:24,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606764265] [2021-05-03 16:47:24,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:24,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:47:24,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:24,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:47:24,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:25,035 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:47:25,323 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:47:25,780 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:47:26,314 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:47:28,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:28,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,210 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 32 treesize of output 16 [2021-05-03 16:47:28,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:28,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:28,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:47:28,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:28,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:28,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:47:28,328 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:28,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:28,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,385 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 41 treesize of output 16 [2021-05-03 16:47:28,391 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:28,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:28,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:47:28,437 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:28,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:28,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:47:28,494 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:28,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:28,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:47:28,551 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:28,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:28,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:47:28,610 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:28,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:28,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:47:28,668 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:28,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:28,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:47:28,731 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:28,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:28,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:47:28,801 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:28,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:28,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:47:28,861 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:28,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:28,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:47:28,912 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:28,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:28,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,946 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 28 treesize of output 13 [2021-05-03 16:47:28,953 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:28,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:28,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:28,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-05-03 16:47:28,978 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:29,196 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-05-03 16:47:29,197 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-05-03 16:47:29,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:47:29,205 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-05-03 16:47:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:29,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:29,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-05-03 16:47:29,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560942632] [2021-05-03 16:47:29,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:47:29,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:29,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:47:29,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:47:29,345 INFO L87 Difference]: Start difference. First operand 2003 states and 6790 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) 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) [2021-05-03 16:47:29,708 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 16:47:30,801 WARN L205 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-03 16:47:31,159 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 16:47:31,750 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-05-03 16:47:32,400 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-05-03 16:47:32,882 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:47:33,849 WARN L205 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-05-03 16:47:34,127 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 16:47:35,011 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 16:47:36,090 WARN L205 SmtUtils]: Spent 919.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-05-03 16:47:36,617 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:47:37,999 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-05-03 16:47:38,879 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 16:47:39,542 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 16:47:39,843 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:47:40,380 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:47:40,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:40,560 INFO L93 Difference]: Finished difference Result 2567 states and 8303 transitions. [2021-05-03 16:47:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:47:40,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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 26 [2021-05-03 16:47:40,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:40,571 INFO L225 Difference]: With dead ends: 2567 [2021-05-03 16:47:40,571 INFO L226 Difference]: Without dead ends: 2545 [2021-05-03 16:47:40,572 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 12600.6ms TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 16:47:40,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2021-05-03 16:47:40,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 2012. [2021-05-03 16:47:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 3.399801093983093) internal successors, (6837), 2011 states have internal predecessors, (6837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:40,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 6837 transitions. [2021-05-03 16:47:40,604 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 6837 transitions. Word has length 26 [2021-05-03 16:47:40,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:40,604 INFO L480 AbstractCegarLoop]: Abstraction has 2012 states and 6837 transitions. [2021-05-03 16:47:40,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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) [2021-05-03 16:47:40,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 6837 transitions. [2021-05-03 16:47:40,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:47:40,608 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:40,608 INFO L551 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] [2021-05-03 16:47:40,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2865 [2021-05-03 16:47:40,809 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:40,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:40,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 44 times [2021-05-03 16:47:40,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:40,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749002544] [2021-05-03 16:47:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:40,966 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-05-03 16:47:41,128 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-05-03 16:47:41,561 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 16:47:42,387 WARN L205 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-05-03 16:47:42,687 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:47:42,948 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:47:43,207 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 16:47:43,391 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-05-03 16:47:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:43,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749002544] [2021-05-03 16:47:43,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435359701] [2021-05-03 16:47:43,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:43,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:47:43,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:43,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 16:47:43,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:43,859 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 16:47:44,114 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:47:44,600 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:47:45,789 WARN L205 SmtUtils]: Spent 925.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:47:47,285 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-05-03 16:47:47,752 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_328], 2=[A, v_prenex_329]} [2021-05-03 16:47:47,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:47,772 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 [2021-05-03 16:47:47,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:48,837 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-05-03 16:47:48,840 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-05-03 16:47:48,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 [2021-05-03 16:47:48,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:48,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:47:48,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:49,336 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:47:49,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:49,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:49,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:49,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:47:49,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:49,661 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 16:47:49,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:49,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:47:49,672 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-05-03 16:47:50,009 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-05-03 16:47:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:50,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:50,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:47:50,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297933639] [2021-05-03 16:47:50,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:47:50,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:50,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:47:50,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:47:50,140 INFO L87 Difference]: Start difference. First operand 2012 states and 6837 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) [2021-05-03 16:47:50,546 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-05-03 16:47:50,904 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:47:51,558 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:47:52,402 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-05-03 16:47:53,213 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-05-03 16:47:55,253 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-05-03 16:47:55,971 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-05-03 16:47:57,576 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-05-03 16:47:58,402 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:47:59,473 WARN L205 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-05-03 16:48:01,636 WARN L205 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-05-03 16:48:03,318 WARN L205 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-05-03 16:48:06,516 WARN L205 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2021-05-03 16:48:08,617 WARN L205 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2021-05-03 16:48:09,570 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:48:10,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:48:10,085 INFO L93 Difference]: Finished difference Result 2646 states and 8732 transitions. [2021-05-03 16:48:10,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:48:10,092 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 [2021-05-03 16:48:10,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:48:10,097 INFO L225 Difference]: With dead ends: 2646 [2021-05-03 16:48:10,097 INFO L226 Difference]: Without dead ends: 2631 [2021-05-03 16:48:10,097 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 22223.2ms TimeCoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 16:48:10,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-05-03 16:48:10,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2017. [2021-05-03 16:48:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 3.4007936507936507) internal successors, (6856), 2016 states have internal predecessors, (6856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:10,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 6856 transitions. [2021-05-03 16:48:10,130 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 6856 transitions. Word has length 26 [2021-05-03 16:48:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:48:10,131 INFO L480 AbstractCegarLoop]: Abstraction has 2017 states and 6856 transitions. [2021-05-03 16:48:10,131 INFO L481 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) [2021-05-03 16:48:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 6856 transitions. [2021-05-03 16:48:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:48:10,134 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:48:10,134 INFO L551 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] [2021-05-03 16:48:10,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2979 [2021-05-03 16:48:10,334 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:48:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:48:10,335 INFO L82 PathProgramCache]: Analyzing trace with hash 152195194, now seen corresponding path program 45 times [2021-05-03 16:48:10,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:48:10,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921589276] [2021-05-03 16:48:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:48:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:48:10,492 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-05-03 16:48:10,646 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-05-03 16:48:11,040 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-05-03 16:48:11,752 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-03 16:48:12,666 WARN L205 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-05-03 16:48:13,478 WARN L205 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-03 16:48:13,732 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-05-03 16:48:13,970 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-05-03 16:48:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:13,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921589276] [2021-05-03 16:48:13,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591771524] [2021-05-03 16:48:13,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:14,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:48:14,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:48:14,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:48:14,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:48:14,455 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 16:48:14,784 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:48:16,149 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:48:17,510 WARN L205 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-05-03 16:48:18,237 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_350, v_prenex_342, v_prenex_337], 6=[v_prenex_339, v_prenex_344, v_prenex_346, v_prenex_348]} [2021-05-03 16:48:18,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:18,440 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-05-03 16:48:18,443 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:48:18,443 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-05-03 16:48:18,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:21,136 WARN L205 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 172 DAG size of output: 156 [2021-05-03 16:48:21,138 INFO L628 ElimStorePlain]: treesize reduction 226, result has 61.6 percent of original size [2021-05-03 16:48:21,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:21,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:21,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:48:21,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:23,437 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 155 DAG size of output: 152 [2021-05-03 16:48:23,440 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.7 percent of original size [2021-05-03 16:48:23,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:23,618 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-05-03 16:48:23,620 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:48:23,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:48:23,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:24,712 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 148 [2021-05-03 16:48:24,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:24,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:24,885 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-05-03 16:48:24,887 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:48:24,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:48:24,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:26,010 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 142 [2021-05-03 16:48:26,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:26,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:26,161 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 8 [2021-05-03 16:48:26,163 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:48:26,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:48:26,175 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:27,249 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 138 [2021-05-03 16:48:27,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:27,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:27,415 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 8 [2021-05-03 16:48:27,418 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:48:27,418 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:48:27,428 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:28,473 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 132 [2021-05-03 16:48:28,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:28,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:28,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:28,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 16:48:28,663 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:30,707 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 128 DAG size of output: 123 [2021-05-03 16:48:30,710 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-05-03 16:48:30,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:30,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:30,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:48:30,879 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:31,798 WARN L205 SmtUtils]: Spent 918.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-03 16:48:31,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:31,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:48:31,885 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:599, output treesize:323 [2021-05-03 16:48:33,817 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-05-03 16:48:34,488 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-05-03 16:48:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:34,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:48:34,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:48:34,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658800481] [2021-05-03 16:48:34,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:48:34,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:48:34,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:48:34,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:48:34,681 INFO L87 Difference]: Start difference. First operand 2017 states and 6856 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) [2021-05-03 16:48:35,171 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-05-03 16:48:35,679 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 20 [2021-05-03 16:48:36,063 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:48:37,204 WARN L205 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-03 16:48:38,473 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 26 [2021-05-03 16:48:39,143 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-05-03 16:48:41,118 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-05-03 16:48:41,866 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-05-03 16:48:42,869 WARN L205 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 40 [2021-05-03 16:48:46,478 WARN L205 SmtUtils]: Spent 3.20 s on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2021-05-03 16:48:48,153 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-05-03 16:48:48,959 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 16:48:50,488 WARN L205 SmtUtils]: Spent 878.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 16:48:51,149 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 16:48:56,014 WARN L205 SmtUtils]: Spent 4.56 s on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-05-03 16:48:59,023 WARN L205 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 126 DAG size of output: 111 [2021-05-03 16:49:02,650 WARN L205 SmtUtils]: Spent 3.45 s on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-05-03 16:49:06,616 WARN L205 SmtUtils]: Spent 2.96 s on a formula simplification. DAG size of input: 135 DAG size of output: 115 Received shutdown request... [2021-05-03 16:49:14,244 WARN L222 SmtUtils]: Removed 8 from assertion stack [2021-05-03 16:49:14,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:49:14,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2988,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:14,445 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 16:49:14,450 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 16:49:14,451 INFO L202 PluginConnector]: Adding new model max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 04:49:14 BasicIcfg [2021-05-03 16:49:14,451 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 16:49:14,451 INFO L168 Benchmark]: Toolchain (without parser) took 816005.25 ms. Allocated memory was 348.1 MB in the beginning and 604.0 MB in the end (delta: 255.9 MB). Free memory was 327.8 MB in the beginning and 563.5 MB in the end (delta: -235.7 MB). Peak memory consumption was 360.9 MB. Max. memory is 16.0 GB. [2021-05-03 16:49:14,452 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 348.1 MB. Free memory was 329.0 MB in the beginning and 328.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:49:14,452 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.70 ms. Allocated memory is still 348.1 MB. Free memory was 327.7 MB in the beginning and 326.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:49:14,452 INFO L168 Benchmark]: Boogie Preprocessor took 22.73 ms. Allocated memory is still 348.1 MB. Free memory was 326.3 MB in the beginning and 325.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 16:49:14,452 INFO L168 Benchmark]: RCFGBuilder took 367.37 ms. Allocated memory is still 348.1 MB. Free memory was 325.2 MB in the beginning and 312.4 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-03 16:49:14,452 INFO L168 Benchmark]: TraceAbstraction took 815582.30 ms. Allocated memory was 348.1 MB in the beginning and 604.0 MB in the end (delta: 255.9 MB). Free memory was 312.0 MB in the beginning and 563.5 MB in the end (delta: -251.5 MB). Peak memory consumption was 346.2 MB. Max. memory is 16.0 GB. [2021-05-03 16:49:14,452 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 0.20 ms. Allocated memory is still 348.1 MB. Free memory was 329.0 MB in the beginning and 328.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.70 ms. Allocated memory is still 348.1 MB. Free memory was 327.7 MB in the beginning and 326.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 22.73 ms. Allocated memory is still 348.1 MB. Free memory was 326.3 MB in the beginning and 325.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 367.37 ms. Allocated memory is still 348.1 MB. Free memory was 325.2 MB in the beginning and 312.4 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 815582.30 ms. Allocated memory was 348.1 MB in the beginning and 604.0 MB in the end (delta: 255.9 MB). Free memory was 312.0 MB in the beginning and 563.5 MB in the end (delta: -251.5 MB). Peak memory consumption was 346.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was constructing difference of abstraction (2017states) and FLOYD_HOARE automaton (currently 27 states, 18 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 97 for 7346ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 815396.6ms, OverallIterations: 108, TraceHistogramMax: 2, EmptinessCheckTime: 244.0ms, AutomataDifference: 479839.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 39.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4311 SDtfs, 22001 SDslu, 31973 SDs, 0 SdLazy, 59521 SolverSat, 3573 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 53627.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5683 GetRequests, 1970 SyntacticMatches, 108 SemanticMatches, 3604 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41554 ImplicationChecksByTransitivity, 527445.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2017occurred in iteration=107, InterpolantAutomatonStates: 2728, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2560.6ms AutomataMinimizationTime, 107 MinimizatonAttempts, 73346 StatesRemovedByMinimization, 107 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 373.4ms SsaConstructionTime, 1490.8ms SatisfiabilityAnalysisTime, 307022.6ms InterpolantComputationTime, 5350 NumberOfCodeBlocks, 5350 NumberOfCodeBlocksAsserted, 341 NumberOfCheckSat, 5137 ConstructedInterpolants, 95 QuantifiedInterpolants, 161377 SizeOfPredicates, 594 NumberOfNonLiveVariables, 6930 ConjunctsInSsa, 2116 ConjunctsInUnsatCore, 213 InterpolantComputations, 3 PerfectInterpolantSequences, 107/1250 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 [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process